Calexico, California has a Hot Desert Climate climate (Köppen classification: BWh). Average annual temperatures range from 58.5 °F (low) to 88 °F (high). Annual precipitation averages 2.4 Inches. Calexico is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 42.3 °F | 70.0 °F | 0.4 in. |
| February | 45.1 °F | 73.3 °F | 0.33 in. |
| March | 50.0 °F | 79.4 °F | 0.25 in. |
| April | 54.9 °F | 85.6 °F | 0.09 in. |
| May | 61.4 °F | 93.3 °F | 0.03 in. |
| June | 68.6 °F | 102.3 °F | 0.0 in. |
| July | 77.1 °F | 106.5 °F | 0.1 in. |
| August | 78.3 °F | 106.3 °F | 0.32 in. |
| September | 72.2 °F | 101.7 °F | 0.18 in. |
| October | 60.5 °F | 91.0 °F | 0.21 in. |
| November | 49.4 °F | 78.3 °F | 0.12 in. |
| December | 42.1 °F | 68.3 °F | 0.35 in. |
| Annual | 58.5 °F | 88 °F | 2.38 in. |
| Average First Frost Date | Frost Rare |
| 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 | Abnormally Dry |
| Köppen Climate Classification | BWh - Hot Desert Climate |