Randolph, Utah has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 25.1 °F (low) to 54.7 °F (high). Annual precipitation averages 13.9 Inches. Randolph is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Sep.1 - Sep. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.9 °F | 28.9 °F | 1.07 in. |
| February | 7.6 °F | 32.0 °F | 0.99 in. |
| March | 17.6 °F | 42.5 °F | 0.98 in. |
| April | 25.0 °F | 52.6 °F | 1.29 in. |
| May | 32.6 °F | 62.1 °F | 1.8 in. |
| June | 39.3 °F | 73.1 °F | 1.19 in. |
| July | 45.4 °F | 82.5 °F | 0.82 in. |
| August | 43.4 °F | 80.8 °F | 1.15 in. |
| September | 34.8 °F | 71.4 °F | 1.33 in. |
| October | 25.5 °F | 57.7 °F | 1.22 in. |
| November | 16.6 °F | 42.6 °F | 1.05 in. |
| December | 7.2 °F | 30.2 °F | 1.03 in. |
| Annual | 25.1 °F | 54.7 °F | 13.92 in. |
| Average First Frost Date | Sep.1 - Sep. 10 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |