Dunnigan, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 48.2 °F (low) to 74.6 °F (high). Annual precipitation averages 20.2 Inches. Dunnigan is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Jan. 21 - Jan. 31 through the first frost around Dec. 21 - Dec. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 38.6 °F | 55.6 °F | 4.31 in. |
| February | 41.0 °F | 60.8 °F | 4.37 in. |
| March | 43.4 °F | 66.2 °F | 2.72 in. |
| April | 45.9 °F | 71.8 °F | 1.16 in. |
| May | 51.7 °F | 80.3 °F | 0.67 in. |
| June | 56.8 °F | 87.3 °F | 0.15 in. |
| July | 58.9 °F | 92.7 °F | 0.01 in. |
| August | 57.8 °F | 92.4 °F | 0.05 in. |
| September | 55.4 °F | 88.8 °F | 0.11 in. |
| October | 49.4 °F | 78.7 °F | 0.79 in. |
| November | 42.0 °F | 64.9 °F | 1.91 in. |
| December | 38.0 °F | 55.7 °F | 3.9 in. |
| Annual | 48.2 °F | 74.6 °F | 20.15 in. |
| Average First Frost Date | Dec. 21 - Dec. 31 |
| Average Last Frost Date | Jan. 21 - Jan. 31 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |