Cheshire, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.1 °C (low) to 13.6 °C (high). Annual precipitation averages 1245.1 Millimeters. Cheshire is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.5 °C | -0.4 °C | 84.07 mm |
| February | -9.9 °C | 1.2 °C | 68.83 mm |
| March | -5.4 °C | 5.6 °C | 85.09 mm |
| April | 0.6 °C | 12.9 °C | 92.96 mm |
| May | 6.6 °C | 19.6 °C | 103.89 mm |
| June | 11.6 °C | 24.3 °C | 124.21 mm |
| July | 14.3 °C | 26.7 °C | 133.35 mm |
| August | 13.6 °C | 25.6 °C | 120.4 mm |
| September | 9.3 °C | 21.7 °C | 126.24 mm |
| October | 3.3 °C | 15.1 °C | 117.86 mm |
| November | -1.8 °C | 8.4 °C | 89.15 mm |
| December | -6.6 °C | 2.4 °C | 99.06 mm |
| Annual | 2.1 °C | 13.6 °C | 1245.11 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |