Elmira, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 5.5 °C (low) to 17.7 °C (high). Annual precipitation averages 1183.4 Millimeters. Elmira is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.6 °C | 8.6 °C | 185.93 mm |
| February | 1.6 °C | 10.7 °C | 141.22 mm |
| March | 2.7 °C | 13.3 °C | 141.48 mm |
| April | 4.1 °C | 16.2 °C | 90.42 mm |
| May | 6.6 °C | 19.8 °C | 63.75 mm |
| June | 8.8 °C | 23.1 °C | 33.53 mm |
| July | 10.8 °C | 28.4 °C | 6.6 mm |
| August | 10.7 °C | 28.7 °C | 8.89 mm |
| September | 8.7 °C | 25.5 °C | 32.77 mm |
| October | 5.7 °C | 18.2 °C | 81.53 mm |
| November | 3.3 °C | 11.6 °C | 169.93 mm |
| December | 1.4 °C | 8 °C | 227.33 mm |
| Annual | 5.5 °C | 17.7 °C | 1183.38 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |