Mendon, Utah has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 1.6 °C (low) to 15.8 °C (high). Annual precipitation averages 434.6 Millimeters. Mendon 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 Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.3 °C | 0.6 °C | 47.24 mm |
| February | -7.3 °C | 3.3 °C | 37.85 mm |
| March | -2.2 °C | 9.8 °C | 46.23 mm |
| April | 1.2 °C | 14.7 °C | 46.74 mm |
| May | 5.3 °C | 19.9 °C | 55.63 mm |
| June | 9.1 °C | 26.2 °C | 27.69 mm |
| July | 13.4 °C | 31.8 °C | 14.73 mm |
| August | 12.5 °C | 31.1 °C | 17.02 mm |
| September | 7.4 °C | 25.1 °C | 31.75 mm |
| October | 1.3 °C | 17 °C | 40.64 mm |
| November | -3.7 °C | 8.3 °C | 31.24 mm |
| December | -8.4 °C | 1.2 °C | 37.85 mm |
| Annual | 1.6 °C | 15.8 °C | 434.61 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| 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 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |