Perris, California has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 49.6 °F (low) to 79.7 °F (high). Annual precipitation averages 10.2 Inches. Perris is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 40.1 °F | 66.6 °F | 2.47 in. |
| February | 40.7 °F | 67.0 °F | 2.95 in. |
| March | 43.7 °F | 70.6 °F | 1.18 in. |
| April | 46.4 °F | 75.4 °F | 0.7 in. |
| May | 51.8 °F | 81.0 °F | 0.23 in. |
| June | 55.8 °F | 88.5 °F | 0.05 in. |
| July | 61.4 °F | 95.4 °F | 0.05 in. |
| August | 62.0 °F | 96.7 °F | 0.07 in. |
| September | 58.6 °F | 92.5 °F | 0.13 in. |
| October | 51.6 °F | 82.7 °F | 0.34 in. |
| November | 44.1 °F | 73.9 °F | 0.67 in. |
| December | 38.9 °F | 66.1 °F | 1.38 in. |
| Annual | 49.6 °F | 79.7 °F | 10.22 in. |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |