Auburn, New Hampshire has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.1 °C (low) to 14.7 °C (high). Annual precipitation averages 1095.3 Millimeters. Auburn is located in USDA Plant Hardiness Zone 6a. 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 | -10 °C | 0.6 °C | 71.63 mm |
| February | -9.1 °C | 2.2 °C | 73.66 mm |
| March | -4.4 °C | 6.7 °C | 84.07 mm |
| April | 1.6 °C | 13.9 °C | 88.9 mm |
| May | 7.6 °C | 20.2 °C | 88.39 mm |
| June | 12.9 °C | 25.2 °C | 107.7 mm |
| July | 15.9 °C | 28.1 °C | 92.71 mm |
| August | 14.9 °C | 27.3 °C | 92.2 mm |
| September | 10.7 °C | 23.2 °C | 96.52 mm |
| October | 4.2 °C | 15.9 °C | 112.78 mm |
| November | -1.1 °C | 9.7 °C | 88.14 mm |
| December | -6.2 °C | 3.6 °C | 98.55 mm |
| Annual | 3.1 °C | 14.7 °C | 1095.25 mm |
| 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 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |