Wildomar, California has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 10.1 °C (low) to 26.6 °C (high). Annual precipitation averages 383 Millimeters. Wildomar is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.2 °C | 19.6 °C | 90.93 mm |
| February | 5.5 °C | 19.7 °C | 99.57 mm |
| March | 6.9 °C | 21.5 °C | 52.32 mm |
| April | 8.3 °C | 24.4 °C | 21.59 mm |
| May | 11.2 °C | 26.9 °C | 9.65 mm |
| June | 13.3 °C | 31 °C | 1.27 mm |
| July | 16.3 °C | 34.8 °C | 2.03 mm |
| August | 16.6 °C | 35.8 °C | 1.27 mm |
| September | 14.9 °C | 33.8 °C | 3.56 mm |
| October | 11.2 °C | 28.8 °C | 14.22 mm |
| November | 7.1 °C | 23.6 °C | 23.11 mm |
| December | 4.4 °C | 19.1 °C | 63.5 mm |
| Annual | 10.1 °C | 26.6 °C | 383.02 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9b : -3.9°C to -1.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |