Fisher, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -1.1 °C (low) to 9.8 °C (high). Annual precipitation averages 584.4 Millimeters. Fisher is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -19.3 °C | -9.5 °C | 16.26 mm |
| February | -17.4 °C | -7 °C | 15.24 mm |
| March | -9.3 °C | 0.4 °C | 22.1 mm |
| April | -0.9 °C | 10.4 °C | 30.73 mm |
| May | 6.1 °C | 18.6 °C | 72.64 mm |
| June | 12.7 °C | 23.9 °C | 101.85 mm |
| July | 14.6 °C | 26.4 °C | 87.12 mm |
| August | 12.9 °C | 26.2 °C | 74.42 mm |
| September | 7.9 °C | 20.8 °C | 69.85 mm |
| October | 1.1 °C | 12 °C | 52.07 mm |
| November | -7.1 °C | 2.2 °C | 21.59 mm |
| December | -14.7 °C | -6.3 °C | 20.57 mm |
| Annual | -1.1 °C | 9.8 °C | 584.44 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |