Douglas City, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 40.7 °F (low) to 70.7 °F (high). Annual precipitation averages 28.6 Inches. Douglas City is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 32.7 °F | 49.1 °F | 5.77 in. |
| February | 33.0 °F | 54.7 °F | 4.25 in. |
| March | 34.8 °F | 60.8 °F | 3.74 in. |
| April | 37.3 °F | 67.2 °F | 1.86 in. |
| May | 42.9 °F | 76.4 °F | 1.43 in. |
| June | 47.7 °F | 85.1 °F | 0.71 in. |
| July | 53.7 °F | 94.8 °F | 0.21 in. |
| August | 52.1 °F | 94.5 °F | 0.14 in. |
| September | 46.2 °F | 88.3 °F | 0.31 in. |
| October | 39.4 °F | 73.7 °F | 1.39 in. |
| November | 35.8 °F | 56.8 °F | 2.9 in. |
| December | 32.4 °F | 47.1 °F | 5.93 in. |
| Annual | 40.7 °F | 70.7 °F | 28.64 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |