Minden, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 39.3 °F (low) to 60.4 °F (high). Annual precipitation averages 34 Inches. 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 | 12.3 °F | 30.9 °F | 0.76 in. |
| February | 16.3 °F | 35.7 °F | 1.01 in. |
| March | 27.1 °F | 48.8 °F | 1.83 in. |
| April | 38.1 °F | 61.7 °F | 3.47 in. |
| May | 50.5 °F | 72.1 °F | 5.18 in. |
| June | 61.1 °F | 81.9 °F | 5.1 in. |
| July | 64.8 °F | 85.3 °F | 3.79 in. |
| August | 62.2 °F | 83.3 °F | 4.06 in. |
| September | 52.9 °F | 77.2 °F | 3.26 in. |
| October | 40.6 °F | 64.4 °F | 2.66 in. |
| November | 27.9 °F | 48.3 °F | 1.51 in. |
| December | 17.9 °F | 35.5 °F | 1.32 in. |
| Annual | 39.3 °F | 60.4 °F | 33.95 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |