Coldwater, Michigan has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.1 °C (low) to 14.2 °C (high). Annual precipitation averages 986.3 Millimeters. Coldwater is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.6 °C | -0.8 °C | 64.01 mm |
| February | -8 °C | 0.8 °C | 55.63 mm |
| March | -3.4 °C | 6.7 °C | 59.94 mm |
| April | 2.7 °C | 14.1 °C | 85.6 mm |
| May | 9.4 °C | 20.4 °C | 105.66 mm |
| June | 14.7 °C | 25.6 °C | 101.85 mm |
| July | 16.3 °C | 27.6 °C | 100.33 mm |
| August | 15.2 °C | 26.4 °C | 107.44 mm |
| September | 11.1 °C | 23.2 °C | 86.36 mm |
| October | 5 °C | 16 °C | 89.15 mm |
| November | -0.4 °C | 8.4 °C | 71.37 mm |
| December | -5.2 °C | 1.9 °C | 58.93 mm |
| Annual | 4.1 °C | 14.2 °C | 986.27 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |