The Leaving Cert weather could be have an effect on your tally of points.
It's because researchers in the US have found a significant link between hot weather and poor exam results.
The findings come ahead of the Leaving and Junior cert exams which kick off next Wednesday.
Academics from Harvard, UCLA and Georgia State looked at the test scores of 10 million secondary students over 13 years.
They found that when temperatures go up, school performance goes down.