Delaware Annual Rainfall see below for individual cities 


 

Delaware city precipitation totals

City

Avg Annual Precip

Avg Snow Annual

 Avg. days of Precip
Dover 44.66 15.0 114
Wilmington 42.81 21.4 116
State Average - 45.68 inches, 16th wettest in 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"

Precipitation data for other U.S. states
Data source: National Data Climatic Center