Bennett, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4 °C (low) to 15.1 °C (high). Annual precipitation averages 961.4 Millimeters. Bennett is located in USDA Plant Hardiness Zone 5b. 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 | -10.8 °C | -1.6 °C | 35.05 mm |
| February | -8.8 °C | 0.9 °C | 40.89 mm |
| March | -2.7 °C | 8.2 °C | 60.71 mm |
| April | 3.4 °C | 15.8 °C | 95.25 mm |
| May | 10.1 °C | 21.9 °C | 118.11 mm |
| June | 15.6 °C | 27.1 °C | 127.25 mm |
| July | 17.5 °C | 28.8 °C | 108.46 mm |
| August | 16.2 °C | 27.8 °C | 106.43 mm |
| September | 11.4 °C | 24.7 °C | 92.2 mm |
| October | 4.8 °C | 17.3 °C | 75.44 mm |
| November | -1.7 °C | 8.8 °C | 56.9 mm |
| December | -7.4 °C | 1.4 °C | 44.7 mm |
| Annual | 4 °C | 15.1 °C | 961.39 mm |
| 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 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |