Chatfield, Minnesota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 1.9 °C (low) to 12.7 °C (high). Annual precipitation averages 894.1 Millimeters. Chatfield 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 | -14.1 °C | -4.6 °C | 25.91 mm |
| February | -12.2 °C | -2.1 °C | 27.69 mm |
| March | -5.3 °C | 4.8 °C | 48.01 mm |
| April | 1.4 °C | 13.1 °C | 90.93 mm |
| May | 8.1 °C | 19.9 °C | 114.3 mm |
| June | 13.9 °C | 25.4 °C | 140.72 mm |
| July | 16.1 °C | 27.4 °C | 100.58 mm |
| August | 14.7 °C | 26.3 °C | 112.01 mm |
| September | 10.2 °C | 22.4 °C | 92.96 mm |
| October | 3.3 °C | 14.9 °C | 64.52 mm |
| November | -3.3 °C | 5.9 °C | 43.69 mm |
| December | -9.9 °C | -1.4 °C | 32.77 mm |
| Annual | 1.9 °C | 12.7 °C | 894.09 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |