| 2023 Hardiness Zone: | 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: | Sep.11 - Sep. 20 | |
| Average Last Frost Date: | May 11 - May 20 | |
| Koppen-Geiger Climate Zone: | Dsb - Humid Continental Climate - Dry Cool Summer | |
| Ecoregion: | 10h - Palouse Hills | |
| Current Drought Status: | Moderate Drought | |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 99158 - Oakesdale, WA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 23 | 27 | 31 | 35 | 40 | 45 | 49 | 49 | 41 | 34 | 29 | 23 | 36 |
| Avg Max Temp (°F) | 36 | 42 | 50 | 58 | 66 | 72 | 82 | 83 | 74 | 61 | 43 | 36 | 59 |
| Avg Precip (In.) | 2.1 | 1.76 | 1.96 | 1.61 | 1.91 | 1.55 | .92 | .74 | .9 | 1.44 | 2.57 | 2.58 | 20.03 |