We had problems with the equipment at the UW weather station during the month of May. As a result this summary is based on readings from the Environment Canada weather station at the Waterloo-Wellington Airport.
University of Waterloo Weather Station Summary - May 2010
A warm May with average precipitation
It was the warmest May since 1999 with an overall temperature about one and half degrees above average. A cold snap from May 6th to 13th was offset by a very warm end to month where we saw temperature that were more summer-like.
This makes 7 months in a row that the temperature was above average.
The 67 mm of precipitation was a little less than the 75.7 mm average, but this is still within the average range. About 25 mm came down on the very wet May 7th.
Summary for May 2010:
Maximum Temperature 31,8 °C
Minimum Temperature -1.2 °C
Average Daily High Temperature 20.5 °C (Long term average 18.9 °C)
Average Daily Low Temperature 7.8 °C (Long term average 6.6 °C)
Total Precipitation 67.3 mm (Long term average 75.7 mm)
(Long term averages based on 1971-2000 data for the Waterloo Wellington Airport)