University of Chicago weather
Ryerson Observatory
1100 E. 58th St., Chicago, IL 60637 : 41.8 N - 87.6 W - 690 ft
08/28/08 10:07:10
Sunrise: 06:13 - Sunset: 19:31 - Moon: Waning 7% Full

Current local conditions:

Temperature: 72.4 F
Wind Chill: 72.4 F
Heat Index: 72.4 F
Wind: SSW  at   9  mph
High Wind: 15 mph at 09:54
Recent Avg Wind: 6 mph
Recent Beaufort Scale: Light Breeze
Humidity: 75 %
Today's Rain: 0.00  in
Rain Rate: 0.00  in/hr
Current radiation in the basement of the Regenstein Library: 9 μR/hr (info)

Past records for this station:

National Weather Service forecast for Chicago:

Last Update: 545 AM CDT THU AUG 28 2008
Today...Considerable cloudiness with a 40 percent chance of showers and thunderstorms. Highs in the mid 80s...except lower 80s near the lake. South winds around 10 mph until late afternoon shifting to the west late in the afternoon.

Tonight...Showers and thunderstorms likely in the evening...then a slight chance of showers and thunderstorms after midnight. Lows in the mid 60s. Northwest winds 10 to 15 mph. Chance of precipitation 60 percent.

Friday...Mostly sunny. Highs from the lower 80s inland to the upper 70s near the lake. North winds 10 to 15 mph.

Friday Night...Mostly clear. Lows in the mid 50s...except in the lower 60s downtown. Light and variable winds.

Saturday...Mostly sunny. Highs in the lower 80s. Light and variable winds.

Saturday Night...Clear. Lows in the upper 50s.

Sunday...Mostly sunny. Highs in the lower 80s.

Sunday Night...Mostly clear. Lows around 60.

Labor Day Through Wednesday...Mostly clear. Highs in the mid 80s. Lows in the mid 60s.

Chicago clear sky clock in ascii-art: 
         |#         11111111112222|#         1111111111
    Time |R12345678901234567890123|F1234567890123456789
  cloud2 |.,.....,:::ooo:..,,:ooo:|Oo,.....:,,,........
  trans2 |::::::::#O####o::::o####|##O::::oo,,,,,,,,:::
 seeing2 |,,,,,,,,,         ooo:::|oooooo:::         ,,
   wind2 |,,,,::::o:::::::::oooo,,|:ooooooooooo:::::::,
    hum2 |,,.......,::ooooooo:,,..|.....,...,,:::::::::
   temp2 |,,,,,,,,,,,,,,,,,.,,,,,,|,,,,,,,,,,,,,,,,,,,,

Key: larger character = worse for astronomy

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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