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 with periods of light rain likely in several areas. Winds will occasionally gust above 20 mph, particularly in southern Ontario locations. Temperatures will remain mild, with no extreme highs or lows forecasted during this period.