Bedford, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.5 °C (low) to 16.2 °C (high). Annual precipitation averages 966.7 Millimeters. Bedford 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 | -10.5 °C | 0.2 °C | 24.13 mm |
| February | -7.9 °C | 3.2 °C | 34.29 mm |
| March | -2.1 °C | 10.2 °C | 57.91 mm |
| April | 3.8 °C | 16.8 °C | 95.25 mm |
| May | 10.4 °C | 22.4 °C | 133.86 mm |
| June | 16.1 °C | 27.5 °C | 140.97 mm |
| July | 18.4 °C | 29.8 °C | 118.36 mm |
| August | 17.1 °C | 28.9 °C | 108.97 mm |
| September | 12 °C | 25.1 °C | 87.38 mm |
| October | 5.1 °C | 18.2 °C | 73.91 mm |
| November | -1.5 °C | 9.8 °C | 54.1 mm |
| December | -7.3 °C | 2.8 °C | 37.59 mm |
| Annual | 4.5 °C | 16.2 °C | 966.72 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 |