| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7b: 5°F to 10°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 7a: 0°F to 5°F Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F | |
| Average First Frost Date: | Oct. 1 - Oct. 10 | |
| Average Last Frost Date: | Jun. 1 - Jun. 10 | |
| Koppen-Geiger Climate Zone: | Dsb - Humid Continental Climate - Dry Cool Summer | |
| Ecoregion: | 77h - Chiwaukum Hills and Lowlands | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 98922 - Cle Elum, WA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 22 | 24 | 28 | 33 | 40 | 47 | 52 | 51 | 43 | 34 | 29 | 23 | 36 |
| Avg Max Temp (°F) | 35 | 40 | 47 | 54 | 63 | 69 | 78 | 79 | 71 | 59 | 42 | 34 | 56 |
| Avg Precip (In.) | 4.93 | 3.47 | 2.65 | 1.36 | 1.03 | .96 | .45 | .6 | 1.02 | 2.56 | 4.45 | 5.27 | 28.75 |