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.
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Note: The current weather observation is more than thirty minutes old. The weather station may be down or undergoing maintenance, but will be returned to service as soon as possible. Thank you.

The value -99.9 represents invalid or missing data.
Most Recent Previous 24 hours
(Dec 18 2025, 07:45) Minimum Maximum
Temperature 4.6°C 0.4°C @ 08:00 12.3°C @ 14:35
Dewpoint -3.6°C -8.5°C @ 07:50 -1.3°C @ 14:50
Humidity 55% 32% @ 21:40 66% @ 05:05
Pressure 1016 hPa 1006 hPa @ 13:25 1017 hPa @ 06:55
Aeronautical 1033 hPa 1022 hPa @ 13:25 1033 hPa @ 06:55
Wind Speed 0.7 m/s 0.2 m/s @ 18:55 3.8 m/s @ 21:05
Peak Gust 1.1 m/s 0.4 m/s @ 19:15 7.2 m/s @ 21:05
Wind Chill 4.6°C -3.5°C @ 08:00 12.3°C @ 14:35
Wind Dir 199° (from the SSW)
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.