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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
415755087525300 O'HARE AIRPORT AT CHICAGO, IL
LOCATION - Lat 41°57'55", long 87°52'53" referenced to North American Datum of 1927, in NE 1/4 NW 1/4 NW 1/4 sec.16, T.40 N., R.12 E., Cook County, IL, Hydrologic Unit 07120004, on Montrose Road, 500 ft West of Mannheim Road, and on fence 100 ft past guard house of O'Hare Airport at Chicago.
CLIMATOLOGICAL RECORDS
PERIOD OF RECORD -
PRECIPITATION: October 1998 to current.
PRECIPITATION: October 1998 to current.
INSTRUMENTATION - Unheated tipping-bucket rain gage and satellite telemeter.
EXTREMES FOR PERIOD OF RECORD - Maximum daily total, 6.06 in., September 13, 2008.
REMARKS - Collection, computation, and publication of precipitation data do not necessarily conform to standards used by the National Weather Service. Precipitation data could be subject to error for days with freezing and/or thawing of precipitation, which are identified as estimated (e).
