| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 5b: -15°F to -10°F | |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F | |
| Average First Frost Date: | Sep.11 - Sep. 20 | |
| Average Last Frost Date: | Jun. 11 - Jun. 20 | |
| Koppen-Geiger Climate Zone: | Dsb - Humid Continental Climate - Dry Cool Summer | |
| Ecoregion: | 77e - Okanogan Pine/Fir Hills | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 98833 - Mazama, WA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 23 | 27 | 34 | 40 | 46 | 50 | 52 | 45 | 36 | 27 | 21 | 35 |
| Avg Max Temp (°F) | 31 | 37 | 45 | 55 | 64 | 70 | 77 | 79 | 70 | 55 | 38 | 31 | 54 |
| Avg Precip (In.) | 5.95 | 4.27 | 2.48 | 1.44 | 1.13 | 1.06 | 1 | .9 | 1.21 | 2.41 | 4.69 | 6.35 | 32.89 |