NSF headquarters

Alexandria, Virginia Local Weather

National Science Foundation


The following weather conditions were observed by the weather station at the National Science Foundation, Division of Atmospheric and Geospace Sciences in Alexandria, Virginia, USA.
Quick Control (more options at bottom)
Status: Operational.
The value -99.9 represents invalid or missing data.
Most Recent Previous 24 hours
(Dec 10 2025, 07:10) Minimum Maximum
Temperature 0.4°C -5.4°C @ 07:15 0.4°C @ 02:40
Dewpoint -3.3°C -17.5°C @ 07:15 -3.2°C @ 06:55
Humidity 76% 38% @ 07:10 77% @ 06:55
Pressure 1000 hPa 1000 hPa @ 07:10 1018 hPa @ 09:45
Aeronautical 1016 hPa 1016 hPa @ 07:10 1034 hPa @ 09:45
Wind Speed 2.8 m/s 0.5 m/s @ 09:25 4.0 m/s @ 17:40
Peak Gust 6.9 m/s 1.0 m/s @ 09:25 11.1 m/s @ 20:00
Wind Chill -2.6°C -6.5°C @ 00:50 0.4°C @ 02:40
Wind Dir 170° (from the S)
Rain 0.0 mm

Weather Plots (5-minute, metric units)

/net/weather/web-data/nsf/plots/nsf_tdry.png /net/weather/web-data/nsf/plots/nsf_rh.png /net/weather/web-data/nsf/plots/nsf_cpres0.png /net/weather/web-data/nsf/plots/nsf_wspd.png /net/weather/web-data/nsf/plots/nsf_wdir.png /net/weather/web-data/nsf/plots/nsf_raina.png
Select Plots and PeriodSite: Fields: Units: Display period:

The realtime information is updated every five minutes. Weekly plots are generated just after 2 pm and 2 am (Eastern Time) every day, while monthly plots are only generated just after 2 am (Eastern Time).

More Links


Contact Nick Anderson nanderso@nsf.gov at NSF for information on the NSF station.


This www weather station was designed at the Earth Observing Laboratory
of the NSF National Center for Atmospheric Research in Boulder, Colorado, USA.

The weather station maintainers can be reached at wwweather@eol.ucar.edu.