Fort Bridger, Wyoming has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 28 °F (low) to 56.2 °F (high). Annual precipitation averages 10.5 Inches. 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 | 9.5 °F | 31.8 °F | 0.53 in. |
| February | 11.2 °F | 34.0 °F | 0.55 in. |
| March | 20.0 °F | 44.2 °F | 0.69 in. |
| April | 26.5 °F | 53.8 °F | 1.08 in. |
| May | 34.6 °F | 63.7 °F | 1.38 in. |
| June | 41.8 °F | 75.0 °F | 0.95 in. |
| July | 48.8 °F | 83.7 °F | 0.89 in. |
| August | 46.8 °F | 82.1 °F | 0.82 in. |
| September | 38.6 °F | 72.6 °F | 1.18 in. |
| October | 28.8 °F | 58.6 °F | 1.03 in. |
| November | 18.7 °F | 43.0 °F | 0.79 in. |
| December | 10.2 °F | 32.2 °F | 0.61 in. |
| Annual | 28 °F | 56.2 °F | 10.5 in. |
| 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 : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |