Harris, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.4 °C (low) to 12.2 °C (high). Annual precipitation averages 795.3 Millimeters. Harris 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 Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -16.3 °C | -5.3 °C | 19.3 mm |
| February | -14.3 °C | -2.3 °C | 19.81 mm |
| March | -7.4 °C | 4.7 °C | 37.85 mm |
| April | -0.2 °C | 12.6 °C | 71.12 mm |
| May | 6.8 °C | 19.9 °C | 99.31 mm |
| June | 12.4 °C | 25 °C | 112.52 mm |
| July | 15 °C | 27.4 °C | 108.71 mm |
| August | 13.6 °C | 26.3 °C | 101.85 mm |
| September | 9.1 °C | 21.9 °C | 83.57 mm |
| October | 2.3 °C | 14.1 °C | 72.9 mm |
| November | -4.7 °C | 5 °C | 40.64 mm |
| December | -11.9 °C | -2.5 °C | 27.69 mm |
| Annual | 0.4 °C | 12.2 °C | 795.27 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |