Deering, New Hampshire has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.7 °C (low) to 12.9 °C (high). Annual precipitation averages 1286.5 Millimeters. Deering is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.3 °C | -1.5 °C | 94.23 mm |
| February | -9.6 °C | 0.3 °C | 84.07 mm |
| March | -5.4 °C | 4.8 °C | 104.9 mm |
| April | 0.8 °C | 12.4 °C | 102.87 mm |
| May | 7 °C | 18.9 °C | 100.58 mm |
| June | 12.5 °C | 23.6 °C | 113.28 mm |
| July | 15.5 °C | 26.3 °C | 112.78 mm |
| August | 14.4 °C | 25.4 °C | 100.84 mm |
| September | 10.2 °C | 21.5 °C | 108.46 mm |
| October | 4.4 °C | 14.2 °C | 145.54 mm |
| November | -0.9 °C | 7.8 °C | 102.87 mm |
| December | -6.2 °C | 1.6 °C | 116.08 mm |
| Annual | 2.7 °C | 12.9 °C | 1286.5 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |