Lester Prairie, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.7 °C (low) to 12.3 °C (high). Annual precipitation averages 799.6 Millimeters. Lester Prairie 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 | -15.1 °C | -5.5 °C | 20.83 mm |
| February | -13.3 °C | -2.9 °C | 20.57 mm |
| March | -6.1 °C | 4.1 °C | 38.35 mm |
| April | 1.4 °C | 12.8 °C | 71.63 mm |
| May | 8.5 °C | 20 °C | 108.2 mm |
| June | 14.5 °C | 25.4 °C | 125.22 mm |
| July | 16.7 °C | 27.9 °C | 95.25 mm |
| August | 15.3 °C | 26.5 °C | 114.05 mm |
| September | 10.6 °C | 22.6 °C | 79.5 mm |
| October | 3.3 °C | 14.4 °C | 59.69 mm |
| November | -3.8 °C | 5.3 °C | 37.34 mm |
| December | -11.1 °C | -2.5 °C | 28.96 mm |
| Annual | 1.7 °C | 12.3 °C | 799.59 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 |