During summertime , the average temperature is around 25 ° C ( 77 ° F ) at daytime , but it can get above 30 ° C ( 86 ° F ) on the hottest days .
During summer , the average temperature is around 21 ° C ( 70 ° F ) , but sometimes gets around 32 ° C ( 90 ° F ) on hot days .