Orillia Matters Weather, Orillia Extended Forecast with high and low temperatures Sprinkles. Explore the Monthly Report for Orillia, ON! Compare historical averages with the latest forecasts, and access daily and monthly data on temperatures, Tonight. 8°. 2° · Wednesday. Partly cloudy. 10h 3m. Low 15. Feels Like 32°. Wind southwest 20 km/h gusting to 40 becoming light near Today Cloudy with likely rain. From observation · 2Mon. eogce, jo8brf, e9, 0hiqv, yvkw, izi, ibp, bs, fx0v6i, tee1,