Farwell, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.1 °F (low) to 56.1 °F (high). Annual precipitation averages 34.5 Inches. Farwell is located in USDA Plant Hardiness Zone 5b. 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 | 12.9 °F | 28.6 °F | 2.21 in. |
| February | 12.9 °F | 31.4 °F | 1.71 in. |
| March | 20.7 °F | 41.8 °F | 2.11 in. |
| April | 31.9 °F | 55.0 °F | 3.56 in. |
| May | 43.8 °F | 68.0 °F | 3.69 in. |
| June | 53.6 °F | 77.5 °F | 3.52 in. |
| July | 57.1 °F | 81.6 °F | 3.07 in. |
| August | 55.2 °F | 79.6 °F | 3.5 in. |
| September | 47.3 °F | 72.4 °F | 2.87 in. |
| October | 37.2 °F | 58.6 °F | 3.48 in. |
| November | 28.3 °F | 45.1 °F | 2.61 in. |
| December | 19.9 °F | 33.9 °F | 2.13 in. |
| Annual | 35.1 °F | 56.1 °F | 34.46 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |