Aguanga, California has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 48.2 °F (low) to 78.6 °F (high). Annual precipitation averages 15.1 Inches. Aguanga is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 39.5 °F | 65.7 °F | 3.21 in. |
| February | 40.0 °F | 65.3 °F | 3.37 in. |
| March | 41.8 °F | 69.0 °F | 2.24 in. |
| April | 44.3 °F | 73.9 °F | 1.01 in. |
| May | 49.1 °F | 79.4 °F | 0.42 in. |
| June | 52.6 °F | 88.3 °F | 0.06 in. |
| July | 59.5 °F | 94.7 °F | 0.22 in. |
| August | 60.4 °F | 96.1 °F | 0.24 in. |
| September | 57.3 °F | 91.3 °F | 0.34 in. |
| October | 50.7 °F | 81.8 °F | 0.6 in. |
| November | 44.2 °F | 72.8 °F | 1.04 in. |
| December | 38.6 °F | 64.4 °F | 2.36 in. |
| Annual | 48.2 °F | 78.6 °F | 15.11 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 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 |