| 2023 Hardiness Zone: | Zone 9b: 25°F to 30°F Zone 10a: 30°F to 35°F | |
| 2012 Hardiness Zone: | Zone 9b: 25°F to 30°F | |
| 1990 Hardiness Zone: | Zone 9b: 25F to 30F | |
| Average First Frost Date: | Dec. 1 - Dec. 10 | |
| Average Last Frost Date: | Mar. 1 - Mar. 10 | |
| 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 92557 - Moreno Valley, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 40 | 42 | 43 | 46 | 51 | 55 | 61 | 62 | 58 | 51 | 44 | 40 | 49 |
| Avg Max Temp (°F) | 65 | 67 | 68 | 75 | 80 | 88 | 96 | 96 | 91 | 83 | 73 | 66 | 79 |
| Avg Precip (In.) | 3.27 | 3.22 | 2.85 | .83 | .5 | .13 | .1 | .24 | .42 | .52 | 1.03 | 1.66 | 14.78 |