Clarkfield, Minnesota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 1.3 °C (low) to 12.8 °C (high). Annual precipitation averages 683.8 Millimeters. 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 | -15.2 °C | -5 °C | 17.78 mm |
| February | -13.1 °C | -2.5 °C | 19.3 mm |
| March | -6.2 °C | 4.2 °C | 36.32 mm |
| April | 0.8 °C | 13 °C | 62.23 mm |
| May | 8 °C | 20.4 °C | 84.84 mm |
| June | 14.2 °C | 26 °C | 106.93 mm |
| July | 16.2 °C | 28.2 °C | 86.11 mm |
| August | 14.6 °C | 26.9 °C | 89.92 mm |
| September | 9.8 °C | 23.2 °C | 71.12 mm |
| October | 2.6 °C | 15.2 °C | 56.9 mm |
| November | -4.6 °C | 5.8 °C | 31.24 mm |
| December | -11.3 °C | -2.1 °C | 21.08 mm |
| Annual | 1.3 °C | 12.8 °C | 683.77 mm |
| 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 : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |