Byron, Wyoming has a Cold Desert Climate climate (Köppen classification: BWk). Average annual temperatures range from -0.1 °C (low) to 15.1 °C (high). Annual precipitation averages 197.4 Millimeters. 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 | -12.9 °C | 0.3 °C | 7.11 mm |
| February | -10.7 °C | 3 °C | 7.62 mm |
| March | -4.9 °C | 9.9 °C | 8.13 mm |
| April | -0.3 °C | 14.7 °C | 20.07 mm |
| May | 5.1 °C | 19.8 °C | 31.5 mm |
| June | 9.7 °C | 25.7 °C | 34.29 mm |
| July | 13.1 °C | 31 °C | 22.1 mm |
| August | 11.6 °C | 30 °C | 10.67 mm |
| September | 6.3 °C | 23.8 °C | 22.86 mm |
| October | 0.1 °C | 15.2 °C | 19.3 mm |
| November | -6.4 °C | 6.9 °C | 7.62 mm |
| December | -11.7 °C | 1 °C | 6.1 mm |
| Annual | -0.1 °C | 15.1 °C | 197.37 mm |
| 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 : -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 | BWk - Cold Desert Climate |