Kelliher, Minnesota has a Humid Continental Mild Summer With Dry Winters climate (Köppen classification: Dwb). Average annual temperatures range from 28.2 °F (low) to 49.7 °F (high). Annual precipitation averages 25.8 Inches. Kelliher is located in USDA Plant Hardiness Zone 3b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep.1 - Sep. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.8 °F | 17.1 °F | 0.68 in. |
| February | -1.4 °F | 22.6 °F | 0.64 in. |
| March | 13.1 °F | 36.5 °F | 0.95 in. |
| April | 27.6 °F | 50.3 °F | 1.64 in. |
| May | 40.7 °F | 64.6 °F | 2.89 in. |
| June | 51.2 °F | 72.9 °F | 4.24 in. |
| July | 55.2 °F | 77.4 °F | 3.95 in. |
| August | 52.7 °F | 76.2 °F | 3.28 in. |
| September | 44.5 °F | 67.6 °F | 2.93 in. |
| October | 33.5 °F | 52.6 °F | 2.53 in. |
| November | 19.7 °F | 35.5 °F | 1.19 in. |
| December | 5.1 °F | 22.6 °F | 0.85 in. |
| Annual | 28.2 °F | 49.7 °F | 25.77 in. |
| Average First Frost Date | Sep.1 - Sep. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 3b : -35°F to -30°F |
| Plant Hardiness Zone - 2012 | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dwb - Humid Continental Mild Summer With Dry Winters |