Sumas, Washington | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast night icon
    Night
    Chance of Rain
    46°
    Friday 5/17
    Forecast night icon
    46°
    Chance of Rain
    Hourly
    Night Details
    Mostly cloudy. A slight chance of rain after midnight. A chance of rain late in the night. Lows in the 40s. South wind 10 to 15 mph.
  • Forecast day icon
    Saturday
    Chance of Storms
    56°
    Forecast night icon
    Night
    Chance of Storms
    42°
    Saturday 5/18
    Day
    56°
    Chance of Storms
    Forecast day icon
    Night
    42°
    Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Rain likely until late afternoon then mostly cloudy with a chance of showers and a slight chance of thunderstorms late in the afternoon. Rainfall amounts a tenth to a quarter of an inch possible except higher amounts possible in thunderstorms. Highs in the 50s. Southwest wind 10 to 15 mph.
    Night Details
    Partly cloudy with a slight chance of thunderstorms in the evening then partly cloudy with a slight chance of rain after midnight. Lows in the 40s. Southwest wind to 10 mph in the evening becoming light.
  • Forecast day icon
    Sunday
    Chance of Rain
    61°
    Forecast night icon
    Night
    Mostly Clear
    40°
    Sunday 5/19
    Day
    61°
    Chance of Rain
    Forecast day icon
    Night
    40°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Partly sunny. A slight chance of rain in the morning. 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
    65°
    Forecast night icon
    Night
    Chance of Rain
    47°
    Monday 5/20
    Day
    65°
    Mostly Sunny
    Forecast day icon
    Night
    47°
    Chance of Rain
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. Highs in the 60s.
    Night Details
    Partly cloudy in the evening then mostly cloudy with a slight chance of rain after midnight. Lows near 50.
  • Forecast day icon
    Tuesday
    Rain
    57°
    Forecast night icon
    Night
    Rain
    47°
    Tuesday 5/21
    Day
    57°
    Rain
    Forecast day icon
    Night
    47°
    Rain
    Forecast night icon
    Hourly
    Day Details
    Rain likely in the morning then rain at times in the afternoon. Highs in the mid to upper 50s.
    Night Details
    Rain likely. Lows in the upper 40s.
  • Forecast day icon
    Wednesday
    Chance of Rain
    60°
    Forecast night icon
    Night
    Chance of Rain
    44°
    Wednesday 5/22
    Day
    60°
    Chance of Rain
    Forecast day icon
    Night
    44°
    Chance of Rain
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy with a chance of rain. Highs in the lower 60s.
    Night Details
    Partly cloudy in the evening then becoming mostly cloudy. A slight chance of rain. Lows in the mid to upper 40s.
  • Forecast day icon
    Thursday
    Chance of Rain
    59°
    Forecast night icon
    Night
    Chance of Rain
    48°
    Thursday 5/23
    Day
    59°
    Chance of Rain
    Forecast day icon
    Night
    48°
    Chance of Rain
    Forecast night icon
    Hourly
    Day Details
    Partly sunny with a slight chance of rain. Highs in the lower 60s.
    Night Details
    Mostly cloudy with a slight chance of rain. Lows in the upper 40s.
  • Forecast day icon
    Friday
    Chance of Rain
    63°
    Forecast night icon
    Night
    30% Chance of Rain
    48°
    Friday 5/24
    Day
    63°
    Chance of Rain
    Forecast day icon
    Night
    48°
    30% Chance of Rain
    Forecast night icon
    Day Details
    Mostly cloudy with a chance of rain. Highs in the lower to mid 60s.
    Night Details
    Mostly clear with a slight chance of rain. Chance of precipitation 30%. Low temperature around 48F. Dew point will be around 47F with an average humidity of 85%. Winds will be 3 mph from the S.
  • Forecast day icon
    Saturday
    40% Chance of Rain
    66°
    Forecast night icon
    Night
    Partly Cloudy
    47°
    Saturday 5/25
    Day
    66°
    40% Chance of Rain
    Forecast day icon
    Night
    47°
    Partly Cloudy
    Forecast night icon
    Day Details
    Cloudy with a chance of rain. Chance of precipitation 35%. High temperature around 66F. Dew point will be around 48F with an average humidity of 66%. Winds will be 6 mph from the SW.
    Night Details
    Partly cloudy. Low temperature around 47F. Dew point will be around 47F with an average humidity of 82%. Winds will be 3 mph from the SW.
  • Forecast day icon
    Sunday
    30% Chance of Rain
    67°
    Forecast night icon
    Night
    Clear
    48°
    Sunday 5/26
    Day
    67°
    30% Chance of Rain
    Forecast day icon
    Night
    48°
    Clear
    Forecast night icon
    Day Details
    Mostly cloudy with a slight chance of rain. Chance of precipitation 25%. High temperature around 67F. Dew point will be around 48F with an average humidity of 64%. Winds will be 6 mph from the SW.
    Night Details
    Clear. Low temperature around 48F. Dew point will be around 47F with an average humidity of 81%. Winds will be 3 mph from the S.