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Personalized Forecasts

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    • Today

      Sep 30

      16° /13°C
      Rain and drizzle
      • Neutral
      • weather for asthma
      • Hi RealFeel: 16°
      • UV: 2 - Low
      • Air Qual.: Good
    • Sat

      Oct 1

      20° /12°
      Some rain and a thunderstorm
      • At Risk
      • weather for asthma
      • Hi RealFeel: 18°
      • UV: 2 - Low
      • Air Qual.: Good
      More
    • Sun

      Oct 2

      19° /13°
      Mostly cloudy, brief showers
      • Neutral
      • weather for asthma
      • Hi RealFeel: 19°
      • UV: 2 - Low
      • Air Qual.: Good
      More
    • Mon

      Oct 3

      20° /11°
      Periods of sun with a shower
      • Beneficial
      • weather for asthma
      • Hi RealFeel: 21°
      • UV: 4 - Moderate
      • Air Qual.: Good
      More
    • Tue

      Oct 4

      21° /13°
      Partly sunny with a shower
      • Beneficial
      • weather for asthma
      • Hi RealFeel: 21°
      • UV: 4 - Moderate
      • Air Qual.: Good
      More

    Day

    16°Hi RealFeel® 16° Precipitation 85%
    Rain and drizzle; breezy this afternoon; watch for flooding
    • E 20 km/h
    • Gusts: 48 km/h
    • Max UV Index: 1 (Low)
    • Thunderstorms: 20%
    • Precipitation: 11 mm
    • Rain: 11 mm
    • Snow: 0 CM
    • Ice: 0 mm
    • Hours of Precipitation: 4.5 hrs
    • Hours of Rain: 4.5 hrs

    Night

    13°Lo RealFeel® 8° Precipitation 71%
    Breezy with occasional rain and drizzle
    • E 22 km/h
    • Gusts: 37 km/h
    • Max UV Index: N/A
    • Thunderstorms: 21%
    • Precipitation: 5 mm
    • Rain: 5 mm
    • Snow: 0 CM
    • Ice: 0 mm
    • Hours of Precipitation: 4 hrs
    • Hours of Rain: 4 hrs

    Temperature History

    more Historical Weather Data >
      Today Normal Record 9/30/2015
    High 16° 19° 27° (2002) 15°
    Low 13° 10° (1949) 10°

    Sunrise/Sunset

    • Sunrise: 7:26 AM
    • Sunset: 7:11 PM
    • Duration: 11:45 hr

    Moonrise/Moonset

    • Moonrise: 6:57 AM
    • Moonset: 7:17 PM
    • Duration: 12:20 hr
    Astronomy

    Sarnia Weather Report

    Weekly update signals a mild October for a majority of Canada

    September 30, 2016; 12:09 PM ET

    Latest clues to the long range into October. More >