Pittsfield, New Hampshire has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.5 °F (low) to 56.9 °F (high). Annual precipitation averages 45.9 Inches. Pittsfield is located in USDA Plant Hardiness Zone 5b. 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 | 12.9 °F | 30.5 °F | 3.0 in. |
| February | 13.9 °F | 33.7 °F | 3.07 in. |
| March | 22.3 °F | 41.9 °F | 3.68 in. |
| April | 33.4 °F | 55.7 °F | 3.86 in. |
| May | 44.5 °F | 67.7 °F | 3.9 in. |
| June | 54.1 °F | 76.3 °F | 4.19 in. |
| July | 59.6 °F | 81.7 °F | 4.33 in. |
| August | 58.0 °F | 80.0 °F | 3.67 in. |
| September | 50.3 °F | 72.4 °F | 3.63 in. |
| October | 39.1 °F | 59.2 °F | 4.94 in. |
| November | 29.4 °F | 47.0 °F | 3.5 in. |
| December | 20.1 °F | 36.2 °F | 4.11 in. |
| Annual | 36.5 °F | 56.9 °F | 45.88 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |