Mondamin, 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 61 °F (high). Annual precipitation averages 32.2 Inches. Mondamin 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 | 11.6 °F | 31.1 °F | 0.72 in. |
| February | 15.4 °F | 35.8 °F | 0.92 in. |
| March | 26.6 °F | 49.1 °F | 1.78 in. |
| April | 37.5 °F | 62.4 °F | 3.34 in. |
| May | 50.1 °F | 72.9 °F | 4.58 in. |
| June | 60.8 °F | 83.0 °F | 4.88 in. |
| July | 64.6 °F | 86.3 °F | 3.5 in. |
| August | 61.7 °F | 84.1 °F | 3.98 in. |
| September | 52.4 °F | 78.0 °F | 3.46 in. |
| October | 39.5 °F | 64.9 °F | 2.39 in. |
| November | 26.9 °F | 49.3 °F | 1.45 in. |
| December | 16.6 °F | 35.5 °F | 1.22 in. |
| Annual | 38.6 °F | 61 °F | 32.22 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 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |