Sheridan, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 6.1 °C (low) to 17.4 °C (high). Annual precipitation averages 1164.6 Millimeters. 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 | 2 °C | 8.3 °C | 187.2 mm |
| February | 2.1 °C | 10.4 °C | 136.65 mm |
| March | 3.1 °C | 12.9 °C | 126.75 mm |
| April | 4.6 °C | 15.9 °C | 91.69 mm |
| May | 7.3 °C | 19.9 °C | 54.61 mm |
| June | 9.6 °C | 22.9 °C | 31.75 mm |
| July | 11.6 °C | 28.1 °C | 6.86 mm |
| August | 11.6 °C | 28.4 °C | 9.14 mm |
| September | 9.7 °C | 25 °C | 35.81 mm |
| October | 6.6 °C | 17.8 °C | 89.15 mm |
| November | 3.8 °C | 11.6 °C | 178.31 mm |
| December | 1.6 °C | 7.9 °C | 216.66 mm |
| Annual | 6.1 °C | 17.4 °C | 1164.58 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 | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |