Fergus Falls, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 32.6 °F (low) to 51.7 °F (high). Annual precipitation averages 25.6 Inches. Fergus Falls is located in USDA Plant Hardiness Zone 4a. 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 | 0.7 °F | 18.3 °F | 0.7 in. |
| February | 4.0 °F | 22.7 °F | 0.64 in. |
| March | 18.0 °F | 36.1 °F | 1.04 in. |
| April | 32.4 °F | 52.6 °F | 1.94 in. |
| May | 45.3 °F | 66.3 °F | 3.26 in. |
| June | 56.3 °F | 75.8 °F | 4.32 in. |
| July | 60.6 °F | 80.2 °F | 3.63 in. |
| August | 58.1 °F | 78.7 °F | 3.14 in. |
| September | 49.2 °F | 70.9 °F | 2.79 in. |
| October | 36.0 °F | 55.4 °F | 2.5 in. |
| November | 22.1 °F | 38.4 °F | 0.92 in. |
| December | 8.5 °F | 24.5 °F | 0.7 in. |
| Annual | 32.6 °F | 51.7 °F | 25.58 in. |
| 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 4a : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |