Moorhead, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.4 °C (low) to 15.6 °C (high). Annual precipitation averages 816.9 Millimeters. Moorhead 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.7 °C | -1.2 °C | 17.02 mm |
| February | -9.4 °C | 1.7 °C | 21.59 mm |
| March | -3.3 °C | 9 °C | 43.43 mm |
| April | 2.7 °C | 16.4 °C | 88.14 mm |
| May | 9.6 °C | 22.3 °C | 115.32 mm |
| June | 15.5 °C | 27.8 °C | 122.17 mm |
| July | 17.7 °C | 29.7 °C | 97.03 mm |
| August | 16.1 °C | 28.4 °C | 107.19 mm |
| September | 11 °C | 25.1 °C | 81.79 mm |
| October | 4.1 °C | 18 °C | 58.93 mm |
| November | -3.2 °C | 8.9 °C | 35.05 mm |
| December | -8.8 °C | 1.4 °C | 29.21 mm |
| Annual | 3.4 °C | 15.6 °C | 816.87 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 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |