Connecticut Annual Rainfall and Climate Data, see below for individual cities 

 Connecticut Average Annual Precipitation

Connecticut city precipitation totals

City

Avg Annual Precip

Avg Annual Snow

Avg # days w/ Precip Avg # thunderstorm days Avg # hail days Avg # severe thunderstorm watches per year Avg # tornado watches per year # of tornadoes reported in county, 1960-2010
Bridgeport 44.15 26.4 118 22 1 0 10 12
Hartford 46.16 50.3 127 20 1 0 8 12
  • Connecticut Annual Precipitation Average - 50.39 inches, 10th wettest in U.S.
  • Connecticut Tornado Average - 1.4 per year, 42nd most in the U.S. 
  • Largest reported Tornado in Connecticut from 1950-2011, 10/3/1979 - 1,400 yards / .79 miles wide
  • Date with highest number of reported Tornadoes in Connecticut from 1950-2011, July 6th - 5 tornadoes
  • Average time of occurrence of reported Tornadoes in Connecticut from 1950-2011 - 3:29 pm
  • Connecticut Annual Lightning Density - 4.1 flashes per square mile - 35th highest in U.S
  • Record Driest year in Connecticut from 1895-2012 - 1965, avg precipitation 30.98 inches 
  • Record Wettest year in Connecticut from 1895-2012 - 1975, avg precipitation 69.60 inches 

Connecticut Precipitation Data

  • Driest location ranked by lowest annual average precipitation: Bridgeport, southeast Connecticut, 44.15"
  • Wettest location ranked by highest annual average precipitation: West Hartford, central Connecticut 56.93"
  • Snowiest location ranked by highest annual average snowfall: Norfolk, northwest Connecticut
  • State precipitation record for 24 hours - Burlington, central Connecticut, 8/19/1955, 12.77"
  • State precipitation record for 1 year - Burlington, central Connecticut, 1955, 78.53"
  • State snowfall record for 24 hours - New Haven, southern Connecticut, 28.0", 3/12/1888
  • State snow record for 1 season - Norfolk, northwest Connecticut, 177.4", 1955-1956


Data sources: National Climatic Data Center, severe thunderstorm / tornado watch data period is 1999 - 2008, NOAA Storm Prediction Center,
Tornado climate data - NOAA Storm Prediction Center, State lightning flash density average - 1997-2011, Vaisala