Hampton, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.4 °C (low) to 13.7 °C (high). Annual precipitation averages 949.2 Millimeters. Hampton 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 | -13.2 °C | -3.7 °C | 24.13 mm |
| February | -11 °C | -1.1 °C | 29.21 mm |
| March | -4.4 °C | 5.9 °C | 52.83 mm |
| April | 1.8 °C | 14.3 °C | 102.11 mm |
| May | 8.9 °C | 20.9 °C | 131.57 mm |
| June | 14.8 °C | 26.5 °C | 151.64 mm |
| July | 16.6 °C | 28.2 °C | 116.59 mm |
| August | 15.1 °C | 26.9 °C | 108.2 mm |
| September | 10.2 °C | 23.7 °C | 84.33 mm |
| October | 3.4 °C | 16.2 °C | 65.53 mm |
| November | -3.4 °C | 6.9 °C | 45.72 mm |
| December | -9.5 °C | -0.6 °C | 37.34 mm |
| Annual | 2.4 °C | 13.7 °C | 949.2 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 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |