Sunny days in the low 20s, cool nights for the next few days

The Ottawa area should see clear skies this week, at least until Wednesday.
Sunday will have a high of 18 C with a UV index of 5, going down to 5 C overnight. Winds will be light from the west-southwest.
Monday should be slightly warmer with a high of 20, and again, cooling down to 5 C at night. 
Tuesday will be even better with a high of 22.
Environment Canada is predicting a 40 per cent chance of showers on Wednesday, however, with a high of 25.