Sheridan, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 43 °F (low) to 63.4 °F (high). Annual precipitation averages 45.9 Inches. Sheridan 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 | 35.6 °F | 47.0 °F | 7.37 in. |
| February | 35.8 °F | 50.8 °F | 5.38 in. |
| March | 37.6 °F | 55.2 °F | 4.99 in. |
| April | 40.2 °F | 60.6 °F | 3.61 in. |
| May | 45.2 °F | 67.9 °F | 2.15 in. |
| June | 49.3 °F | 73.3 °F | 1.25 in. |
| July | 52.8 °F | 82.5 °F | 0.27 in. |
| August | 52.9 °F | 83.2 °F | 0.36 in. |
| September | 49.4 °F | 77.0 °F | 1.41 in. |
| October | 43.8 °F | 64.1 °F | 3.51 in. |
| November | 38.8 °F | 52.8 °F | 7.02 in. |
| December | 34.9 °F | 46.2 °F | 8.53 in. |
| Annual | 43 °F | 63.4 °F | 45.85 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 | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |