Klemme, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.1 °C (low) to 13.2 °C (high). Annual precipitation averages 885.7 Millimeters. Klemme 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 | -13.8 °C | -4.3 °C | 21.84 mm |
| February | -11.4 °C | -1.7 °C | 25.4 mm |
| March | -4.7 °C | 5.3 °C | 52.07 mm |
| April | 1.7 °C | 13.8 °C | 97.79 mm |
| May | 8.7 °C | 20.6 °C | 125.48 mm |
| June | 14.7 °C | 26.1 °C | 137.92 mm |
| July | 16.4 °C | 27.8 °C | 108.71 mm |
| August | 14.8 °C | 26.5 °C | 101.35 mm |
| September | 9.9 °C | 23.1 °C | 79.5 mm |
| October | 3.1 °C | 15.7 °C | 60.2 mm |
| November | -3.7 °C | 6.4 °C | 42.42 mm |
| December | -10.1 °C | -1.2 °C | 33.02 mm |
| Annual | 2.1 °C | 13.2 °C | 885.7 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 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |