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Quality Controlled Local Climatological Data (QCLCD)

Quality Controlled Local Climatological Data (QCLCD) consist of hourly, daily, and monthly summaries for approximately 1,600 U.S. locations. Daily Summary forms are not available for all stations. Data are available beginning January 1, 2005 and continue to the present.  Please note, there may be a 48-hour lag in the availability of the most recent data. 

  • Quality Controlled Local Climatological Data (QCLCD)
    Data are available beginning January 1, 2005 and continue to the present.  Please note, there may be a 48-hour lag in the availability of the most recent data.
  • Unedited Local Climatological Data (ULCD)
    The Unedited Local Climatological Data product consists of unedited hourly, daily, and monthly summaries for over 700 U.S. locations. The ULCD covers data for July 1996 to December 2004.
  • QCLCD ASCII Files
    QCLCD ASCII, or plain text, data files provide monthly summaries of observations for all stations. Files between 2005 and 2007 may not match the same information presented in the QCLCD web form, and the Hourly Wind Speed is represented in knots (kts) rather than miles per hour (mph) for this period. The QCLCD ASCII data are available as compressed zip files. To download them, right click on the filename and select Save As. Then decompress the files using WinZip (Microsoft Windows/NT environment) or standard UNIX gunzip/tar.