Ulen, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 31.3 °F (low) to 51 °F (high). Annual precipitation averages 25 Inches. Ulen is located in USDA Plant Hardiness Zone 4a. 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 | -0.5 °F | 16.5 °F | 0.72 in. |
| February | 2.4 °F | 21.4 °F | 0.65 in. |
| March | 16.8 °F | 34.5 °F | 0.98 in. |
| April | 31.2 °F | 51.8 °F | 1.5 in. |
| May | 43.8 °F | 66.6 °F | 3.15 in. |
| June | 55.0 °F | 76.0 °F | 4.38 in. |
| July | 59.1 °F | 80.2 °F | 3.55 in. |
| August | 56.4 °F | 78.9 °F | 2.92 in. |
| September | 47.9 °F | 70.4 °F | 2.97 in. |
| October | 35.1 °F | 54.7 °F | 2.45 in. |
| November | 21.0 °F | 37.2 °F | 0.89 in. |
| December | 7.5 °F | 23.4 °F | 0.83 in. |
| Annual | 31.3 °F | 51 °F | 24.99 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 4a : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |