Holt, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.5 °C (low) to 13.9 °C (high). Annual precipitation averages 877.8 Millimeters. Holt is located in USDA Plant Hardiness Zone 6a. 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 | -8.9 °C | -1.1 °C | 57.15 mm |
| February | -8.6 °C | 0.5 °C | 45.72 mm |
| March | -4 °C | 6.3 °C | 55.63 mm |
| April | 2.2 °C | 13.6 °C | 87.88 mm |
| May | 8.5 °C | 20.3 °C | 95.25 mm |
| June | 13.7 °C | 25.3 °C | 93.98 mm |
| July | 15.4 °C | 27.4 °C | 85.34 mm |
| August | 14.6 °C | 26.3 °C | 87.63 mm |
| September | 10.5 °C | 23 °C | 76.45 mm |
| October | 4.4 °C | 15.7 °C | 75.95 mm |
| November | -0.7 °C | 8.2 °C | 64.52 mm |
| December | -5.3 °C | 1.8 °C | 52.32 mm |
| Annual | 3.5 °C | 13.9 °C | 877.82 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |