Encampment, Wyoming has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -2.7 °C (low) to 12.8 °C (high). Annual precipitation averages 341.4 Millimeters. Encampment is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep.1 - Sep. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.2 °C | 0.1 °C | 32.51 mm |
| February | -11.1 °C | 1.4 °C | 25.65 mm |
| March | -7.1 °C | 6.3 °C | 25.91 mm |
| April | -3.7 °C | 11.3 °C | 34.8 mm |
| May | 0.8 °C | 16.9 °C | 38.61 mm |
| June | 5.1 °C | 23.2 °C | 24.64 mm |
| July | 8.4 °C | 27.2 °C | 23.37 mm |
| August | 7.2 °C | 26.2 °C | 28.45 mm |
| September | 2.8 °C | 21.4 °C | 25.91 mm |
| October | -2.6 °C | 13.8 °C | 28.96 mm |
| November | -7.5 °C | 5.8 °C | 22.61 mm |
| December | -12.1 °C | 0.2 °C | 29.97 mm |
| Annual | -2.7 °C | 12.8 °C | 341.39 mm |
| Average First Frost Date | Sep.1 - Sep. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |