Auburn, New Hampshire has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.5 °F (low) to 58.5 °F (high). Annual precipitation averages 43.1 Inches. 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 | 14.0 °F | 33.0 °F | 2.82 in. |
| February | 15.7 °F | 36.0 °F | 2.9 in. |
| March | 24.0 °F | 44.0 °F | 3.31 in. |
| April | 34.8 °F | 57.1 °F | 3.5 in. |
| May | 45.6 °F | 68.4 °F | 3.48 in. |
| June | 55.2 °F | 77.4 °F | 4.24 in. |
| July | 60.7 °F | 82.5 °F | 3.65 in. |
| August | 58.9 °F | 81.1 °F | 3.63 in. |
| September | 51.2 °F | 73.8 °F | 3.8 in. |
| October | 39.6 °F | 60.7 °F | 4.44 in. |
| November | 30.0 °F | 49.4 °F | 3.47 in. |
| December | 20.8 °F | 38.5 °F | 3.88 in. |
| Annual | 37.5 °F | 58.5 °F | 43.12 in. |
| 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 : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |