Laramie, Wyoming has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -1.4 °C (low) to 13.1 °C (high). Annual precipitation averages 332.5 Millimeters. Laramie is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Sep.1 - Sep. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.9 °C | 1.5 °C | 11.68 mm |
| February | -10.2 °C | 2.2 °C | 11.18 mm |
| March | -6.3 °C | 7 °C | 19.81 mm |
| April | -3.1 °C | 10.6 °C | 39.37 mm |
| May | 2.1 °C | 16.2 °C | 51.05 mm |
| June | 6.9 °C | 23.1 °C | 39.88 mm |
| July | 10.4 °C | 27.2 °C | 40.89 mm |
| August | 9.1 °C | 26.1 °C | 30.73 mm |
| September | 4.4 °C | 21.4 °C | 33.53 mm |
| October | -1.4 °C | 13.9 °C | 26.42 mm |
| November | -6.6 °C | 6.6 °C | 16.51 mm |
| December | -10.9 °C | 1.3 °C | 11.43 mm |
| Annual | -1.4 °C | 13.1 °C | 332.48 mm |
| Average First Frost Date | Sep.1 - Sep. 10 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°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 |