| 2023 Hardiness Zone: | Zone 9a: 20°F to 25°F Zone 9b: 25°F to 30°F | |
| 2012 Hardiness Zone: | Zone 9a: 20°F to 25°F Zone 9b: 25°F to 30°F | |
| 1990 Hardiness Zone: | Zone 9a: 20F to 25F | |
| Average First Frost Date: | Dec. 1 - Dec. 10 | |
| Average Last Frost Date: | Feb. 21 - Feb. 29 | |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate | |
| Ecoregion: | ||
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 95301 - Atwater, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 37 | 40 | 42 | 45 | 51 | 56 | 60 | 59 | 56 | 48 | 41 | 36 | 48 |
| Avg Max Temp (°F) | 55 | 62 | 67 | 75 | 83 | 91 | 96 | 94 | 90 | 81 | 65 | 55 | 76 |
| Avg Precip (In.) | 2.41 | 2.39 | 2.19 | .87 | .45 | .1 | .03 | .02 | .22 | .72 | 1.41 | 1.58 | 12.4 |