East Haven's climate is tempered by its location on Long Island Sound; it has a continental climate which is common in New England.
 Winters are usually milder, with less snow accumulation, than those found inland.
 In a normal winter East Haven averages 27 inches (68.58 cm) of snowfall.
 It is not unusual to have a dusting of snow by the coast and an inch of snowfall in the northern areas of East Haven.
 The town is vulnerable to Nor'easter weather systems that can drop heavy rain or snow in the region.
 The Blizzard of 1888 dropped about 40 inches of snow, while the Blizzard of 1978 dropped almost 2 feet (0.61 m).

Summers are moderately warm and humid, though cooler than inland.
Though rare, the region does experience high heat waves and some 100 °F (38 °C) days.
 Precipitation is evenly spread throughout the year.

East Haven enjoys a fairly long growing season with the last frost occurring in mid April and the first frost occurring in mid October.
 On average, East Haven has 207 sunny days and 158 cloud or rainy days.

Severe weather does occur in East Haven.
 The area has been hit by several hurricanes, most recently in August 2011 when Hurricane Irene severely damaged numerous shore areas, destroying houses along Cosey Beach.
 In 1985, the eye of Hurricane Gloria came across state 22 west of East Haven.
 The area was without electricity, telephone and cable TV service for 7 days.

Tornadoes sometimes occur in Connecticut.
 Though the town was not directly affected, a tornado touched down in Hamden on July 10, 1989, 7 miles (11 km) away.
On August 11, 2016 a tornado touched down in North Haven, 5 miles (8.0 km) away.
East Haven's climate is tempered by its location on Long Island Sound; it has a continental climate which is common in New England.  Winters are usually milder, with less snow accumulation, than those found inland.  In a normal winter East Haven averages 27 inches (68.58 cm) of snowfall.  It is not unusual to have a dusting of snow by the coast and an inch of snowfall in the northern areas of East Haven.  The town is vulnerable to Nor'easter weather systems that can drop heavy rain or snow in the region.  The Blizzard of 1888 dropped about 40 inches of snow, while the Blizzard of 1978 dropped almost 2 feet (0.61 m).
Summers are moderately warm and humid, though cooler than inland. Though rare, the region does experience high heat waves and some 100 °F (38 °C) days.  Precipitation is evenly spread throughout the year.
East Haven enjoys a fairly long growing season with the last frost occurring in mid April and the first frost occurring in mid October.  On average, East Haven has 207 sunny days and 158 cloud or rainy days.
Severe weather does occur in East Haven.  The area has been hit by several hurricanes, most recently in August 2011 when Hurricane Irene severely damaged numerous shore areas, destroying houses along Cosey Beach.  In 1985, the eye of Hurricane Gloria came across state 22 west of East Haven.  The area was without electricity, telephone and cable TV service for 7 days.
Tornadoes sometimes occur in Connecticut.  Though the town was not directly affected, a tornado touched down in Hamden on July 10, 1989, 7 miles (11 km) away. On August 11, 2016 a tornado touched down in North Haven, 5 miles (8.0 km) away.
East Haven, Connecticut