Byron, Wyoming has a Cold Desert Climate climate (Köppen classification: BWk). Average annual temperatures range from 31.8 °F (low) to 59.2 °F (high). Annual precipitation averages 7.8 Inches. Byron 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 Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 8.7 °F | 32.5 °F | 0.28 in. |
| February | 12.8 °F | 37.4 °F | 0.3 in. |
| March | 23.1 °F | 49.9 °F | 0.32 in. |
| April | 31.4 °F | 58.4 °F | 0.79 in. |
| May | 41.2 °F | 67.6 °F | 1.24 in. |
| June | 49.5 °F | 78.2 °F | 1.35 in. |
| July | 55.6 °F | 87.8 °F | 0.87 in. |
| August | 52.9 °F | 86.0 °F | 0.42 in. |
| September | 43.4 °F | 74.9 °F | 0.9 in. |
| October | 32.1 °F | 59.4 °F | 0.76 in. |
| November | 20.4 °F | 44.5 °F | 0.3 in. |
| December | 10.9 °F | 33.8 °F | 0.24 in. |
| Annual | 31.8 °F | 59.2 °F | 7.77 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BWk - Cold Desert Climate |