Northwestern Ontario weather for August 7-9, 2026, covering Kenora, Red Lake, Dryden, Vermilion Bay, Fort Frances, Sioux Lookout and ArmstrongNORTHWESTERN ONTARIO – WEATHER – Northwestern Ontario is settling into a cooler and more unsettled pattern for Friday through Sunday. Three-Day Northwestern Ontario ForecastKenoraFriday, August 7: Mainly cloudy with a 30 per cent chance of afternoon showers and a risk of a thunderstorm. Saturday, August 8: A mix of sun and cloud with a 40 per cent chance of showers. Sunday, August 9: A mix of sun and cloud with a 30 per cent chance of showers. Red LakeFriday: Cloudy with a 30 per cent chance of afternoon showers and a thunderstorm risk.