Meridian, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 9.3 °C (low) to 23.9 °C (high). Annual precipitation averages 448.3 Millimeters. Meridian is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Feb. 1 - Feb. 10 through the first frost around Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.8 °C | 13.1 °C | 81.03 mm |
| February | 5.2 °C | 16 °C | 100.33 mm |
| March | 6.5 °C | 19.2 °C | 48.26 mm |
| April | 7.9 °C | 22.6 °C | 33.78 mm |
| May | 11.6 °C | 27.1 °C | 18.8 mm |
| June | 14.6 °C | 31.2 °C | 7.62 mm |
| July | 15.7 °C | 34 °C | 0.51 mm |
| August | 14.8 °C | 33.6 °C | 3.56 mm |
| September | 13.1 °C | 31.8 °C | 5.33 mm |
| October | 9.4 °C | 26.3 °C | 22.35 mm |
| November | 5.6 °C | 18.2 °C | 48.01 mm |
| December | 3.4 °C | 13.1 °C | 78.74 mm |
| Annual | 9.3 °C | 23.9 °C | 448.32 mm |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Feb. 1 - Feb. 10 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9b : -3.9°C to -1.1°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |