Current data Radar/satellite images Forecast
University of Chicago weather
Ryerson Observatory
1100 E. 58th St., Chicago, IL 60637 : 41.8 N - 87.6 W - 690 ft
07/02/09 14:00:10
Sunrise: 05:21 - Sunset: 20:30 - Moon: Waxing 80% Full
Click images for past data
Temperature
degC wind-chill low high 		Wind
(km/hr) (mi/hr) high 		Humidity
low high
Today's rain/hr Today's barometric pressure
Today's solar radiation Today's ultraviolet radiation
Current radiation in the basement of the Regenstein Library: 7 μR/hr (info)
Temperature: 66.7 F
Wind Chill: 66.7 F
Heat Index: 66.7 F
Dewpoint: 58.5 F
Humidity: 75 %
Barometer: 29.996  in +
Wind: NE  at   9  mph
High Wind: 17 mph at 09:55
Recent Avg Wind: 7 mph
Recent Beaufort Scale: Light Breeze
Today's Rain: 0.00  in
Rain Rate: 0.00  in/hr
High Rain Rate: 0.00 in/hr at -----
Storm Total: 0.00  in
Monthly Rain: 0.03  in
Yearly Rain (JAN): 23.31  in
Air Density: 1.203  kg/m^3
Est. Cumulus Base: 1866  ft
High Temperature: 69.5 F at 12:54
Low Temperature: 61.7 F at 04:21
High Heat Index: 69.5 F at 12:54
Low Wind Chill: 61.7 F at 04:21
High Humidity: 79 % at 06:24
Low Humidity: 64 % at 11:20
High Dewpoint: 58.9 F at 12:41
Low Dewpoint: 53.4 F at 00:00
High Barometer: 30.007 in at 13:26
Low Barometer: 29.869 in at 01:59
Current conditions Almanac Last 24 hours Last 7 days Last 28 days Archives
radar (precipitation) satellite (clouds) S University ave webcam
radar loop
(click to enlarge) 		satellite loop
(click to enlarge) 		S University ave
(click to enlarge)
National Weather Service forecast for Chicago: Last Update: 12:04 pm CDT Jul 2, 2009

This Afternoon: Partly sunny, with a high near 73. North northwest wind between 10 and 15 mph.
Tonight: Partly cloudy, with a low around 63. North wind around 5 mph becoming calm.

Friday: Mostly sunny, with a high near 80. West northwest wind 5 to 10 mph becoming south.

Friday Night: Partly cloudy, with a low around 64. East southeast wind around 5 mph becoming calm.

Independence Day: Mostly sunny, with a high near 75. East northeast wind around 5 mph.

Saturday Night: Mostly cloudy, with a low around 62.

Sunday: Mostly sunny, with a high near 75.

Sunday Night: Partly cloudy, with a low around 63.

Monday: Mostly sunny, with a high near 76.

Monday Night: Partly cloudy, with a low around 67.

Tuesday: Mostly sunny, with a high near 78.

Tuesday Night: Partly cloudy, with a low around 66.

Wednesday: Mostly sunny, with a high near 80.

Hazardous Weather Outlook

Graphical hourly forecast (NWS):
NOAA graphical forecast

Chicago clear sky clock

Weather station and web page maintained by the Ryerson Astronomical Society at the University of Chicago. Send questions and comments to Joseph Cottral (current RAS president).

Local weather data collected using a Vantage Pro2 weather station from Davis Instruments. Thanks to the SGFC for providing funding to purchase this station.

Radar maps and forecasts are from the National Weather Service. Satellite images are from the Space Science and Engineering Center at UW-Madison. Clear sky clocks are from ClearDarkSky, using data from the Canadian Meteorological Center. Midway webcam images are from NSIT.

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