Normals, Means, and Extremes

Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >

How to obtain information for daily & monthly normal & extremes
(temperature, precipitation, and snowfall)

You can get data for:

Washington DC (includes DCA)

Baltimore (includes BWI)

Sterling-Dulles Airport (includes IAD)

Baltimore Downtown (includes DMH)

Annapolis (includes NAK)

Hagerstown (includes HGR)

Charlottesville (includes CHO) Airport

and several other locations

How to obtain daily & monthly normals/averages (includes snowfall):
Click here

Select "1. Location"

Under "2. Product", select "Daily/monthly normals"

Under "3. Options" choose "Monthly" or "Daily", and then the "Variable" that you want

Finally hit "Go". Created is a graph with a chart of values below

How to obtain monthly extremes (includes snowfall):
Click here

Select "1. Location"
Under "2. Product", select "Monthly summarized data"
Under "3. Options" select the year range (note you can type POR for Period of Record)
Select the "Variable", and then under "Summary" select "Daily Maximum" or "Daily Minimum"
Finally hit "Go"

How to obtain daily extremes (includes snowfall):
Click here

Select "1. Location"
Under "2. Product", select "Calendar day summaries"
Under "3. Options" select the year range (note you can type POR for Period of Record)
Select the "Variable", and then under "Summary" make your selection
Finally hit "Go"