Big Lake, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34.5 °F (low) to 54 °F (high). Annual precipitation averages 31.1 Inches. Big Lake 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 | 4.5 °F | 22.0 °F | 0.77 in. |
| February | 7.7 °F | 26.9 °F | 0.83 in. |
| March | 20.4 °F | 39.6 °F | 1.63 in. |
| April | 33.6 °F | 54.8 °F | 2.76 in. |
| May | 46.5 °F | 68.0 °F | 4.17 in. |
| June | 57.0 °F | 77.5 °F | 4.41 in. |
| July | 61.4 °F | 82.0 °F | 3.99 in. |
| August | 58.6 °F | 79.6 °F | 4.07 in. |
| September | 50.3 °F | 72.0 °F | 3.17 in. |
| October | 37.5 °F | 57.1 °F | 2.7 in. |
| November | 24.7 °F | 41.1 °F | 1.47 in. |
| December | 11.9 °F | 27.2 °F | 1.11 in. |
| Annual | 34.5 °F | 54 °F | 31.08 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 | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |