| 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 11 - May 20 | |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate | |
| Ecoregion: | 1f - Willapa Hills | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 97048 - Rainier, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 33 | 34 | 36 | 39 | 44 | 48 | 52 | 52 | 48 | 42 | 37 | 34 | 41 |
| Avg Max Temp (°F) | 45 | 50 | 55 | 60 | 66 | 70 | 76 | 77 | 73 | 62 | 51 | 45 | 61 |
| Avg Precip (In.) | 6.99 | 5.86 | 5.01 | 3.92 | 2.82 | 2.08 | .96 | 1.18 | 2.28 | 4.02 | 7.65 | 7.75 | 50.51 |