As the southern Ontario dries off, parts of eastern Ontario and Quebec will see more rainfall and thunderstorms on Wednesday. As a result, Ottawa airport set a new record for its wettest month ever recorded (255.5 mm as of July 27). The airport has so far recorded 255.5 mm of rain as of the afternoon of July 27. Advertisement AdvertisementAdvertisement AdvertisementIts previous record for its wettest month was July 2017, with 249.8 mm of rainfall observed. Ottawa airport wettest month on record July 2026Conditions will gradually improve Thursday into Friday but more rain is possible on the August long weekend, so plan accordingly.