Warm start, midweek rain, then a return to summer heat in Montreal
Posted June 8, 2026 6:59 am.
Residents can look forward to a predominantly warm and sunny week, with temperatures climbing steadily through Tuesday before a midweek rain system brings a brief cooldown.
Today will be mainly sunny with a high of 26 Celsius and a humidex of 28. UV levels will be very high, with an index of 8. Clear skies are expected tonight with a low of 15 C.
The warmest day of the week is forecast for Tuesday, featuring mainly sunny conditions and a high of 30 C. Humidity will make it feel closer to 33 C, while the UV index remains at a very high 8. Clouds will increase Tuesday night as temperatures dip to 18 C.
A change in weather arrives Wednesday with periods of rain and a daytime high of 24 C. Showers are expected to continue into the evening, with a mild overnight low of 21 C.
Conditions improve Thursday with a mix of sun and cloud and a high of 29 C. Thursday night will be mostly cloudy with a 30 per cent chance of showers and a low of 20 C.
The unsettled pattern returns Friday, bringing a mix of sun and cloud and a 60 per cent chance of showers. Temperatures will remain warm, reaching 29 C during the day before falling to 18 C overnight.
The weekend looks more pleasant, with a mix of sun and cloud expected on both Saturday and Sunday. Highs will reach 28 C on Saturday and 26 C on Sunday. Saturday night will feature cloudy periods with a low of 17 C.
Overall, the forecast calls for above-average temperatures, abundant sunshine, and only brief interruptions from rain, making for a largely summer-like week across the region.
