Atlanta, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.3 °C (low) to 12.5 °C (high). Annual precipitation averages 774.4 Millimeters. Atlanta is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.1 °C | -3.1 °C | 42.67 mm |
| February | -12.8 °C | -1.6 °C | 33.78 mm |
| March | -8.6 °C | 4.1 °C | 40.13 mm |
| April | -1.8 °C | 11.4 °C | 77.22 mm |
| May | 4.6 °C | 19.2 °C | 71.88 mm |
| June | 10.1 °C | 24.6 °C | 86.61 mm |
| July | 12.7 °C | 26.8 °C | 82.8 mm |
| August | 11.7 °C | 26 °C | 81.03 mm |
| September | 7.7 °C | 21.7 °C | 77.22 mm |
| October | 2.2 °C | 13.9 °C | 78.99 mm |
| November | -2.7 °C | 6.3 °C | 51.82 mm |
| December | -7.6 °C | 0.2 °C | 50.29 mm |
| Annual | 0.3 °C | 12.5 °C | 774.44 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |