With 3 days that were more than 10 degrees hotter than average it is not surprising that overall the month was more than 3 degrees above average. The last time we had a colder than average month was back in March of 2011 and the last time we had a May this warm was in 1998.
For the third month in a row we had below average precipitation, only 28.8 mm compared to the average of 75.7 mm for May. In particular only 7.7 mm fell during the last half of the month.
So far this year we have had 208.6 mm of precipitation, this is far below the average of 340.2 mm.
Summary for May 2012:
Maximum Temperature 31.7°C
Minimum Temperature 1.5°C
Average Daily High Temperature 22.4°C (Long term average 18.7°C)
Average Daily Low Temperature 9.0°C (Long term average 6.4°C)
Total Precipitation 28.8 mm (Long term average75.7 mm)
(Long term averages based on 1971-2000 data for the Waterloo Wellington Airport)