Kettle River, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 30 °F (low) to 51.2 °F (high). Annual precipitation averages 31.2 Inches. Kettle River 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 | 0.2 °F | 19.7 °F | 0.79 in. |
| February | 3.6 °F | 25.6 °F | 0.83 in. |
| March | 16.0 °F | 37.7 °F | 1.38 in. |
| April | 28.9 °F | 51.0 °F | 2.45 in. |
| May | 40.3 °F | 64.9 °F | 3.65 in. |
| June | 50.1 °F | 74.0 °F | 4.33 in. |
| July | 55.7 °F | 79.2 °F | 4.81 in. |
| August | 54.0 °F | 77.1 °F | 3.86 in. |
| September | 46.1 °F | 68.8 °F | 3.33 in. |
| October | 34.7 °F | 54.1 °F | 3.07 in. |
| November | 22.1 °F | 38.0 °F | 1.54 in. |
| December | 8.6 °F | 24.8 °F | 1.17 in. |
| Annual | 30 °F | 51.2 °F | 31.21 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 4a : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |