Mendon, Utah has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 34.9 °F (low) to 60.3 °F (high). Annual precipitation averages 17.1 Inches. 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 | 15.3 °F | 33.0 °F | 1.86 in. |
| February | 18.9 °F | 37.9 °F | 1.49 in. |
| March | 28.1 °F | 49.7 °F | 1.82 in. |
| April | 34.2 °F | 58.4 °F | 1.84 in. |
| May | 41.6 °F | 67.9 °F | 2.19 in. |
| June | 48.4 °F | 79.1 °F | 1.09 in. |
| July | 56.2 °F | 89.2 °F | 0.58 in. |
| August | 54.5 °F | 87.9 °F | 0.67 in. |
| September | 45.3 °F | 77.2 °F | 1.25 in. |
| October | 34.3 °F | 62.6 °F | 1.6 in. |
| November | 25.4 °F | 47.0 °F | 1.23 in. |
| December | 16.8 °F | 34.2 °F | 1.49 in. |
| Annual | 34.9 °F | 60.3 °F | 17.11 in. |
| 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 : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |