Ontario Highway 401 Current Weather Conditions with Radar. See 12 hour weather, wind, and temperature forecast on the Ontario Highway 401 corridor. Check conditions hour by hour with the time slider, switch between weather, temperature and wind views, and watch live radar for the route.
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Along Ontario Highway 401, expect mostly cloudy to overcast conditions in the western areas with gusty winds reaching up to 28 mph. Skies clear up moving eastward with several areas experiencing clear skies later in the day. Temperatures remain mild, with no extreme highs or lows forecasted. Winds are strongest in western and central Ontario, while eastern sections see calmer conditions.