Lonsdale, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34.8 °F (low) to 54.1 °F (high). Annual precipitation averages 33.3 Inches. Lonsdale 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 | 5.6 °F | 22.6 °F | 0.82 in. |
| February | 8.9 °F | 27.2 °F | 0.89 in. |
| March | 21.2 °F | 39.7 °F | 1.72 in. |
| April | 34.2 °F | 55.0 °F | 2.86 in. |
| May | 46.9 °F | 67.6 °F | 4.37 in. |
| June | 57.7 °F | 77.3 °F | 5.06 in. |
| July | 60.8 °F | 81.1 °F | 4.21 in. |
| August | 58.5 °F | 79.1 °F | 4.62 in. |
| September | 49.8 °F | 72.2 °F | 3.32 in. |
| October | 36.9 °F | 58.0 °F | 2.55 in. |
| November | 25.0 °F | 41.8 °F | 1.6 in. |
| December | 12.5 °F | 28.0 °F | 1.25 in. |
| Annual | 34.8 °F | 54.1 °F | 33.27 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 | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |