Cottonwood Heights, Utah has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.9 °C (low) to 17.7 °C (high). Annual precipitation averages 549.4 Millimeters. Cottonwood Heights is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.5 °C | 4.4 °C | 48.77 mm |
| February | -3.4 °C | 6.7 °C | 51.56 mm |
| March | 0.3 °C | 12.2 °C | 65.02 mm |
| April | 3.1 °C | 15.9 °C | 72.9 mm |
| May | 7.8 °C | 21.4 °C | 65.28 mm |
| June | 12.2 °C | 27.7 °C | 35.31 mm |
| July | 17.1 °C | 32.9 °C | 16.76 mm |
| August | 16.2 °C | 31.8 °C | 20.32 mm |
| September | 11.4 °C | 26.2 °C | 34.04 mm |
| October | 5.1 °C | 18.1 °C | 44.96 mm |
| November | -0.5 °C | 10.4 °C | 44.96 mm |
| December | -5.2 °C | 4.2 °C | 49.53 mm |
| Annual | 4.9 °C | 17.7 °C | 549.41 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |