| 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 6a: -10F to -5F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dsb - Humid Continental Climate - Dry Cool Summer |
| Ecoregion: | 15s - Spokane Valley Outwash Plains |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 83858 - Rathdrum, ID | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 22 | 24 | 29 | 34 | 41 | 48 | 53 | 53 | 45 | 36 | 29 | 23 | 36 |
| Avg Max Temp (°F) | 34 | 39 | 48 | 56 | 65 | 71 | 80 | 80 | 71 | 57 | 40 | 34 | 56 |
| Avg Precip (In.) | 2.7 | 2.2 | 2.2 | 1.74 | 2.15 | 1.8 | 1.03 | .99 | 1.07 | 1.54 | 3.13 | 3.08 | 23.63 |