Berlin, New Hampshire has a Subarctic With Cool Summers And Year Around Rainfall climate (Köppen classification: Dfc). Average annual temperatures range from 31.1 °F (low) to 53.4 °F (high). Annual precipitation averages 42.8 Inches. Berlin is located in USDA Plant Hardiness Zone 5a. 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 | 5.2 °F | 26.4 °F | 2.7 in. |
| February | 6.1 °F | 29.6 °F | 2.45 in. |
| March | 16.4 °F | 38.1 °F | 2.99 in. |
| April | 29.3 °F | 51.4 °F | 3.41 in. |
| May | 40.5 °F | 65.0 °F | 3.62 in. |
| June | 49.7 °F | 73.7 °F | 4.19 in. |
| July | 54.6 °F | 78.4 °F | 4.08 in. |
| August | 52.8 °F | 76.8 °F | 3.94 in. |
| September | 44.9 °F | 70.0 °F | 3.3 in. |
| October | 34.8 °F | 56.4 °F | 4.94 in. |
| November | 25.3 °F | 43.3 °F | 3.44 in. |
| December | 14.0 °F | 31.7 °F | 3.7 in. |
| Annual | 31.1 °F | 53.4 °F | 42.76 in. |
| 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 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfc - Subarctic With Cool Summers And Year Around Rainfall |