Temecula, California has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 10.3 °C (low) to 25.9 °C (high). Annual precipitation averages 391.7 Millimeters. Temecula is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Dec. 11 - Dec. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.7 °C | 19.8 °C | 87.88 mm |
| February | 5.9 °C | 19.6 °C | 99.82 mm |
| March | 7.1 °C | 20.8 °C | 59.94 mm |
| April | 8.6 °C | 23.8 °C | 24.13 mm |
| May | 11.4 °C | 25.8 °C | 9.14 mm |
| June | 13.1 °C | 29.4 °C | 2.29 mm |
| July | 15.7 °C | 33.7 °C | 1.78 mm |
| August | 16.3 °C | 34.6 °C | 0.76 mm |
| September | 15 °C | 32.2 °C | 3.81 mm |
| October | 11.8 °C | 27.8 °C | 14.48 mm |
| November | 8.1 °C | 23.6 °C | 27.69 mm |
| December | 5.1 °C | 19.4 °C | 59.94 mm |
| Annual | 10.3 °C | 25.9 °C | 391.66 mm |
| Average First Frost Date | Dec. 11 - Dec. 20 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| Average Days With Frost | 10-20 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 | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |