Howard Lake, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.6 °C (low) to 12.1 °C (high). Annual precipitation averages 787.4 Millimeters. Howard Lake 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 | -15.2 °C | -5.7 °C | 19.3 mm |
| February | -13.6 °C | -3.2 °C | 21.08 mm |
| March | -6.3 °C | 3.8 °C | 38.35 mm |
| April | 1.1 °C | 12.5 °C | 70.1 mm |
| May | 8.3 °C | 19.8 °C | 105.16 mm |
| June | 14.3 °C | 25.2 °C | 120.9 mm |
| July | 16.6 °C | 27.6 °C | 97.03 mm |
| August | 15.1 °C | 26.3 °C | 109.73 mm |
| September | 10.4 °C | 22.3 °C | 80.77 mm |
| October | 3.2 °C | 14.1 °C | 61.47 mm |
| November | -3.9 °C | 5 °C | 36.32 mm |
| December | -11.2 °C | -2.7 °C | 27.18 mm |
| Annual | 1.6 °C | 12.1 °C | 787.39 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 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |