Sheldon, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.1 °C (low) to 13.8 °C (high). Annual precipitation averages 776.7 Millimeters. Sheldon 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -13.7 °C | -3.7 °C | 20.83 mm |
| February | -11.3 °C | -1.2 °C | 22.86 mm |
| March | -4.9 °C | 6.1 °C | 45.72 mm |
| April | 1.4 °C | 14.3 °C | 81.28 mm |
| May | 8.7 °C | 21.2 °C | 104.14 mm |
| June | 14.8 °C | 26.8 °C | 118.36 mm |
| July | 16.6 °C | 28.4 °C | 89.15 mm |
| August | 15.2 °C | 27.2 °C | 86.11 mm |
| September | 10.1 °C | 23.7 °C | 83.06 mm |
| October | 2.9 °C | 16.3 °C | 59.69 mm |
| November | -4.3 °C | 6.8 °C | 37.59 mm |
| December | -10.4 °C | -0.9 °C | 27.94 mm |
| Annual | 2.1 °C | 13.8 °C | 776.73 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |