Farwell, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 32.9 °F (low) to 52.4 °F (high). Annual precipitation averages 26.3 Inches. Farwell 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 | 1.9 °F | 19.5 °F | 0.65 in. |
| February | 5.4 °F | 24.4 °F | 0.63 in. |
| March | 18.2 °F | 36.7 °F | 1.16 in. |
| April | 32.2 °F | 53.3 °F | 2.18 in. |
| May | 45.4 °F | 67.0 °F | 3.16 in. |
| June | 56.0 °F | 76.4 °F | 4.25 in. |
| July | 60.7 °F | 80.9 °F | 3.95 in. |
| August | 57.9 °F | 79.0 °F | 3.38 in. |
| September | 49.2 °F | 71.3 °F | 2.69 in. |
| October | 36.0 °F | 56.2 °F | 2.48 in. |
| November | 22.6 °F | 38.9 °F | 1.04 in. |
| December | 9.6 °F | 25.3 °F | 0.75 in. |
| Annual | 32.9 °F | 52.4 °F | 26.32 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 4b : -25°F to -20°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 |