Wheeler, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 44.6 °F (low) to 58.4 °F (high). Annual precipitation averages 93.5 Inches. Wheeler is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 39.0 °F | 50.0 °F | 13.97 in. |
| February | 38.4 °F | 51.3 °F | 9.54 in. |
| March | 39.4 °F | 53.1 °F | 10.66 in. |
| April | 41.7 °F | 56.3 °F | 7.95 in. |
| May | 45.8 °F | 60.2 °F | 4.57 in. |
| June | 49.8 °F | 63.4 °F | 3.63 in. |
| July | 52.6 °F | 66.9 °F | 1.06 in. |
| August | 52.8 °F | 68.1 °F | 1.72 in. |
| September | 50.1 °F | 67.3 °F | 3.36 in. |
| October | 45.7 °F | 61.1 °F | 8.19 in. |
| November | 41.7 °F | 54.0 °F | 14.33 in. |
| December | 38.6 °F | 49.3 °F | 14.53 in. |
| Annual | 44.6 °F | 58.4 °F | 93.51 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |