YEAR 2026 - GROWING DEGREE DAYS JANUARY THROUGH OCTOBER
CALCULATED AT BASE 50, BASE 40, AND BASE 32
January
| Temperatures |
Growing Degree Days |
| Day |
MAX |
MIN |
Base 50 |
Base 40 |
Base 32 |
| 1 |
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| 2 |
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| 3 |
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| 4 |
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| 5 |
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| 6 |
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| 7 |
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| 8 |
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| 9 |
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| 10 |
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| 11 |
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| 12 |
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| 13 |
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| 14 |
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| 15 |
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| 16 |
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| 17 |
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| 18 |
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| 19 |
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| 20 |
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| 21 |
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| 22 |
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| 23 |
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| 24 |
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| 25 |
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| 26 |
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| 27 |
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| 28 |
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| 29 |
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| 30 |
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| 31 |
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| |
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| |
AV MAX |
AV MIN |
Total Base 50 |
Total Base 40 |
Total Base 32 |
| |
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February
| Temperatures |
Growing Degree Days |
| Day |
MAX |
MIN |
Base 50 |
Base 40 |
Base 32 |
| 1 |
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| 2 |
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| 3 |
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| 4 |
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| 5 |
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| 6 |
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| 7 |
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| 8 |
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| 9 |
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| 10 |
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| 11 |
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| 12 |
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| 13 |
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| 14 |
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| 15 |
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| 16 |
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| 17 |
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| 18 |
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| 19 |
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| 20 |
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| 21 |
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| 22 |
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| 23 |
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| 24 |
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| 25 |
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| 26 |
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| 27 |
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| 28 |
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| 29 |
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| |
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| |
AV MAX |
AV MIN |
Total Base 50 |
Total Base 40 |
Total Base 32 |
| |
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March
| Temperatures |
Growing Degree Days |
| Day |
MAX |
MIN |
Base 50 |
Base 40 |
Base 32 |
| 1 |
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| 2 |
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| 3 |
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| 4 |
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| 5 |
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| 6 |
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| 7 |
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| 8 |
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| 9 |
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| 10 |
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| 11 |
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| 12 |
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| 13 |
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| 14 |
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| 15 |
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| 16 |
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| 17 |
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| 18 |
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| 19 |
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| 20 |
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| 21 |
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| 22 |
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| 23 |
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| 24 |
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| 25 |
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| 26 |
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| 27 |
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| 28 |
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| 29 |
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| 30 |
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| 31 |
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| |
AV MAX |
AVMIN |
Total Base 50 |
Total Base 40 |
Total Base 32 |
| |
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April
| Temperatures |
Growing Degree Days |
| Day |
MAX |
MIN |
Base 50 |
Base 40 |
Base 32 |
| 1 |
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| 2 |
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| 3 |
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| 4 |
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| 5 |
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| 6 |
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| 7 |
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| 8 |
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| 9 |
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| 10 |
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| 11 |
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| 12 |
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| 13 |
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| 14 |
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| 15 |
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| 16 |
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| 17 |
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| 18 |
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| 19 |
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| 20 |
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| 21 |
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| 22 |
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| 23 |
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| 24 |
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| 25 |
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| 26 |
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| 27 |
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| 28 |
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| 29 |
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| 30 |
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| |
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| |
AV MAX |
AV MIN |
Total Base 50 |
Total Base 40 |
Total Base 32 |
| |
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May
| Temperatures |
Growing Degree Days |
| Day |
MAX |
MIN |
Base 50 |
Base 40 |
Base 32 |
| 1 |
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| 2 |
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| 3 |
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| 4 |
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| 5 |
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| 6 |
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| 7 |
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| 8 |
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| 9 |
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| 10 |
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| 11 |
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| 12 |
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| 13 |
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| 14 |
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| 15 |
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| 16 |
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| 17 |
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| 18 |
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| 19 |
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| 20 |
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| 21 |
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| 22 |
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| 23 |
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| 24 |
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| 25 |
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| 26 |
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| 27 |
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| 28 |
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| 29 |
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| 30 |
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| 31 |
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| |
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| |
AV MAX |
AV MIN |
Total Base 50 |
Total Base 40 |
Total Base 32 |
| |
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|
June
| Temperatures |
Growing Degree Days |
| Day |
MAX |
MIN |
Base 50 |
Base 40 |
Base 32 |
| 1 |
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| 2 |
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| 3 |
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| 4 |
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| 5 |
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| 6 |
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| 7 |
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| 8 |
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| 9 |
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| 10 |
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| 11 |
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| 12 |
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| 13 |
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| 14 |
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| 15 |
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| 16 |
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| 17 |
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| 18 |
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| 19 |
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| 20 |
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| 21 |
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| 22 |
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| 23 |
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| 24 |
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| 25 |
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| 26 |
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| 27 |
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| 28 |
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| 29 |
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| 30 |
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| |
AV MAX |
AV MIN |
Total Base 50 |
Total Base 40 |
Total Base 32 |
| |
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|
July
| Temperatures |
Growing Degree Days |
| Day |
MAX |
MIN |
Base 50 |
Base 40 |
Base 32 |
| 1 |
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| 2 |
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| 3 |
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| 4 |
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| 5 |
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| 6 |
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| 7 |
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| 8 |
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| 9 |
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| 10 |
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| 11 |
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| 12 |
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| 13 |
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| 14 |
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| 15 |
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| 16 |
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| 17 |
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| 18 |
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| 19 |
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| 20 |
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| 21 |
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| 22 |
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| 23 |
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| 24 |
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| 25 |
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| 26 |
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| 27 |
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| 28 |
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| 29 |
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| 30 |
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| 31 |
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| |
AV MAX |
AV MIN |
Total Base 50 |
Total Base 40 |
Total Base 32 |
| |
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|
August
| Temperatures |
Growing Degree Days |
| Day |
MAX |
MIN |
Base 50 |
Base 40 |
Base 32 |
| 1 |
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| 2 |
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| 3 |
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| 4 |
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| 5 |
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| 6 |
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| 7 |
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| 8 |
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| 9 |
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| 10 |
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| 11 |
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| 12 |
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| 13 |
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| 14 |
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| 15 |
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| 16 |
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| 17 |
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| 18 |
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| 19 |
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| 20 |
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| 21 |
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| 22 |
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| 23 |
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| 24 |
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| 25 |
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| 26 |
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| 27 |
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| 28 |
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| 29 |
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| 30 |
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| 31 |
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| |
AV MAX |
AV MIN |
Total Base 50 |
Total Base 40 |
Total Base 32 |
| |
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|
September
| Temperatures |
Growing Degree Days |
| Day |
MAX |
MIN |
Base 50 |
Base 40 |
Base 32 |
| 1 |
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| 2 |
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| 3 |
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| 4 |
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| 5 |
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| 6 |
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| 7 |
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| 8 |
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| 9 |
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| 10 |
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| 11 |
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| 12 |
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| 13 |
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| 14 |
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| 15 |
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| 16 |
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| 17 |
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| 18 |
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| 19 |
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| 20 |
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| 21 |
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| 22 |
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| 23 |
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| 24 |
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| 25 |
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| 26 |
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| 27 |
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| 28 |
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| 29 |
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| 30 |
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| |
AV MAX |
AV MIN |
Total Base 50 |
Total Base 40 |
Total Base 32 |
| |
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|
October
| Temperatures |
Growing Degree Days |
| Day |
MAX |
MIN |
Base 50 |
Base 40 |
Base 32 |
| 1 |
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| 2 |
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| 3 |
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| 4 |
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| 5 |
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| 6 |
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| 7 |
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| 8 |
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| 9 |
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| 10 |
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| 11 |
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| 12 |
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| 13 |
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| 14 |
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| 15 |
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| 16 |
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| 17 |
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| 18 |
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| 19 |
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| 20 |
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| 21 |
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| 22 |
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| 23 |
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| 24 |
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| 25 |
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| 26 |
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| 27 |
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| 28 |
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| 29 |
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| 30 |
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| 31 |
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AV MAX |
AV MIN |
Total Base 50 |
Total Base 40 |
Total Base 32 |
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Northwestern Ag Research Center
4570 Montana Hwy 35
Kalispell, MT 59901
Office Tel: (406) 994-4312
Hours: 7:00 A.M-4:00 P.M. M-F
Superintendent
Jessica A. Torrion (JT)
JT's direct line 406-994-4304
jessica.torrion@montana.edu
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