Springfield, New Hampshire has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34.9 °F (low) to 53.4 °F (high). Annual precipitation averages 47.1 Inches. Springfield is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 10.5 °F | 27.0 °F | 3.18 in. |
| February | 11.7 °F | 30.0 °F | 2.86 in. |
| March | 20.2 °F | 38.6 °F | 3.42 in. |
| April | 32.3 °F | 52.1 °F | 3.7 in. |
| May | 43.3 °F | 65.1 °F | 3.73 in. |
| June | 53.2 °F | 73.1 °F | 4.5 in. |
| July | 58.0 °F | 77.5 °F | 4.47 in. |
| August | 56.0 °F | 76.1 °F | 4.15 in. |
| September | 48.9 °F | 68.9 °F | 3.96 in. |
| October | 38.1 °F | 56.1 °F | 5.33 in. |
| November | 28.3 °F | 43.9 °F | 3.73 in. |
| December | 18.3 °F | 32.5 °F | 4.02 in. |
| Annual | 34.9 °F | 53.4 °F | 47.05 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |