Le Roy, Minnesota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 34.6 °F (low) to 54 °F (high). Annual precipitation averages 35.7 Inches. Le Roy 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 | 6.0 °F | 22.7 °F | 0.95 in. |
| February | 9.9 °F | 27.1 °F | 0.99 in. |
| March | 21.8 °F | 39.6 °F | 1.76 in. |
| April | 33.8 °F | 54.9 °F | 3.78 in. |
| May | 46.1 °F | 67.3 °F | 4.59 in. |
| June | 56.7 °F | 77.1 °F | 5.77 in. |
| July | 60.0 °F | 80.4 °F | 4.32 in. |
| August | 57.5 °F | 78.3 °F | 4.21 in. |
| September | 49.1 °F | 72.0 °F | 3.56 in. |
| October | 36.8 °F | 58.4 °F | 2.74 in. |
| November | 24.7 °F | 42.1 °F | 1.68 in. |
| December | 13.1 °F | 28.4 °F | 1.33 in. |
| Annual | 34.6 °F | 54 °F | 35.68 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 | Dfa - Humid Continental Hot Summers With Year Around Precipitation |