Whitefield, New Hampshire has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 31.3 °F (low) to 53.5 °F (high). Annual precipitation averages 39.9 Inches. Whitefield is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.1 °F | 26.1 °F | 2.33 in. |
| February | 6.2 °F | 29.5 °F | 1.95 in. |
| March | 16.5 °F | 38.4 °F | 2.16 in. |
| April | 29.3 °F | 52.1 °F | 3.51 in. |
| May | 40.8 °F | 65.8 °F | 3.76 in. |
| June | 50.1 °F | 74.0 °F | 4.44 in. |
| July | 54.8 °F | 78.6 °F | 4.04 in. |
| August | 52.8 °F | 77.1 °F | 4.01 in. |
| September | 45.3 °F | 69.8 °F | 3.52 in. |
| October | 35.1 °F | 56.1 °F | 4.3 in. |
| November | 25.5 °F | 43.1 °F | 2.69 in. |
| December | 13.9 °F | 31.5 °F | 3.22 in. |
| Annual | 31.3 °F | 53.5 °F | 39.93 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |