Sheridan, Wyoming has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 31 °F (low) to 59.4 °F (high). Annual precipitation averages 16.3 Inches. 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 | 10.6 °F | 35.7 °F | 0.71 in. |
| February | 12.8 °F | 38.0 °F | 0.76 in. |
| March | 21.8 °F | 48.7 °F | 1.31 in. |
| April | 29.8 °F | 56.7 °F | 1.84 in. |
| May | 39.0 °F | 65.6 °F | 3.07 in. |
| June | 48.1 °F | 76.4 °F | 1.97 in. |
| July | 54.0 °F | 86.9 °F | 1.3 in. |
| August | 51.1 °F | 85.9 °F | 0.69 in. |
| September | 42.4 °F | 75.2 °F | 1.55 in. |
| October | 30.8 °F | 60.1 °F | 1.63 in. |
| November | 20.1 °F | 46.8 °F | 0.91 in. |
| December | 11.6 °F | 36.4 °F | 0.52 in. |
| Annual | 31 °F | 59.4 °F | 16.26 in. |
| 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 : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |