| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F | |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F Zone 4b: -25°F to -20°F Zone 6a: -10°F to -5°F Zone 4a: -30°F to -25°F | |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F | |
| Average First Frost Date: | Sep.1 - Sep. 10 | |
| Average Last Frost Date: | Jun. 1 - Jun. 10 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 18c - Wet Valleys | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 83254 - Montpelier, ID | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 8 | 8 | 18 | 26 | 35 | 41 | 47 | 45 | 37 | 27 | 18 | 9 | 27 |
| Avg Max Temp (°F) | 30 | 34 | 42 | 52 | 62 | 73 | 82 | 82 | 71 | 58 | 40 | 31 | 55 |
| Avg Precip (In.) | 1.31 | 1.23 | 1.34 | 1.23 | 1.78 | 1.36 | .91 | .99 | 1.32 | 1.3 | 1.19 | 1.19 | 15.14 |