Mariposa, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 47.6 °F (low) to 73.6 °F (high). Annual precipitation averages 30.2 Inches. Mariposa is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 36.4 °F | 56.8 °F | 6.18 in. |
| February | 37.6 °F | 58.6 °F | 5.34 in. |
| March | 40.4 °F | 62.9 °F | 4.5 in. |
| April | 42.7 °F | 67.0 °F | 2.56 in. |
| May | 49.1 °F | 76.8 °F | 1.21 in. |
| June | 56.2 °F | 86.6 °F | 0.37 in. |
| July | 63.2 °F | 94.1 °F | 0.05 in. |
| August | 62.2 °F | 93.5 °F | 0.06 in. |
| September | 57.5 °F | 87.9 °F | 0.17 in. |
| October | 49.3 °F | 77.0 °F | 1.49 in. |
| November | 41.2 °F | 64.9 °F | 2.92 in. |
| December | 35.6 °F | 56.5 °F | 5.34 in. |
| Annual | 47.6 °F | 73.6 °F | 30.19 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |