Brockville is in for a warm and humid start to the week before rain chances make a return, according to Environment Canada. Monday and Tuesday are the best days for outdoor plans, with sunny skies and highs around 28°C.
Monday will feel like 34 with the humidity, and the UV index is very high at 8. Environment Canada measures humidity with the humidex, which combines temperature and moisture to show how hot it actually feels. A humid day can make activities feel much warmer and make it harder for the body to cool down.
Tuesday stays mainly sunny with another high of 28°C and humidex of 34. Wednesday brings a 30% chance of showers and a slightly warmer 29°C, while Thursday has a 40% chance of showers and a high of 28°C. Saturday looks sunny with a high of 26°C, while Sunday will be a mix of sun and cloud with the same high.
For a typical July in Brockville, the average high is 26°C and the low is 15°C, so this week’s temperatures are a bit above normal. Sunrise is at 5:24 a.m. and sunset at 8:50 p.m., giving plenty of daylight for outdoor fun.
The humid start is part of a larger heat wave across Ontario and Quebec, where humidex values have topped 40 in some areas. Brockville is not under a heat warning, but the heat and humidity may still be uncomfortable for some people, especially during outdoor work or exercise.
Brockville sits on the St. Lawrence River and is known as the eastern gateway to the 1000 Islands. Summer is a busy time for Brockville Tourism and local attractions like 1000 Islands & Seaway Cruises, where boat tours depend heavily on the weather. With rain likely later in the week, tourism operators and visitors may want to book tours and outdoor visits earlier, when skies are clearer.
At 1:00 p.m. Monday, the temperature was already 26.3°C with a humidex of 31, showing the forecast is on track.
