Mineola, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.1 °F (low) to 61.5 °F (high). Annual precipitation averages 33.7 Inches. Mineola is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 13.3 °F | 32.3 °F | 0.79 in. |
| February | 17.2 °F | 37.3 °F | 1.0 in. |
| March | 28.0 °F | 50.3 °F | 1.81 in. |
| April | 38.8 °F | 62.7 °F | 3.41 in. |
| May | 51.0 °F | 72.9 °F | 5.26 in. |
| June | 61.6 °F | 82.8 °F | 5.12 in. |
| July | 65.9 °F | 86.1 °F | 3.74 in. |
| August | 63.2 °F | 84.6 °F | 3.88 in. |
| September | 53.6 °F | 78.0 °F | 3.19 in. |
| October | 41.1 °F | 65.2 °F | 2.67 in. |
| November | 28.4 °F | 49.4 °F | 1.53 in. |
| December | 18.5 °F | 36.8 °F | 1.27 in. |
| Annual | 40.1 °F | 61.5 °F | 33.67 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |