South El Monte, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 55.1 °F (low) to 78.1 °F (high). Annual precipitation averages 15.6 Inches. South El Monte is located in USDA Plant Hardiness Zone 10b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 46.7 °F | 69.2 °F | 3.53 in. |
| February | 48.0 °F | 69.3 °F | 4.11 in. |
| March | 50.3 °F | 71.3 °F | 2.55 in. |
| April | 52.6 °F | 76.9 °F | 0.87 in. |
| May | 56.9 °F | 78.3 °F | 0.37 in. |
| June | 60.5 °F | 82.5 °F | 0.1 in. |
| July | 63.9 °F | 87.1 °F | 0.03 in. |
| August | 64.5 °F | 89.3 °F | 0.01 in. |
| September | 63.0 °F | 88.0 °F | 0.13 in. |
| October | 58.1 °F | 82.4 °F | 0.56 in. |
| November | 51.2 °F | 74.9 °F | 0.78 in. |
| December | 45.9 °F | 68.5 °F | 2.56 in. |
| Annual | 55.1 °F | 78.1 °F | 15.6 in. |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 10b : 35°F to 30°F |
| Plant Hardiness Zone - 2012 | Zone 10a : 30°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |