Glenwood, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 32.4 °F (low) to 53.7 °F (high). Annual precipitation averages 26.6 Inches. Glenwood is located in USDA Plant Hardiness Zone 4b. 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 | 1.8 °F | 20.6 °F | 0.58 in. |
| February | 5.6 °F | 25.4 °F | 0.55 in. |
| March | 18.8 °F | 37.9 °F | 1.13 in. |
| April | 31.9 °F | 55.2 °F | 2.18 in. |
| May | 44.8 °F | 68.4 °F | 3.1 in. |
| June | 55.4 °F | 77.8 °F | 4.4 in. |
| July | 59.5 °F | 82.3 °F | 4.01 in. |
| August | 56.6 °F | 80.5 °F | 3.67 in. |
| September | 48.2 °F | 72.7 °F | 2.74 in. |
| October | 35.4 °F | 57.8 °F | 2.5 in. |
| November | 22.0 °F | 40.0 °F | 1.08 in. |
| December | 9.0 °F | 26.2 °F | 0.67 in. |
| Annual | 32.4 °F | 53.7 °F | 26.61 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |