| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°F | |
| 2012 Hardiness Zone: | Zone 8a: 10°F to 15°F | |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F | |
| Average First Frost Date: | Oct. 11 - Oct. 20 | |
| Average Last Frost Date: | May 1 - May 10 | |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate | |
| Ecoregion: | 2g - Southern Puget Prairies | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 98576 - Rainier, WA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 33 | 34 | 36 | 38 | 44 | 48 | 51 | 52 | 47 | 41 | 37 | 33 | 41 |
| Avg Max Temp (°F) | 45 | 49 | 53 | 59 | 65 | 70 | 76 | 77 | 72 | 61 | 50 | 45 | 60 |
| Avg Precip (In.) | 6.44 | 5.35 | 4.84 | 3.54 | 2.53 | 2.01 | .97 | 1.3 | 2.08 | 3.93 | 7.06 | 7.05 | 47.1 |