Elk Mountain, Wyoming has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -1.1 °C (low) to 12.5 °C (high). Annual precipitation averages 436.4 Millimeters. Elk Mountain 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 Aug. 11 - Aug. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.6 °C | 0.5 °C | 25.4 mm |
| February | -9.4 °C | 1.2 °C | 22.35 mm |
| March | -5.4 °C | 5.8 °C | 30.73 mm |
| April | -2.8 °C | 10.1 °C | 51.05 mm |
| May | 1.7 °C | 16.1 °C | 57.4 mm |
| June | 6.2 °C | 22.7 °C | 36.32 mm |
| July | 9.4 °C | 27.2 °C | 28.45 mm |
| August | 8.4 °C | 26 °C | 29.46 mm |
| September | 4.3 °C | 21 °C | 31.24 mm |
| October | -0.8 °C | 13.1 °C | 46.74 mm |
| November | -5.6 °C | 5.6 °C | 41.91 mm |
| December | -9.4 °C | 0.3 °C | 35.31 mm |
| Annual | -1.1 °C | 12.5 °C | 436.36 mm |
| Average First Frost Date | Aug. 11 - Aug. 20 |
| 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 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |