Redlands, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 51.7 °F (low) to 79.1 °F (high). Annual precipitation averages 12.6 Inches. Redlands is located in USDA Plant Hardiness Zone 10a. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 42.5 °F | 66.3 °F | 2.66 in. |
| February | 43.1 °F | 66.6 °F | 3.06 in. |
| March | 45.8 °F | 70.2 °F | 1.98 in. |
| April | 48.5 °F | 74.7 °F | 0.87 in. |
| May | 53.2 °F | 79.9 °F | 0.34 in. |
| June | 57.3 °F | 87.5 °F | 0.08 in. |
| July | 62.8 °F | 94.6 °F | 0.09 in. |
| August | 63.7 °F | 95.7 °F | 0.08 in. |
| September | 60.9 °F | 92.1 °F | 0.13 in. |
| October | 54.2 °F | 82.1 °F | 0.52 in. |
| November | 46.9 °F | 73.4 °F | 0.82 in. |
| December | 41.7 °F | 65.5 °F | 1.97 in. |
| Annual | 51.7 °F | 79.1 °F | 12.6 in. |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 10a : 30°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |