Ihlen, Minnesota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 1.3 °C (low) to 12.5 °C (high). Annual precipitation averages 719.3 Millimeters. Ihlen is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.6 °C | -4.8 °C | 15.49 mm |
| February | -12.6 °C | -2.2 °C | 19.3 mm |
| March | -6.1 °C | 4.5 °C | 35.81 mm |
| April | 0.7 °C | 12.8 °C | 73.66 mm |
| May | 7.8 °C | 19.7 °C | 97.79 mm |
| June | 14.1 °C | 25.4 °C | 109.22 mm |
| July | 16.2 °C | 27.8 °C | 93.22 mm |
| August | 14.6 °C | 26.4 °C | 84.07 mm |
| September | 9.7 °C | 22.7 °C | 83.06 mm |
| October | 2.3 °C | 14.8 °C | 56.39 mm |
| November | -5.1 °C | 5.6 °C | 28.96 mm |
| December | -11.4 °C | -2.3 °C | 22.35 mm |
| Annual | 1.3 °C | 12.5 °C | 719.32 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |