| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F | |
| Average First Frost Date: | Sep. 21 - Sep. 30 | |
| Average Last Frost Date: | May 11 - May 20 | |
| Koppen-Geiger Climate Zone: | Dsb - Humid Continental Climate - Dry Cool Summer | |
| Ecoregion: | 15p - St. Joe Schist-Gneiss Zone | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 83861 - Saint Maries, ID | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 23 | 26 | 30 | 34 | 41 | 46 | 50 | 50 | 43 | 35 | 29 | 23 | 36 |
| Avg Max Temp (°F) | 34 | 41 | 49 | 58 | 66 | 73 | 82 | 83 | 73 | 57 | 40 | 34 | 57 |
| Avg Precip (In.) | 3.49 | 2.84 | 2.56 | 2.11 | 2.46 | 1.86 | 1.25 | 1.1 | 1.29 | 1.9 | 3.86 | 3.93 | 28.64 |