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
(Apr 30 2025, 05:25) Minimum Maximum
Temperature 20.7°C 12.9°C @ 06:40 27.5°C @ 16:20
Dewpoint 15.0°C 2.2°C @ 05:25 15.2°C @ 05:20
Humidity 70% 34% @ 14:05 70% @ 05:20
Pressure 1007 hPa 1007 hPa @ 02:20 1017 hPa @ 06:10
Aeronautical 1023 hPa 1023 hPa @ 02:20 1033 hPa @ 06:10
Wind Speed 0.4 m/s 0.3 m/s @ 04:20 4.8 m/s @ 17:20
Peak Gust 1.2 m/s 1.0 m/s @ 04:20 14.7 m/s @ 17:25
Wind Chill 20.7°C 10.3°C @ 05:55 27.5°C @ 16:20
Wind Dir 52° (from the NE)
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
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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.