Whitby, Ontario is in for a stretch of beautiful weather this week, with Environment Canada calling for four straight days of sunshine starting Monday, June 1, 2026. Daytime highs will climb from 23°C on Monday to 27°C by Thursday, offering ideal conditions for getting outdoors before rain chances move in for the weekend.
According to the Environment Canada forecast issued Monday morning, sunny skies are expected through Thursday. Tuesday will be sunny with a high of 21°C and a very high UV index of 8, meaning sun protection is a must during the afternoon. Wednesday warms up to 26°C and Thursday reaches 27°C, well above the historical average high of 22°C for this time of year.
As of 2:00 p.m. Monday, the temperature at Oshawa Executive Airport sat at 17.5°C under clear skies, with light east-southeast winds and visibility of 16 kilometres. The settled pattern begins to break down Friday, when a mix of sun and cloud brings a 30 per cent chance of showers and a high of 26°C. Saturday and Sunday both carry a chance of showers as well, with highs of 23°C and 24°C and a 40 per cent and 30 per cent chance, respectively.
The sunny stretch is perfectly timed for residents looking to enjoy Port Whitby and the community’s lakefront trails. It also coincides with the launch of the Durham Region Health Department beach monitoring program, which starts testing water quality the first week of June and runs through the end of August.
With sunrise at 5:36 a.m. and sunset at 8:51 p.m., there is plenty of daylight to take advantage of the pleasant conditions. Afternoon highs will be above normal for late spring, so packing water and sunscreen is a good idea for anyone planning to be outside for extended periods.
