Randolph, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 36.4 °F (low) to 55.8 °F (high). Annual precipitation averages 35.6 Inches. Randolph is located in USDA Plant Hardiness Zone 5a. 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 | 9.9 °F | 26.2 °F | 1.45 in. |
| February | 12.5 °F | 30.0 °F | 1.4 in. |
| March | 23.2 °F | 42.1 °F | 1.96 in. |
| April | 34.8 °F | 55.7 °F | 3.59 in. |
| May | 46.4 °F | 68.1 °F | 4.13 in. |
| June | 56.5 °F | 77.7 °F | 5.06 in. |
| July | 60.5 °F | 81.4 °F | 4.15 in. |
| August | 58.6 °F | 79.5 °F | 3.83 in. |
| September | 50.6 °F | 72.9 °F | 3.35 in. |
| October | 39.0 °F | 59.5 °F | 2.9 in. |
| November | 27.7 °F | 44.6 °F | 2.07 in. |
| December | 16.7 °F | 31.6 °F | 1.68 in. |
| Annual | 36.4 °F | 55.8 °F | 35.57 in. |
| 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 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |