Weather week ahead: warm days, cool nights and rain in Montreal
Posted September 28, 2026 7:22 am.
Montrealers will feel temperatures drop as fall weather begins.
Cloudy skies and a few showers will set the tone for the start of the week, with today’s high reaching 16 C. Northeasterly winds around 20 km/h are expected to ease this evening. Tonight will remain mainly cloudy, with a 30 per cent chance of showers and a low of 12 C.
Tuesday will bring mainly cloudy skies before conditions begin clearing in the afternoon. The temperature will climb to 19 C, with a clear night and a low of 11 C.
Warmer weather arrives Wednesday and Thursday. Wednesday will be cloudy with a high of 22 C and an overnight low of 17 C. Thursday will remain cloudy but warmer, reaching 24 C before temperatures fall to 16 C overnight.
A sharp change is expected Friday, with mostly cloudy conditions and a high of just 17 C. The overnight low will drop to 7 C.
Saturday will offer a mix of sun and cloud, with a high of 18 C. However, clouds will increase overnight, bringing a 60 per cent chance of showers and a low of 10 C.
The week will end with rain on Sunday and a high of 15 C, capping a week marked by fluctuating temperatures and unsettled skies.
