Sunblock for Friday, umbrellas for the weekend

You know it’s a summer weekend in Ottawa when you’ll need both heavy-duty sunblock and an umbrella.
First up is a scorchingly-sunny Friday. Then the risk of rain arrives for the weekend.
By Monday morning, it’s back to dry skies and some sunshine.
From a cool 10 C at dawn, Friday’s forecast is for the mercury to rise to 25 C with a UV index of 10 or very high, Environment Canada predicts. The forecast is for increasingly heavy clouds after midnight with a low of 15 C.
Sat