Upton, Wyoming has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 32.1 °F (low) to 58.8 °F (high). Annual precipitation averages 16.2 Inches. Upton is located in USDA Plant Hardiness Zone 4b. 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 | 10.7 °F | 34.3 °F | 0.46 in. |
| February | 13.1 °F | 36.6 °F | 0.48 in. |
| March | 22.3 °F | 47.4 °F | 0.75 in. |
| April | 30.1 °F | 56.2 °F | 1.76 in. |
| May | 39.7 °F | 65.3 °F | 3.04 in. |
| June | 49.4 °F | 77.4 °F | 2.51 in. |
| July | 56.5 °F | 87.1 °F | 2.03 in. |
| August | 54.3 °F | 86.0 °F | 1.43 in. |
| September | 44.5 °F | 75.6 °F | 1.19 in. |
| October | 32.1 °F | 59.7 °F | 1.51 in. |
| November | 20.8 °F | 45.5 °F | 0.54 in. |
| December | 11.6 °F | 34.7 °F | 0.5 in. |
| Annual | 32.1 °F | 58.8 °F | 16.2 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |