Glenwood, Utah has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 0.9 °C (low) to 18.3 °C (high). Annual precipitation averages 225.3 Millimeters. Glenwood is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.9 °C | 4.4 °C | 13.97 mm |
| February | -6.3 °C | 7.7 °C | 14.48 mm |
| March | -3 °C | 13.1 °C | 20.32 mm |
| April | -0.3 °C | 17.2 °C | 19.81 mm |
| May | 3.9 °C | 22.4 °C | 25.65 mm |
| June | 8.3 °C | 28.8 °C | 12.7 mm |
| July | 12.7 °C | 32.7 °C | 14.99 mm |
| August | 11.7 °C | 31.4 °C | 20.83 mm |
| September | 6.4 °C | 26.9 °C | 20.83 mm |
| October | 0.3 °C | 19.6 °C | 27.69 mm |
| November | -5 °C | 11.2 °C | 15.75 mm |
| December | -9.2 °C | 4.4 °C | 18.29 mm |
| Annual | 0.9 °C | 18.3 °C | 225.31 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |