| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°F |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°F |
| 1990 Hardiness Zone: | Zone 8b: 15F to 20F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | 2h - Cowlitz/Chehalis Foothills |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 98625 - Kalama, WA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 33 | 34 | 37 | 39 | 44 | 49 | 52 | 52 | 48 | 42 | 37 | 34 | 42 |
| Avg Max Temp (°F) | 45 | 50 | 55 | 61 | 67 | 72 | 78 | 79 | 74 | 63 | 51 | 45 | 62 |
| Avg Precip (In.) | 6.62 | 5.67 | 5.2 | 3.73 | 3.03 | 2.2 | .97 | 1.33 | 2.41 | 3.88 | 7.48 | 7.79 | 50.32 |