University of Chicago weather
Ryerson Observatory
1100 E. 58th St., Chicago, IL 60637 : 41.8 N - 87.6 W - 690 ft
11/24/09 00:25:10
Sunrise: 06:51 - Sunset: 16:24 - Moon: Waxing 42% Full

Current local conditions:

Temperature: 44.5 F
Wind Chill: 42.5 F
Heat Index: 44.5 F
Wind: E  at   4  mph
High Wind: 17 mph at 00:03
Recent Avg Wind: 2 mph
Recent Beaufort Scale: Light Air
Humidity: 92 %
Today's Rain: 0.00  in
Rain Rate: 0.00  in/hr
Current radiation in the basement of the Regenstein Library: 7 μR/hr (info)

Past records for this station:


National Weather Service forecast for Chicago:

Last Update: 12:09 am CST Nov 24, 2009
Dense Fog Advisory
Hazardous Weather Outlook

Overnight: Areas of dense fog. Otherwise, mostly cloudy, with a low around 44. Southeast wind around 5 mph.
Tuesday: Showers likely after noon. Areas of dense fog before 10am. Otherwise, cloudy, with a high near 54. Southeast wind around 10 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch possible.

Tuesday Night: Showers likely. Cloudy, with a low around 44. East southeast wind around 10 mph becoming southwest. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Wednesday: A 50 percent chance of showers. Cloudy, with a high near 48. West southwest wind between 10 and 15 mph.

Wednesday Night: A chance of rain and snow showers. Cloudy, with a low around 38. West southwest wind around 15 mph. Chance of precipitation is 50%.

Thanksgiving Day: A chance of rain and snow showers. Mostly cloudy, with a high near 41. Chance of precipitation is 50%.

Thursday Night: A chance of rain and snow showers. Mostly cloudy, with a low around 34. Chance of precipitation is 30%.

Friday: A slight chance of snow showers. Mostly cloudy, with a high near 43.

Friday Night: Partly cloudy, with a low around 33.

Saturday: Sunny, with a high near 47.

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

Sunday: Mostly sunny, with a high near 42.

Sunday Night: A slight chance of rain. Mostly cloudy, with a low around 32.

Monday: A slight chance of rain and snow. Mostly cloudy, with a high near 42.


Chicago clear sky clock in ascii-art:
         |#         11111111112222|#         111111111
    Time |T12345678901234567890123|W123456789012345678
  cloud2 |....,:oOO###############|###OO#oO###########
  trans2 |ooooo###################|###################
 seeing2 |,,::::::         #######|##oooooo         ##
   wind2 |,....,,,,,,,,,,,,,,,,:::|:::,,,,,,,,:::o::::
    hum2 |.............,,,,.......|...................
   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 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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