BEFORE USING THESE DATA IT IS IMPORTANT THAT YOU READ:

NOTES TO USING THE WATERLOO WEATHER STATION ARCHIVE .

Additional weather data for Southern Ontario is also available from other related sources.

Some people have had problems downloading large data sets from this archive (specifically yearly data), we have hopefully solved the problems, but if you are still having problems we have made comma separated files available from the archive .

Also take a look at the historical charts of temperature and precipitation recorded at the Waterloo Weather Station.

NOTES TO USING THE WATERLOO WEATHER STATION ARCHIVE:

1. Each year in January the data from the previous year are checked and results are summarized below:
   
   

   Year	Number of Days	Number of Possible Readings	Actual Number of Readings	Missing Readings	Data Archive was Updated
   1998	308	29568	29541	27	January 22, 2001
   1999	365	35040	34937	103	January 22, 2001
   2000	366	35136	35135	1	January 22, 2001
   2001	365	35040	35021	19	January 24, 2002
   2002	365	35040	34551	507	January 6, 2003
   2003	365	35040	34721	319	January 5, 2004
   2004	366	35136	35136	0	January 3, 2005
   2005	365	35040	34883	157	January 4, 2006
   2006	365	35040	35039	1	January 3, 2007
   2007	365	35040	35039	1	January 3, 2008
   2008	366	35136	35040	96	January 6, 2009
   2009	365	35040	35040	0	January 4, 2010
   2010	365	35040	32678	2362	January 3, 2011
   2011	365	35040	N/A	N/A	To be done January 2012

   
   

2. The time listed in the data archive is based on local standard time (ie. during the summer the archive will be one hour behind daylight savings time).
   
   
3. The weather station was set up in late February 1998 and thus archive data is only available starting from 12:00 am February 27, 1998.
   
   
4. The precipitation recorded in the winter by the tipping bucket gauge is unreliable and thus only data from the Geonor precipitation gauge should be used when the temperature is near zero. This also means that annual precipitation totals from the weather station cannot be used before the Geonor was installed (Dec 2002).
   
   
5. Although we perform quality checking of the data from the weather station we cannot guarantee the accuracy or reliability of the data and thus you are advised that you are using that data at your own risk. The University of Waterloo Weather Station does not warrant the quality, accuracy, or completeness of any information, data or product from these web pages. It is provided "AS IS" without warranty or condition of any nature. The University of Waterloo Weather Station disclaims all other warranties, either expressed or implied, including but not limited to implied warranties of merchantability and fitness for a particular purpose, with respect to the information, data, product or accompanying materials retrieved from this web site.
   
   
6. We are always interested in who is using the archive and what it is being used for, so I would appreciate if you could drop me a note at weather@civmail.uwaterloo.ca and tell me how you are using the Waterloo Weather Station Archive. An appropriate byline acknowledging the University of Waterloo Weather Station is requested.
   

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