Longmeadow, Massachusetts has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.7 °C (low) to 15.8 °C (high). Annual precipitation averages 1202.9 Millimeters. Longmeadow is located in USDA Plant Hardiness Zone 6b. 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 | -7.9 °C | 1.8 °C | 84.58 mm |
| February | -7.2 °C | 3.3 °C | 76.2 mm |
| March | -2.6 °C | 7.9 °C | 102.87 mm |
| April | 3.3 °C | 15.3 °C | 96.77 mm |
| May | 9.1 °C | 21.5 °C | 91.44 mm |
| June | 14.2 °C | 26.1 °C | 111 mm |
| July | 17.2 °C | 29.1 °C | 101.35 mm |
| August | 16.3 °C | 28.2 °C | 99.06 mm |
| September | 12.1 °C | 24.2 °C | 116.08 mm |
| October | 5.8 °C | 17.3 °C | 125.22 mm |
| November | 0.3 °C | 10.7 °C | 90.17 mm |
| December | -4.3 °C | 4.7 °C | 108.2 mm |
| Annual | 4.7 °C | 15.8 °C | 1202.94 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 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |