Ihlen, Minnesota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 34.3 °F (low) to 54.6 °F (high). Annual precipitation averages 28.3 Inches. 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 | 5.7 °F | 23.3 °F | 0.61 in. |
| February | 9.4 °F | 28.0 °F | 0.76 in. |
| March | 21.1 °F | 40.1 °F | 1.41 in. |
| April | 33.2 °F | 55.1 °F | 2.9 in. |
| May | 46.1 °F | 67.4 °F | 3.85 in. |
| June | 57.4 °F | 77.8 °F | 4.3 in. |
| July | 61.1 °F | 82.1 °F | 3.67 in. |
| August | 58.2 °F | 79.5 °F | 3.31 in. |
| September | 49.4 °F | 72.8 °F | 3.27 in. |
| October | 36.2 °F | 58.7 °F | 2.22 in. |
| November | 22.8 °F | 42.1 °F | 1.14 in. |
| December | 11.5 °F | 27.9 °F | 0.88 in. |
| Annual | 34.3 °F | 54.6 °F | 28.32 in. |
| 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 : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |