Merced, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 48.4 °F (low) to 75.4 °F (high). Annual precipitation averages 13 Inches. Merced is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 37.9 °F | 55.3 °F | 2.82 in. |
| February | 40.1 °F | 61.1 °F | 2.35 in. |
| March | 42.9 °F | 66.7 °F | 2.01 in. |
| April | 45.9 °F | 72.4 °F | 1.01 in. |
| May | 51.7 °F | 81.2 °F | 0.6 in. |
| June | 57.1 °F | 89.1 °F | 0.13 in. |
| July | 61.3 °F | 94.9 °F | 0.02 in. |
| August | 60.1 °F | 93.6 °F | 0.02 in. |
| September | 56.6 °F | 89.4 °F | 0.05 in. |
| October | 49.4 °F | 79.2 °F | 0.71 in. |
| November | 41.5 °F | 65.6 °F | 1.1 in. |
| December | 36.8 °F | 55.8 °F | 2.2 in. |
| Annual | 48.4 °F | 75.4 °F | 13.02 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 20-30 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 | Normal |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |