| 2023 Hardiness Zone: | Zone 9b: 25°F to 30°F |
| 2012 Hardiness Zone: | Zone 9b: 25°F to 30°F |
| 1990 Hardiness Zone: | Zone 10a: 30F to 35F |
| Average First Frost Date: | Frost Rare |
| Average Last Frost Date: | Frost Rare |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 95501 - Eureka, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 41 | 41 | 42 | 44 | 47 | 50 | 53 | 53 | 51 | 47 | 44 | 40 | 46 |
| Avg Max Temp (°F) | 55 | 56 | 57 | 58 | 61 | 63 | 65 | 65 | 65 | 62 | 58 | 55 | 60 |
| Avg Precip (In.) | 6.41 | 5.69 | 5.85 | 3.09 | 1.65 | .66 | .16 | .39 | .9 | 2.46 | 6.11 | 6.67 | 40.02 |