Fort Bridger, Wyoming has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -2.3 °C (low) to 13.5 °C (high). Annual precipitation averages 266.7 Millimeters. Fort Bridger is located in USDA Plant Hardiness Zone 5a. 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 | -12.5 °C | -0.1 °C | 13.46 mm |
| February | -11.6 °C | 1.1 °C | 13.97 mm |
| March | -6.7 °C | 6.8 °C | 17.53 mm |
| April | -3.1 °C | 12.1 °C | 27.43 mm |
| May | 1.4 °C | 17.6 °C | 35.05 mm |
| June | 5.4 °C | 23.9 °C | 24.13 mm |
| July | 9.3 °C | 28.7 °C | 22.61 mm |
| August | 8.2 °C | 27.8 °C | 20.83 mm |
| September | 3.7 °C | 22.6 °C | 29.97 mm |
| October | -1.8 °C | 14.8 °C | 26.16 mm |
| November | -7.4 °C | 6.1 °C | 20.07 mm |
| December | -12.1 °C | 0.1 °C | 15.49 mm |
| Annual | -2.3 °C | 13.5 °C | 266.7 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 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |