Long Lake, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.2 °F (low) to 54.3 °F (high). Annual precipitation averages 32.2 Inches. Long 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 | 5.8 °F | 22.5 °F | 0.85 in. |
| February | 9.1 °F | 27.2 °F | 0.88 in. |
| March | 21.6 °F | 39.8 °F | 1.53 in. |
| April | 35.2 °F | 54.8 °F | 2.81 in. |
| May | 48.3 °F | 67.9 °F | 4.34 in. |
| June | 58.9 °F | 77.6 °F | 4.74 in. |
| July | 63.1 °F | 82.1 °F | 4.11 in. |
| August | 61.0 °F | 79.9 °F | 4.28 in. |
| September | 52.7 °F | 72.3 °F | 3.41 in. |
| October | 39.6 °F | 57.7 °F | 2.49 in. |
| November | 26.6 °F | 41.7 °F | 1.47 in. |
| December | 12.9 °F | 27.5 °F | 1.32 in. |
| Annual | 36.2 °F | 54.3 °F | 32.23 in. |
| 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 : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |