Normals, Means, and Extremes

Dangerous Cold Weather for Most of the Country; Rare Winter Storm for the South; Fire Weather Concerns for Southern California

Arctic air will filter south and east through early this week. As this cold air moves across the South, a rare winter storm is forecast to develop from Texas, Gulf Coast States into the Southeast through early this week. Several new daily record low temperatures are expected, including new record-low maximum temperatures. For Southern California, fire weather concerns increase this week. 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"