Sumas, Washington | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast night icon
    Night
    Chance of Storms
    42°
    Saturday 5/18
    Forecast night icon
    42°
    Chance of Storms
    Hourly
    Night Details
    Partly cloudy with a slight chance of thunderstorms in the evening then partly cloudy late in the evening. Mostly cloudy with a slight chance of showers after midnight. Lows in the 40s. Southwest wind to 10 mph in the evening becoming light.
  • Forecast day icon
    Sunday
    Chance of Rain Showers
    60°
    Forecast night icon
    Night
    Mostly Clear
    41°
    Sunday 5/19
    Day
    60°
    Chance of Rain Showers
    Forecast day icon
    Night
    41°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy with a slight chance of showers in the morning then mostly sunny in the afternoon. Highs in the mid 50s to lower 60s. Light wind becoming southwest to 10 mph in the afternoon.
    Night Details
    Mostly clear. Lows in the 40s. Southwest wind to 10 mph in the evening becoming light.
  • Forecast day icon
    Monday
    Mostly Sunny
    64°
    Forecast night icon
    Night
    Chance of Rain
    47°
    Monday 5/20
    Day
    64°
    Mostly Sunny
    Forecast day icon
    Night
    47°
    Chance of Rain
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. Highs in the upper 50s to mid 60s. Light wind becoming southwest to 10 mph in the afternoon.
    Night Details
    Mostly cloudy. A chance of rain after midnight. Lows in the mid 40s to lower 50s. Southwest wind to 10 mph becoming south after midnight.
  • Forecast day icon
    Tuesday
    Rain
    55°
    Forecast night icon
    Night
    Rain
    44°
    Tuesday 5/21
    Day
    55°
    Rain
    Forecast day icon
    Night
    44°
    Rain
    Forecast night icon
    Hourly
    Day Details
    Rain at times. Highs in the mid to upper 50s.
    Night Details
    Rain likely in the evening then showers likely after midnight. Lows in the upper 40s.
  • Forecast day icon
    Wednesday
    Chance of Rain Showers
    59°
    Forecast night icon
    Night
    Chance of Rain Showers
    42°
    Wednesday 5/22
    Day
    59°
    Chance of Rain Showers
    Forecast day icon
    Night
    42°
    Chance of Rain Showers
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy with showers likely in the morning then partly sunny with a chance of showers in the afternoon. Highs in the lower 60s.
    Night Details
    Partly cloudy with a slight chance of showers. Lows in the mid to upper 40s.
  • Forecast day icon
    Thursday
    Chance of Rain Showers
    62°
    Forecast night icon
    Night
    Chance of Rain Showers
    47°
    Thursday 5/23
    Day
    62°
    Chance of Rain Showers
    Forecast day icon
    Night
    47°
    Chance of Rain Showers
    Forecast night icon
    Hourly
    Day Details
    Partly sunny with a chance of showers. Highs in the lower to mid 60s.
    Night Details
    Partly cloudy in the evening then becoming mostly cloudy. A chance of showers. Lows in the upper 40s.
  • Forecast day icon
    Friday
    Chance of Rain Showers
    56°
    Forecast night icon
    Night
    Chance of Rain Showers
    46°
    Friday 5/24
    Day
    56°
    Chance of Rain Showers
    Forecast day icon
    Night
    46°
    Chance of Rain Showers
    Forecast night icon
    Hourly
    Day Details
    Partly sunny with a chance of showers. Highs in the lower 60s.
    Night Details
    Partly cloudy with a chance of showers in the evening then mostly cloudy with a slight chance of showers after midnight. Lows in the upper 40s.
  • Forecast day icon
    Saturday
    Chance of Rain Showers
    64°
    Forecast night icon
    Night
    Mostly Clear
    47°
    Saturday 5/25
    Day
    64°
    Chance of Rain Showers
    Forecast day icon
    Night
    47°
    Mostly Clear
    Forecast night icon
    Day Details
    Partly sunny. A chance of showers in the morning then a slight chance of showers in the afternoon. Highs in the lower 60s.
    Night Details
    Mostly clear. Low temperature around 47F. Dew point will be around 47F with an average humidity of 85%. Winds will be 4 mph from the S.
  • Forecast day icon
    Sunday
    30% Chance of Rain
    65°
    Forecast night icon
    Night
    Partly Cloudy
    48°
    Sunday 5/26
    Day
    65°
    30% Chance of Rain
    Forecast day icon
    Night
    48°
    Partly Cloudy
    Forecast night icon
    Day Details
    Cloudy with a slight chance of rain. Chance of precipitation 25%. High temperature around 65F. Dew point will be around 48F with an average humidity of 68%. Winds will be 5 mph from the SW.
    Night Details
    Partly cloudy. Low temperature around 48F. Dew point will be around 47F with an average humidity of 83%. Winds will be 3 mph from the S.
  • Forecast day icon
    Monday
    30% Chance of Rain
    65°
    Forecast night icon
    Night
    Partly Cloudy
    48°
    Monday 5/27
    Day
    65°
    30% Chance of Rain
    Forecast day icon
    Night
    48°
    Partly Cloudy
    Forecast night icon
    Day Details
    Cloudy with a slight chance of rain. Chance of precipitation 30%. High temperature around 65F. Dew point will be around 49F with an average humidity of 67%. Winds will be 5 mph from the SW.
    Night Details
    Partly cloudy. Low temperature around 48F. Dew point will be around 48F with an average humidity of 85%. Winds will be 3 mph from the S.