Minburn, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38.6 °F (low) to 59.2 °F (high). Annual precipitation averages 35.7 Inches. Minburn 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 | 11.1 °F | 28.9 °F | 0.93 in. |
| February | 15.1 °F | 33.5 °F | 1.15 in. |
| March | 26.5 °F | 46.7 °F | 2.04 in. |
| April | 37.6 °F | 60.6 °F | 3.65 in. |
| May | 49.9 °F | 71.3 °F | 4.94 in. |
| June | 60.4 °F | 80.7 °F | 5.34 in. |
| July | 64.0 °F | 84.6 °F | 4.29 in. |
| August | 61.3 °F | 82.4 °F | 4.09 in. |
| September | 52.5 °F | 76.6 °F | 3.39 in. |
| October | 40.0 °F | 63.5 °F | 2.66 in. |
| November | 27.8 °F | 47.6 °F | 1.82 in. |
| December | 17.1 °F | 34.2 °F | 1.36 in. |
| Annual | 38.6 °F | 59.2 °F | 35.66 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |