Sheridan, Wyoming has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.6 °C (low) to 15.2 °C (high). Annual precipitation averages 413 Millimeters. Sheridan is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.9 °C | 2.1 °C | 18.03 mm |
| February | -10.7 °C | 3.3 °C | 19.3 mm |
| March | -5.7 °C | 9.3 °C | 33.27 mm |
| April | -1.2 °C | 13.7 °C | 46.74 mm |
| May | 3.9 °C | 18.7 °C | 77.98 mm |
| June | 8.9 °C | 24.7 °C | 50.04 mm |
| July | 12.2 °C | 30.5 °C | 33.02 mm |
| August | 10.6 °C | 29.9 °C | 17.53 mm |
| September | 5.8 °C | 24 °C | 39.37 mm |
| October | -0.7 °C | 15.6 °C | 41.4 mm |
| November | -6.6 °C | 8.2 °C | 23.11 mm |
| December | -11.3 °C | 2.4 °C | 13.21 mm |
| Annual | -0.6 °C | 15.2 °C | 413 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |