Clearwater, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33.8 °F (low) to 53.3 °F (high). Annual precipitation averages 30.2 Inches. 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 | 3.6 °F | 21.2 °F | 0.71 in. |
| February | 6.6 °F | 26.0 °F | 0.79 in. |
| March | 19.5 °F | 38.8 °F | 1.53 in. |
| April | 33.0 °F | 54.0 °F | 2.69 in. |
| May | 46.0 °F | 67.4 °F | 4.05 in. |
| June | 56.8 °F | 77.0 °F | 4.31 in. |
| July | 60.8 °F | 81.1 °F | 3.82 in. |
| August | 57.9 °F | 78.9 °F | 4.01 in. |
| September | 49.6 °F | 71.5 °F | 3.09 in. |
| October | 36.8 °F | 56.8 °F | 2.7 in. |
| November | 24.0 °F | 40.4 °F | 1.44 in. |
| December | 11.2 °F | 26.6 °F | 1.01 in. |
| Annual | 33.8 °F | 53.3 °F | 30.15 in. |
| 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 : -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 |