Claremont, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 52.1 °F (low) to 77.6 °F (high). Annual precipitation averages 17.5 Inches. Claremont is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 44.0 °F | 66.7 °F | 3.95 in. |
| February | 44.6 °F | 67.1 °F | 4.29 in. |
| March | 46.6 °F | 70.1 °F | 2.97 in. |
| April | 48.9 °F | 73.9 °F | 0.78 in. |
| May | 52.9 °F | 77.6 °F | 0.58 in. |
| June | 56.8 °F | 83.8 °F | 0.13 in. |
| July | 61.5 °F | 90.2 °F | 0.09 in. |
| August | 62.4 °F | 92.2 °F | 0.02 in. |
| September | 60.7 °F | 89.3 °F | 0.15 in. |
| October | 55.1 °F | 81.0 °F | 0.82 in. |
| November | 48.0 °F | 73.2 °F | 1.05 in. |
| December | 43.9 °F | 65.6 °F | 2.63 in. |
| Annual | 52.1 °F | 77.6 °F | 17.46 in. |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 10a : 30°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 10a : 30°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |