Springfield, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.7 °C (low) to 15.9 °C (high). Annual precipitation averages 1198.1 Millimeters. Springfield is located in USDA Plant Hardiness Zone 6b. 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 | -8.1 °C | 1.8 °C | 84.58 mm |
| February | -7.3 °C | 3.3 °C | 75.95 mm |
| March | -2.7 °C | 7.9 °C | 102.62 mm |
| April | 3.3 °C | 15.4 °C | 94.49 mm |
| May | 9.1 °C | 21.6 °C | 91.44 mm |
| June | 14.2 °C | 26.1 °C | 111 mm |
| July | 17.3 °C | 29.2 °C | 101.09 mm |
| August | 16.3 °C | 28.3 °C | 98.55 mm |
| September | 12.1 °C | 24.2 °C | 116.08 mm |
| October | 5.7 °C | 17.3 °C | 124.71 mm |
| November | 0.3 °C | 10.7 °C | 89.92 mm |
| December | -4.4 °C | 4.7 °C | 107.7 mm |
| Annual | 4.7 °C | 15.9 °C | 1198.13 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 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 | Dfb - Humid Continental Mild Summer, Wet All Year |