Whitefield, New Hampshire has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.4 °C (low) to 12 °C (high). Annual precipitation averages 1014.2 Millimeters. 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 | -14.9 °C | -3.3 °C | 59.18 mm |
| February | -14.3 °C | -1.4 °C | 49.53 mm |
| March | -8.6 °C | 3.6 °C | 54.86 mm |
| April | -1.5 °C | 11.2 °C | 89.15 mm |
| May | 4.9 °C | 18.8 °C | 95.5 mm |
| June | 10.1 °C | 23.3 °C | 112.78 mm |
| July | 12.7 °C | 25.9 °C | 102.62 mm |
| August | 11.6 °C | 25.1 °C | 101.85 mm |
| September | 7.4 °C | 21 °C | 89.41 mm |
| October | 1.7 °C | 13.4 °C | 109.22 mm |
| November | -3.6 °C | 6.2 °C | 68.33 mm |
| December | -10.1 °C | -0.3 °C | 81.79 mm |
| Annual | -0.4 °C | 12 °C | 1014.22 mm |
| 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 : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |