Sherrill, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 37.9 °F (low) to 56.6 °F (high). Annual precipitation averages 38.4 Inches. Sherrill is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 10.4 °F | 26.4 °F | 1.27 in. |
| February | 13.9 °F | 30.8 °F | 1.43 in. |
| March | 25.5 °F | 43.6 °F | 2.06 in. |
| April | 36.8 °F | 57.4 °F | 3.83 in. |
| May | 48.5 °F | 69.2 °F | 4.54 in. |
| June | 58.8 °F | 78.8 °F | 5.75 in. |
| July | 62.5 °F | 82.0 °F | 4.89 in. |
| August | 60.4 °F | 80.2 °F | 3.98 in. |
| September | 52.0 °F | 73.3 °F | 3.81 in. |
| October | 40.0 °F | 60.4 °F | 2.89 in. |
| November | 28.3 °F | 45.0 °F | 2.23 in. |
| December | 17.2 °F | 32.2 °F | 1.69 in. |
| Annual | 37.9 °F | 56.6 °F | 38.37 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |