| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F | |
| 2012 Hardiness Zone: | Zone 3b: -35°F to -30°F Zone 5b: -15°F to -10°F Zone 4b: -25°F to -20°F Zone 5a: -20°F to -15°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. 11 - Jun. 20 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 12e - Upper Snake River Plain | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 83445 - Saint Anthony, ID | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 8 | 11 | 19 | 27 | 35 | 42 | 46 | 44 | 36 | 28 | 18 | 9 | 27 |
| Avg Max Temp (°F) | 29 | 34 | 44 | 55 | 66 | 74 | 83 | 83 | 73 | 60 | 42 | 30 | 56 |
| Avg Precip (In.) | 1.28 | .96 | 1.12 | 1.2 | 2.05 | 1.54 | 1 | .8 | .98 | 1.05 | 1.36 | 1.35 | 14.68 |