| 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 Zone 7b: 5°F to 10°F |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | 1f - Willapa Hills |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 98541 - Elma, WA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 33 | 34 | 36 | 38 | 43 | 46 | 49 | 50 | 45 | 40 | 35 | 33 | 40 |
| Avg Max Temp (°F) | 47 | 50 | 55 | 61 | 67 | 71 | 77 | 78 | 73 | 63 | 51 | 46 | 62 |
| Avg Precip (In.) | 9.74 | 8.34 | 7.13 | 4.78 | 3.22 | 2.21 | 1.21 | 1.36 | 2.83 | 5.48 | 9.95 | 11.1 | 67.36 |