damansara:
during summer months the temp in Manitoba often goes up to 35-38C
What was unusual for 31C, was that it occurred on May 10. It is not unusual in this part of the world to have a snowstorm in late April or May. Spring usually does not start until late May or early June. It is the reason why we say that Spring lasts only 2-3 days:)
To have 31C this early is unusual and it set a new record for this date.