Merced, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 9.1 °C (low) to 24.1 °C (high). Annual precipitation averages 330.7 Millimeters. 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 | 3.3 °C | 12.9 °C | 71.63 mm |
| February | 4.5 °C | 16.2 °C | 59.69 mm |
| March | 6.1 °C | 19.3 °C | 51.05 mm |
| April | 7.7 °C | 22.4 °C | 25.65 mm |
| May | 10.9 °C | 27.3 °C | 15.24 mm |
| June | 13.9 °C | 31.7 °C | 3.3 mm |
| July | 16.3 °C | 34.9 °C | 0.51 mm |
| August | 15.6 °C | 34.2 °C | 0.51 mm |
| September | 13.7 °C | 31.9 °C | 1.27 mm |
| October | 9.7 °C | 26.2 °C | 18.03 mm |
| November | 5.3 °C | 18.7 °C | 27.94 mm |
| December | 2.7 °C | 13.2 °C | 55.88 mm |
| Annual | 9.1 °C | 24.1 °C | 330.7 mm |
| 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 : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |