Normals, Means, and Extremes

Dangerous Heat in the Central and Southern U.S.; Thunderstorms and Heavy Rain in the Northern Plains

Dangerous, prolonged heat is expected across portions of the Central and Southeast U.S. through July. Scattered severe thunderstorms are expected over parts of the northern Plains into the upper Mississippi Valley Tuesday, with damaging winds and large hail as the primary threats. Heavy rainfall could lead to areas of flooding across the northern Plains, Upper Midwest, Southeast and Southwest. 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"