thumb|right|alt=pond with fish hatchery|York Pond with the Berlin Fish Hatchery in the background. Like all of northern New England, except the highest mountains, Berlin has a warm-summer humid continental climate (Köppen Dfb) characterized by cold, snowy winters and warm summers. Warm southerly or easterly airflows from an anticyclone in the Atlantic occasionally moderate the winters: on December 7, 2001, Berlin reached as warm as . Blocks to the west, however, may drive very cold air from eastern Canada and the shallow, frozen Hudson Bay, providing extremely cold winters as occurred in 1917/1918, 1922/1923 and 1933/1934; the coldest temperature recorded in Berlin is on December 30 and 31, 1917. It can be expected that each year on average 68 afternoons will not top freezing, that 34.4 mornings will fall to or below , and that 180.5 mornings will fall to or below freezing point. The average window for days not topping freezing is November 14 to March 29, and for subzero lows from December 11 to March 12. Snowfall is typically heavy at , with the historical range being from between July 1995 and June 1996 to between July 1979 and June 1980.
thumb|right|alt=pond with fish hatchery|York Pond with the Berlin Fish Hatchery in the background Like all of northern New England except the highest mountains Berlin has a warm-summer humid continental climate (Köppen Dfb) characterized by cold snowy winters and warm summers Warm southerly or easterly airflows from an anticyclone in the Atlantic occasionally moderate the winters on December 7 2001 Berlin reached as warm as  Blocks to the west however may drive very cold air from eastern Canada and the shallow frozen Hudson Bay providing extremely cold winters as occurred in 1917/1918 1922/1923 and 1933/1934; the coldest temperature recorded in Berlin is on December 30 and 31 1917 It can be expected that each year on average 68 afternoons will not top freezing that 344 mornings will fall to or below  and that 1805 mornings will fall to or below freezing point The average window for days not topping freezing is November 14 to March 29 and for subzero lows from December 11 to March 12 Snowfall is typically heavy at  with the historical range being from between July 1995 and June 1996 to between July 1979 and June 1980