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
11/22/09 00:57:10
Sunrise: 06:49 - Sunset: 16:25 - Moon: Waxing 24% 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: 44.2 F
Wind Chill: 44.2 F
Heat Index: 44.2 F
Dewpoint: 38.1 F
Humidity: 79 %
Barometer: 30.226  in -
Wind: SE  at   2  mph
High Wind: 11 mph at 00:26
Recent Avg Wind: 4 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: 0.45  in
Yearly Rain (JAN): 37.95  in
Air Density: 1.270  kg/m^3
Est. Cumulus Base: 1389  ft
High Temperature: 44.4 F at 00:35
Low Temperature: 44.0 F at 00:07
High Heat Index: 44.4 F at 00:35
Low Wind Chill: 38.3 F at 00:26
High Humidity: 80 % at 00:17
Low Humidity: 79 % at 00:00
High Dewpoint: 38.3 F at 00:35
Low Dewpoint: 37.9 F at 00:07
High Barometer: 30.232 in at 00:03
Low Barometer: 30.224 in at 00:46
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 am CST Nov 22, 2009
Hazardous Weather Outlook

Overnight: Patchy fog. Otherwise, mostly clear, with a low around 41. South southeast wind around 5 mph.
Sunday: Patchy fog before 8am. Otherwise, sunny, with a high near 54. Southeast wind between 5 and 10 mph.

Sunday Night: Partly cloudy, with a low around 42. East southeast wind between 5 and 10 mph.

Monday: Partly sunny, with a high near 55. Southeast wind around 5 mph.

Monday Night: Mostly cloudy, with a low around 44. Southeast wind between 5 and 10 mph.

Tuesday: A 50 percent chance of showers. Cloudy, with a high near 50.

Tuesday Night: A 40 percent chance of showers. Cloudy, with a low around 42.

Wednesday: A chance of showers. Mostly cloudy, with a high near 44.

Wednesday Night: A chance of rain and snow showers. Mostly cloudy, with a low around 38.

Thanksgiving Day: A chance of snow. Mostly cloudy, with a high near 45.

Thursday Night: Partly cloudy, with a low around 36.

Friday: Mostly sunny, with a high near 46.

Friday Night: Mostly clear, with a low around 35.

Saturday: Mostly sunny, with a high near 47.

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 Luitien Pan (weather station chief) or William Vaughan (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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