Chatfield, Minnesota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 35.4 °F (low) to 54.8 °F (high). Annual precipitation averages 35.2 Inches. 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 | 6.7 °F | 23.7 °F | 1.02 in. |
| February | 10.1 °F | 28.2 °F | 1.09 in. |
| March | 22.5 °F | 40.6 °F | 1.89 in. |
| April | 34.6 °F | 55.6 °F | 3.58 in. |
| May | 46.6 °F | 67.9 °F | 4.5 in. |
| June | 57.1 °F | 77.8 °F | 5.54 in. |
| July | 60.9 °F | 81.4 °F | 3.96 in. |
| August | 58.5 °F | 79.3 °F | 4.41 in. |
| September | 50.3 °F | 72.4 °F | 3.66 in. |
| October | 37.9 °F | 58.8 °F | 2.54 in. |
| November | 26.0 °F | 42.7 °F | 1.72 in. |
| December | 14.1 °F | 29.4 °F | 1.29 in. |
| Annual | 35.4 °F | 54.8 °F | 35.2 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 | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |