Minden, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.1 °C (low) to 15.8 °C (high). Annual precipitation averages 862.3 Millimeters. Minden 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 | -10.9 °C | -0.6 °C | 19.3 mm |
| February | -8.7 °C | 2.1 °C | 25.65 mm |
| March | -2.7 °C | 9.3 °C | 46.48 mm |
| April | 3.4 °C | 16.5 °C | 88.14 mm |
| May | 10.3 °C | 22.3 °C | 131.57 mm |
| June | 16.2 °C | 27.7 °C | 129.54 mm |
| July | 18.2 °C | 29.6 °C | 96.27 mm |
| August | 16.8 °C | 28.5 °C | 103.12 mm |
| September | 11.6 °C | 25.1 °C | 82.8 mm |
| October | 4.8 °C | 18 °C | 67.56 mm |
| November | -2.3 °C | 9.1 °C | 38.35 mm |
| December | -7.8 °C | 1.9 °C | 33.53 mm |
| Annual | 4.1 °C | 15.8 °C | 862.31 mm |
| 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 : -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 |