Comptche, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 7.5 °C (low) to 19.7 °C (high). Annual precipitation averages 1149.6 Millimeters. Comptche is located in USDA Plant Hardiness Zone 10a. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Dec. 11 - Dec. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.3 °C | 13.5 °C | 197.61 mm |
| February | 5.3 °C | 13.8 °C | 171.2 mm |
| March | 5.7 °C | 14.7 °C | 164.34 mm |
| April | 6.3 °C | 18.6 °C | 90.17 mm |
| May | 7.8 °C | 19.7 °C | 56.13 mm |
| June | 9.4 °C | 22.2 °C | 13.46 mm |
| July | 10.2 °C | 26.7 °C | 1.52 mm |
| August | 10.4 °C | 26.7 °C | 4.83 mm |
| September | 9.8 °C | 27.4 °C | 7.37 mm |
| October | 8.3 °C | 23.1 °C | 55.63 mm |
| November | 6.5 °C | 15.8 °C | 131.32 mm |
| December | 4.9 °C | 14.1 °C | 256.03 mm |
| Annual | 7.5 °C | 19.7 °C | 1149.61 mm |
| Average First Frost Date | Dec. 11 - Dec. 20 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 10a : -1.1°C to 1.7°C |
| Plant Hardiness Zone - 2012 | Zone 9b : -3.9°C to -1.1°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |