| 2023 Hardiness Zone: | 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 7a: 0°F to 5°F |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dsb - Humid Continental Climate - Dry Cool Summer |
| Ecoregion: | 10a - Channeled Scablands |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 98831 - Manson, WA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 24 | 31 | 39 | 47 | 53 | 58 | 58 | 49 | 38 | 30 | 22 | 39 |
| Avg Max Temp (°F) | 33 | 40 | 51 | 61 | 70 | 77 | 85 | 85 | 76 | 61 | 44 | 33 | 60 |
| Avg Precip (In.) | 1.47 | 1.17 | .94 | .53 | .68 | .72 | .32 | .39 | .46 | .61 | 1.55 | 1.74 | 10.58 |