Clearwater, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1 °C (low) to 11.9 °C (high). Annual precipitation averages 765.8 Millimeters. Clearwater 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 Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -15.8 °C | -6 °C | 18.03 mm |
| February | -14.1 °C | -3.3 °C | 20.07 mm |
| March | -6.9 °C | 3.8 °C | 38.86 mm |
| April | 0.6 °C | 12.2 °C | 68.33 mm |
| May | 7.8 °C | 19.7 °C | 102.87 mm |
| June | 13.8 °C | 25 °C | 109.47 mm |
| July | 16 °C | 27.3 °C | 97.03 mm |
| August | 14.4 °C | 26.1 °C | 101.85 mm |
| September | 9.8 °C | 21.9 °C | 78.49 mm |
| October | 2.7 °C | 13.8 °C | 68.58 mm |
| November | -4.4 °C | 4.7 °C | 36.58 mm |
| December | -11.6 °C | -3 °C | 25.65 mm |
| Annual | 1 °C | 11.9 °C | 765.81 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |