Elmira, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 8.9 °C (low) to 23 °C (high). Annual precipitation averages 593.1 Millimeters. Elmira is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Dec. 11 - Dec. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.5 °C | 13.3 °C | 123.95 mm |
| February | 4.8 °C | 16.1 °C | 123.7 mm |
| March | 6.4 °C | 18.7 °C | 81.53 mm |
| April | 7.9 °C | 21.4 °C | 35.31 mm |
| May | 10.7 °C | 25.3 °C | 18.54 mm |
| June | 13.2 °C | 29.5 °C | 4.57 mm |
| July | 14.4 °C | 32.2 °C | 0 mm |
| August | 14.2 °C | 31.8 °C | 0.51 mm |
| September | 13.1 °C | 30.4 °C | 1.78 mm |
| October | 9.9 °C | 25.6 °C | 24.89 mm |
| November | 5.7 °C | 18.6 °C | 54.36 mm |
| December | 3.2 °C | 13.5 °C | 123.95 mm |
| Annual | 8.9 °C | 23 °C | 593.09 mm |
| Average First Frost Date | Dec. 11 - Dec. 20 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| 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 | Normal |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |