Homer, Minnesota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.2 °C (low) to 13.7 °C (high). Annual precipitation averages 927.6 Millimeters. Homer is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.8 °C | -3.3 °C | 30.73 mm |
| February | -10.9 °C | -0.7 °C | 28.96 mm |
| March | -4.3 °C | 6.2 °C | 50.04 mm |
| April | 2.8 °C | 14.3 °C | 99.06 mm |
| May | 9.3 °C | 21.1 °C | 115.57 mm |
| June | 15.1 °C | 26.3 °C | 123.7 mm |
| July | 17.3 °C | 28.4 °C | 108.2 mm |
| August | 16.2 °C | 27.3 °C | 118.11 mm |
| September | 11.7 °C | 23.2 °C | 101.35 mm |
| October | 4.8 °C | 15.7 °C | 69.85 mm |
| November | -1.9 °C | 6.8 °C | 47.5 mm |
| December | -8.7 °C | -0.4 °C | 34.54 mm |
| Annual | 3.2 °C | 13.7 °C | 927.61 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |