Greatest 24-Hour Snowfall
36.0” - February 8-9, 2013 - Ansonia
Greatest Snow Depth
55” - February 5, 1961 - Norfolk 2SW
Greatest Monthly Snowfall
73.6” - March 1956 - Norfolk 2SW
68.9” - January 2011 - Staffordville
59.9” - January 2011 - Danbury
Greatest Seasonal Snowfall
177.4” - 1955 to 1956 - Norfolk 2SW
143.0” - 1919 to 1920 - Falls Village1
139.9” - 1915 to 1916 - Cornwall (Cream Hill)
*Needs to be QCd
Earliest Measurable Snow
0.1” - October 2, 1946 - Norfolk 2SW
9.5” - October 4-5, 1987 - Norfolk 2SW
Latest Measurable Snow
0.5” - May 27, 1961 - Norfolk 2SW
Highest Temperature
106F - July 15, 1995 - Danbury
106F - August 23, 1916 - Torrington
Coldest Temperature
-32F - January 22, 1961 - Coventry
-32F - February 16, 1943 - Falls Village
Greatest 24-Hour Precipitation
12.77” - August 19, 1955 - Burlington
Greatest Monthly Precipitation Total
27.45” - August 1955 - Burlington
26.66” - August 1955 - Torrington
Largest Hailstone (in diameter)
2.75” - June 20, 1995 - Vernon, Manchester, Deep River, and Old Saybrook
2.75” - May 29, 1969 - New London
Strongest Tornado
F4 - July 10, 1989 - Hamden & New Haven
F4 - October 3, 1979 - Windsor, Windsor Locks, Suffield
F4 - August 1878 - Kent to Killingworth (Wallingford)2
Strongest Hurricane
Category 3 - Hurricane Carol - August 31, 1954
Category 3 - Great New England Hurricane - September 21, 1938
Lowest Sea Level Pressure
946 mb - New Haven - September 21, 1938
Highest Sea Level Pressure
1053.8 - New Haven - February 13, 1981
Greatest Power Outages (Eversource & CL&P)
October Snowstorm (2011) - 803,000
Tropical Storm Irene (2011) - 671,000
Tropical Storm Isaias (2020) - 633,000
Hurricane Gloria (1985) - 506,000
Hurricane Sandy (2012) - 497,000
Northeast Blackout (2003) - 295,000
Ice Storm (1973) - 279,000*
Hurricane Bob (1991) - 275,000
November Snowstorm (1986) - 210,000
July Thunderstorm (1991) - 202,000
October Southeaster (2017) - 201,000
Tropical Storm Doria (1971) - 199,000*
Hurricane Belle (1976) - 196,000
*Includes all of Northeast Utilities (not just CL&P)
Awaiting further QC
F rating from Grazulis Significant Tornadoes