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To get the data from 2006-2008 for Chicago O'Hare, please use the following directions.
- Go to the link http://www.weather.gov/climate/index.php?wfo=lot
- For PRODUCT, click on Preliminary Climatology Data (CF6)
- For LOCATION, select Chicago O'Hare
- For TIMEFRAME, click on Archived Data and select the month you are interested in.
- Then hit the GO button.