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
08/08/08 15:42:10
Sunrise: 05:53 - Sunset: 20:00 - Moon: Waxing 48% Full
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Temperature
degC heat-index 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: 72.6 F
Wind Chill: 72.6 F
Heat Index: 72.6 F
Dewpoint: 54.0 F
Humidity: 52 %
Barometer: 30.046  in -
Wind: NNW  at   13  mph
High Wind: 23 mph at 10:59
Recent Avg Wind: 9 mph
Recent Beaufort Scale: Gentle 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: 3.79  in
Yearly Rain (JAN): 18.09  in
Air Density: 1.192  kg/m^3
Est. Cumulus Base: 4252  ft
High Temperature: 73.4 F at 14:10
Low Temperature: 68.7 F at 06:10
High Heat Index: 73.4 F at 14:10
Low Wind Chill: 68.7 F at 06:10
High Humidity: 73 % at 01:33
Low Humidity: 45 % at 13:56
High Dewpoint: 61.0 F at 01:33
Low Dewpoint: 49.7 F at 13:56
High Barometer: 30.089 in at 11:04
Low Barometer: 30.007 in at 01:52
Current conditions Almanac Last 24 hours Last 7 days Last 28 days Archives
radar (precipitation) satellite (clouds) midway webcam
radar loop
(click to enlarge) 		satellite loop
(click to enlarge) 		midway
(click to enlarge)
National Weather Service forecast for Chicago: Last Update: 323 AM CDT FRI AUG 8 2008
Today...Mostly sunny. Highs in the upper 70s. North winds around 10 mph.

Tonight...Mostly clear. Lows in the upper 50s...except in the mid 60s downtown. Northeast winds around 10 mph early in the evening becoming light and variable in the late evening and early morning...then becoming southwest around 10 mph during the predawn hours.

Saturday...Partly sunny with a 20 percent chance of showers and thunderstorms. Highs in the upper 70s. West winds 10 to 15 mph.

Saturday Night...Partly cloudy with isolated showers and thunderstorms in the evening...then mostly clear after midnight. Lows in the mid 50s...except in the lower 60s downtown. West winds around 10 mph in the evening shifting to the northeast after midnight. Chance of precipitation 20 percent.

Sunday...Mostly sunny. Highs in the upper 70s. Northeast winds 10 to 15 mph.

Sunday Night...Mostly clear. Lows in the lower 60s.

Monday...Partly cloudy. Highs in the lower 80s.

Monday Night...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows in the mid 60s.

Tuesday...Partly sunny with a 30 percent chance of showers and thunderstorms. Highs in the lower 80s.

Tuesday Night And Wednesday...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows in the mid 60s. Highs in the lower 80s.

Wednesday Night And Thursday...Mostly clear. Lows in the mid 60s. Highs in the lower 80s.

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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