Nevertheless,
Heavy trend this summer could:
Published on July 25, 2025 at 8:57 am
The Quebec summer 2025 is marked by spectacular thunderstorms. For example, July usually marks the peak of the stormy season, but August often follows the pace with vigor.
No leave for thunderstorms – Heavy trend this summer could
Certain summers, particularly agitated, confirm that thunderclaps do not take a vacation, even after the construction holidays. Consequently, In Quebec, thunderstorms are present almost every day during the summer. Moreover, It is only around mid-September that their frequency really begins to fade. In addition, Besides in the past 5 years, storm episodes have been observed 4 times until the second half of September. heavy trend this summer could Nevertheless, Only 2024 did not see any storm episode in September, the last being observed on August 27.
Storms in figures – Heavy trend this summer could
Each summer, Quebec records an average of 70 days of thunderstorm, including 20 days with violent weather (destructive winds, hail, torrential rain, even tornadoes). Moreover, August alone has an average of 23, including 6 days of violent phenomena. Nevertheless, All things considered, it is therefore almost the same average in August as for the rest of the summer.
High trend
For 5 years, every summer has exceeded the average heavy trend this summer could in storm frequency, and August has followed this trend each time. On the other hand, the time violates in August only distinguished itself once, while 3 in 5 summers have exceeded the average. It was in 2024 that August experienced two significant episodes. First on August 3, 2024 with its violent thunderstorms, and destructive winds. Then August 9. 2024: The Tropical Storm Debby had caused extreme rains (150 mm) and powerful winds due to nested thunderstorms in the system.
Tornadoes: August, one month to monitor
Since 2020, three summers have recorded a number of tornadoes greater than the average in Quebec. The month of August, it was active in 2021 and 2022, but clearly quieter in 2024. In the past 5 years, heavy trend this summer could the number of tornadoes in August has been much lower than the rest of summer.
Despite their rarity, EF3 category tornadoes mark the spirits. Of the 5 identified in Quebec for 40 years. 3 occurred in August, notably that of Aylmer in Outaouais in 1994, one of the most violent ever observed in the province. She struck on August 4, accompanied by an intense cold front in a persistent tropical atmosphere. Note that in 2017, 27 tornadoes were recorded, but only 2 in August. Proof that the weather does not like generalizations.
More than an extension of July
If it is true that July often establishes the tone of the stormy season, August often comes to sink the point, sometimes with more violence, sometimes in silence … but rarely without surprises. On a Quebec level, statistics speak for themselves: summer is electric, and August, often, is just as lightning.
With the collaboration of Réjean Ouimet, meteorologist.
In pictures: Storms in Quebec: possible tornado in the Laurentians.
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