McIntire, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 1.6 °C (low) to 12.4 °C (high). Annual precipitation averages 922.8 Millimeters. McIntire is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.3 °C | -5.1 °C | 24.64 mm |
| February | -12.2 °C | -2.6 °C | 26.42 mm |
| March | -5.5 °C | 4.4 °C | 46.23 mm |
| April | 1.2 °C | 12.9 °C | 96.77 mm |
| May | 7.9 °C | 19.8 °C | 121.16 mm |
| June | 13.8 °C | 25.2 °C | 147.32 mm |
| July | 15.7 °C | 27 °C | 114.05 mm |
| August | 14.3 °C | 25.8 °C | 106.68 mm |
| September | 9.6 °C | 22.4 °C | 92.2 mm |
| October | 2.8 °C | 14.8 °C | 69.6 mm |
| November | -4 °C | 5.7 °C | 42.67 mm |
| December | -10.4 °C | -1.8 °C | 35.05 mm |
| Annual | 1.6 °C | 12.4 °C | 922.79 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |