Elmira, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 48 °F (low) to 73.5 °F (high). Annual precipitation averages 23.4 Inches. 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 | 38.3 °F | 55.9 °F | 4.88 in. |
| February | 40.7 °F | 60.9 °F | 4.87 in. |
| March | 43.5 °F | 65.7 °F | 3.21 in. |
| April | 46.2 °F | 70.5 °F | 1.39 in. |
| May | 51.2 °F | 77.6 °F | 0.73 in. |
| June | 55.7 °F | 85.1 °F | 0.18 in. |
| July | 57.9 °F | 89.9 °F | 0.0 in. |
| August | 57.5 °F | 89.3 °F | 0.02 in. |
| September | 55.5 °F | 86.8 °F | 0.07 in. |
| October | 49.8 °F | 78.1 °F | 0.98 in. |
| November | 42.3 °F | 65.4 °F | 2.14 in. |
| December | 37.8 °F | 56.3 °F | 4.88 in. |
| Annual | 48 °F | 73.5 °F | 23.35 in. |
| 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 : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |