Bedford, New Hampshire has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.9 °F (low) to 58.2 °F (high). Annual precipitation averages 45.1 Inches. Bedford is located in USDA Plant Hardiness Zone 6a. 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 | 13.5 °F | 32.8 °F | 3.13 in. |
| February | 15.0 °F | 35.7 °F | 3.05 in. |
| March | 23.2 °F | 43.7 °F | 3.69 in. |
| April | 34.1 °F | 57.0 °F | 3.78 in. |
| May | 45.1 °F | 68.2 °F | 3.61 in. |
| June | 54.5 °F | 77.2 °F | 4.19 in. |
| July | 60.0 °F | 82.3 °F | 3.67 in. |
| August | 58.1 °F | 80.8 °F | 3.67 in. |
| September | 50.5 °F | 73.5 °F | 3.78 in. |
| October | 38.8 °F | 60.4 °F | 4.66 in. |
| November | 29.4 °F | 49.0 °F | 3.68 in. |
| December | 20.0 °F | 38.2 °F | 4.15 in. |
| Annual | 36.9 °F | 58.2 °F | 45.06 in. |
| 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 6a : -10°F to -5°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 |