Elmira, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 41.9 °F (low) to 63.8 °F (high). Annual precipitation averages 46.6 Inches. 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 | 34.8 °F | 47.5 °F | 7.32 in. |
| February | 34.9 °F | 51.3 °F | 5.56 in. |
| March | 36.8 °F | 56.0 °F | 5.57 in. |
| April | 39.4 °F | 61.1 °F | 3.56 in. |
| May | 43.8 °F | 67.7 °F | 2.51 in. |
| June | 47.8 °F | 73.5 °F | 1.32 in. |
| July | 51.4 °F | 83.1 °F | 0.26 in. |
| August | 51.3 °F | 83.7 °F | 0.35 in. |
| September | 47.7 °F | 77.9 °F | 1.29 in. |
| October | 42.3 °F | 64.8 °F | 3.21 in. |
| November | 38.0 °F | 52.9 °F | 6.69 in. |
| December | 34.5 °F | 46.4 °F | 8.95 in. |
| Annual | 41.9 °F | 63.8 °F | 46.59 in. |
| 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 : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |