Little America, Wyoming has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -1.9 °C (low) to 14.2 °C (high). Annual precipitation averages 223 Millimeters. Little America is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -13.1 °C | 0.6 °C | 11.68 mm |
| February | -11.7 °C | 2.2 °C | 10.92 mm |
| March | -6.3 °C | 7.9 °C | 16 mm |
| April | -2.6 °C | 12.8 °C | 23.88 mm |
| May | 2.1 °C | 18.3 °C | 36.83 mm |
| June | 6.3 °C | 24.7 °C | 24.13 mm |
| July | 10.1 °C | 29.6 °C | 13.46 mm |
| August | 9.2 °C | 28.5 °C | 16.76 mm |
| September | 4.2 °C | 23.2 °C | 24.13 mm |
| October | -1.5 °C | 15.2 °C | 22.1 mm |
| November | -7.2 °C | 6.7 °C | 12.95 mm |
| December | -12.7 °C | 0.6 °C | 10.16 mm |
| Annual | -1.9 °C | 14.2 °C | 223 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| 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 | BSk - Cold Semi-Arid Climate |