All of the Armagh Observatory humidity data has been calibrated for time of day and both the calibrated and uncalibrated data is available below.
Papers describing the data and its calibration are available below.
C.J. Butler & A.M. García-Suárez
Below are links to the files for daily relative humidity, both corrected and uncorrected for the time of observation, and the mean monthly, seasonal and annual relative humidity corrected for time of observation. For long term comparison of relative humidity the data corrected for time of observation should be used but, if at some time in the future research workers were to use the relative humidity for computation of specific humidity, they should use the daily uncorrected data and not monthly or seasonal means. We have included headers with information on the origin and status of the data and these headers should always be kept with the data wherever possible in order to avoid confusion with other datasets. You can open these files in your browser window and save them to your local computer system for your own analysis. If you use this data in any publication please cite the above papers and acknowledge Armagh Observatory. Please also inform email@example.com and send copies of publications to The Librarian, Armagh Observatory, College Hill, Armagh BT61 9DG, N. Ireland.
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Last Revised: 2012 November 29th