Clarkfield, Minnesota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 34.4 °F (low) to 55 °F (high). Annual precipitation averages 26.9 Inches. Clarkfield 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 Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 4.7 °F | 23.0 °F | 0.7 in. |
| February | 8.5 °F | 27.5 °F | 0.76 in. |
| March | 20.9 °F | 39.5 °F | 1.43 in. |
| April | 33.4 °F | 55.4 °F | 2.45 in. |
| May | 46.4 °F | 68.7 °F | 3.34 in. |
| June | 57.5 °F | 78.8 °F | 4.21 in. |
| July | 61.2 °F | 82.8 °F | 3.39 in. |
| August | 58.3 °F | 80.4 °F | 3.54 in. |
| September | 49.7 °F | 73.8 °F | 2.8 in. |
| October | 36.6 °F | 59.4 °F | 2.24 in. |
| November | 23.7 °F | 42.4 °F | 1.23 in. |
| December | 11.6 °F | 28.2 °F | 0.83 in. |
| Annual | 34.4 °F | 55 °F | 26.92 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| 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 4b : -25°F to -20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |