Delaware Annual Rainfall, Severe Weather and Climate Data

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

Delaware Average Annual Precipitation

Delaware city precipitation totals

City	Avg Annual Precip	Avg Annual Snow	Avg # days of 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
Dover	44.66	15.0	114	28	1	2	8	18
Wilmington	42.81	21.4	116	29	1	2	10	20
Delaware Annual Precipitation Average - 45.68 inches, 16th wettest in U.S. Delaware Tornado Average - 1.2 per year, 44th most in the U.S.

Delaware Precipitation Data

Driest location ranked by lowest annual precipitation: Middletown, northern Delaware, 41.58"

Wettest location ranked by highest annual precipitation: Wilmington Reservoir, northern Delaware, 49.02"

Snowiest location ranked by highest annual snowfall: Wilmington, northern Delaware, 21.4"

State precipitation record for 24 hours - Vernon, central Delaware, 9/15-16/1999, 12.36"

State precipitation record for 1 year - Lewes, southern Delaware, 1948, 72.75"

State snowfall record for 24 hours - Dover, central Delaware, 2/18-19/1979, 25.0"

State snow record for 1 season - Wilmington, northern Delaware, 1995-1996, 59.4"

August 1, 2009 through January 31, 2010 was the wettest period since record-keeping began for the state 115 years ago. Delaware received 34.65 inches of precipitation, more than a foot above the average of 22.04"
Delaware temperature averages and extremes, precipitation and temperature data for all U.S. states and Top 10 U.S. climate extremes

Data sources: National Climatic Data Center, severe thunderstorm / tornado watch data period is 1999 - 2008, NOAA Storm Prediction Center

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