DEMOGRAPHICS / CLIMATE

The Delaware Valley enjoys four distinct and colorful seasons with a rich variety of temperature changes and weather conditions. Spectacular changes in the landscape and vivid colors distinguish the seasons. Summer temperatures average from approximately 70 to 80 degrees and the January low averages 26 degrees Fahrenheit. Normal yearly precipitation includes 41.3 inches of rain and 21.8 inches of snow.

Average Temperatures & Precipitation
Degrees Fahrenheit and Inches

Month	Min	Max	Rain	Snow
January	26 F	40 F	3.3 in	6.3 in
February	26 F	41 F	3.08 in	6.7 in
March	33 F	50 F	3.5 in	3.9 in
April	43 F	62 F	3.3 in	0.2 in
May	53 F	73 F	3.4 in	0.0 in
June	63 F	81 F	3.7 in	0.0 in
July	68 F	85 F	4.1 in	0.0 in
August	66 F	83 F	4.5 in	0.0 in
September	60 F	60 F	3.4 in	0.0 in
October	49 F	66 F	2.8 in	0.1 in
November	39 F	54 F	3.1 in	0.7 in
December	29 F	43 F	3.2 in	3.9 in

 

Internet Weather Resources

Climate Diagnostics Center
www.esrl.noaa.gov/psd

National Weather Service
Eastern Region
www.weather.gov/erh

Delaware State Climatologist
www.udel.edu/leathers/stclim.html

Pennsylvania State Climatologist
http://climate.psu.edu