| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| Average First Frost Date: | Aug. 21 - Aug. 31 |
| Average Last Frost Date: | Jun. 21 - Jun. 30 |
| Koppen-Geiger Climate Zone: | Dsb - Humid Continental Climate - Dry Cool Summer |
| Ecoregion: | 9j - Klamath Juniper Woodland |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 97639 - Sprague River, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 20 | 24 | 26 | 31 | 37 | 42 | 40 | 33 | 26 | 23 | 17 | 28 |
| Avg Max Temp (°F) | 39 | 44 | 50 | 57 | 66 | 75 | 85 | 84 | 76 | 64 | 47 | 39 | 60 |
| Avg Precip (In.) | 2.18 | 1.5 | 1.7 | .89 | 1.05 | .72 | .4 | .57 | .63 | .98 | 1.86 | 1.82 | 14.32 |