Hourly Forecast - Montréal

YELLOW WATCH - SEVERE THUNDERSTORM

10:12 AM EDT Tuesday 28 July 2026

Impact Level: Moderate

Forecast Confidence: High

Conditions are favourable for the development of severe thunderstorms capable of producing strong wind gusts, hail and heavy rain this afternoon and evening. Nautical activities may be hazardous due to sudden, severe wind gusts over bodies of water. Damage to roofs, fences, branches or soft shelters is possible. When thunder roars, go indoors! Lightning kills and injures Canadians every year. Don't drive through flooded roadways. Heavy rain can cause flash flooding and significant reductions to visibility. Severe thunderstorm watches are issued when conditions are favourable for the development of thunderstorms capable of producing damaging hail, wind or rain. Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to QCstorm@ec.gc.ca or post reports on social media using #QCStorm.

In effect for:

Montréal Island area

Date/Time (EDT)	Temp. (°C)	Weather Conditions	Likelihood of precip (%)	UV index	Wind (km/h)	Humidex
28 July 2026
16:00	28	Showers or thunderstorms.	80	1	E 15	34
17:00	28	Showers or thunderstorms.	80	*	E 15	34
18:00	27	Showers or thunderstorms.	80	*	E 15	33
19:00	25	Showers or thunderstorms.	80	*	E 15	31
20:00	24	Showers or thunderstorms.	80	*	E 15	30
21:00	24	Showers or thunderstorms.	80	*	E 15	30
22:00	23	Showers or thunderstorms.	80	*	E 15	30
23:00	23	Showers or thunderstorms.	80	*	E 15	30
29 July 2026
00:00	22	Showers	80	*	E 15	29
01:00	22	Showers	80	*	E 15	29
02:00	21	Showers	80	*	E 15	28
03:00	20	Showers	80	*	E 15	27
04:00	20	Showers	80	*	E 15	26
05:00	19	Showers	80	*	E 15	*
06:00	19	A few showers	80	*	E 15	*
07:00	19	A few showers	80	*	E 15	*
08:00	19	A few showers	80	1	E 15	*
09:00	20	A few showers	80	2	E 15	26
10:00	20	A few showers	80	2	E 15	26
11:00	21	A few showers	80	3	NE 15	27
12:00	22	A few showers	80	3	NE 15	28
13:00	23	A few showers	80	3	NE 15	29
14:00	24	A few showers	80	2	NE 15	30
15:00	24	A few showers	80	2	NE 15	30

* Value not significant

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