Sumas, Washington | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast night icon
    Night
    Clear
    42°
    Sunday 5/19
    Forecast night icon
    42°
    Clear
    Hourly
    Night Details
    Clear. Low temperature around 42F. Dew point will be around 41F with an average humidity of 80%. Winds will be 4 mph from the SW.
  • Forecast day icon
    Monday
    Partly Sunny
    62°
    Forecast night icon
    Night
    Chance of Rain
    46°
    Monday 5/20
    Day
    62°
    Partly Sunny
    Forecast day icon
    Night
    46°
    Chance of Rain
    Forecast night icon
    Hourly
    Day Details
    Partly 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 in the morning. Lows in the mid 40s to lower 50s. South wind to 10 mph.
  • Forecast day icon
    Tuesday
    Rain
    54°
    Forecast night icon
    Night
    Rain
    44°
    Tuesday 5/21
    Day
    54°
    Rain
    Forecast day icon
    Night
    44°
    Rain
    Forecast night icon
    Hourly
    Day Details
    Rain. Rainfall amounts a half inch to one inch possible. Highs in the 50s. South wind 10 to 15 mph.
    Night Details
    Showers. Rainfall amounts a half inch to one inch possible. Lows in the 40s. South wind 10 to 15 mph becoming southwest after midnight. Gusts to 25 mph.
  • Forecast day icon
    Wednesday
    Chance of Rain Showers
    59°
    Forecast night icon
    Night
    Partly Cloudy
    42°
    Wednesday 5/22
    Day
    59°
    Chance of Rain Showers
    Forecast day icon
    Night
    42°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy. A chance of showers in the morning. Highs in the mid 50s to lower 60s. Southwest wind to 10 mph in the morning becoming light.
    Night Details
    Partly cloudy. Lows in the mid to upper 40s.
  • Forecast day icon
    Thursday
    Partly Sunny
    63°
    Forecast night icon
    Night
    Chance of Rain Showers
    47°
    Thursday 5/23
    Day
    63°
    Partly Sunny
    Forecast day icon
    Night
    47°
    Chance of Rain Showers
    Forecast night icon
    Hourly
    Day Details
    Partly sunny. Highs in the lower to mid 60s.
    Night Details
    Mostly cloudy. A slight chance of showers in the evening then a chance of showers after midnight. Lows near 50.
  • Forecast day icon
    Friday
    Chance of Rain Showers
    57°
    Forecast night icon
    Night
    Chance of Rain Showers
    44°
    Friday 5/24
    Day
    57°
    Chance of Rain Showers
    Forecast day icon
    Night
    44°
    Chance of Rain Showers
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy with showers likely in the morning then mostly cloudy with a chance of showers in the afternoon. Highs near 60.
    Night Details
    Mostly cloudy with a chance of showers. Lows in the mid to upper 40s.
  • Forecast day icon
    Saturday
    Chance of Rain Showers
    56°
    Forecast night icon
    Night
    Chance of Rain Showers
    44°
    Saturday 5/25
    Day
    56°
    Chance of Rain Showers
    Forecast day icon
    Night
    44°
    Chance of Rain Showers
    Forecast night icon
    Hourly
    Day Details
    Partly sunny. A chance of showers in the morning then a slight chance of showers in the afternoon. Highs near 60.
    Night Details
    Partly cloudy with a slight chance of showers in the evening then mostly cloudy with a chance of showers after midnight. Lows in the mid to upper 40s.
  • Forecast day icon
    Sunday
    Chance of Rain Showers
    55°
    Forecast night icon
    Night
    Partly Cloudy
    46°
    Sunday 5/26
    Day
    55°
    Chance of Rain Showers
    Forecast day icon
    Night
    46°
    Partly Cloudy
    Forecast night icon
    Day Details
    Partly sunny with a chance of showers. Highs in the lower 60s.
    Night Details
    Partly cloudy. Low temperature around 46F. Dew point will be around 46F with an average humidity of 89%. Winds will be 3 mph from the SW.
  • Forecast day icon
    Monday
    30% Chance of Rain
    68°
    Forecast night icon
    Night
    Partly Cloudy
    48°
    Monday 5/27
    Day
    68°
    30% Chance of Rain
    Forecast day icon
    Night
    48°
    Partly Cloudy
    Forecast night icon
    Day Details
    Partly cloudy with a slight chance of rain. Chance of precipitation 25%. High temperature around 68F. Dew point will be around 49F with an average humidity of 64%. Winds will be 4 mph from the W.
    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 SW.
  • Forecast day icon
    Tuesday
    Partly Cloudy
    71°
    Forecast night icon
    Night
    40% Chance of Rain
    51°
    Tuesday 5/28
    Day
    71°
    Partly Cloudy
    Forecast day icon
    Night
    51°
    40% Chance of Rain
    Forecast night icon
    Day Details
    Partly cloudy. High temperature around 71F. Dew point will be around 52F with an average humidity of 63%. Winds will be 5 mph from the W.
    Night Details
    Mostly cloudy with a chance of rain. Chance of precipitation 35%. Low temperature around 51F. Dew point will be around 51F with an average humidity of 83%. Winds will be 3 mph from the S.
  • Forecast day icon
    Wednesday
    50% Chance of Rain
    67°
    Forecast night icon
    Night
    50% Chance of Rain
    49°
    Wednesday 5/29
    Day
    67°
    50% Chance of Rain
    Forecast day icon
    Night
    49°
    50% Chance of Rain
    Forecast night icon
    Day Details
    Cloudy with a chance of rain. Chance of precipitation 50%. High temperature around 67F. Dew point will be around 52F with an average humidity of 69%. Winds will be 5 mph from the SW.
    Night Details
    Cloudy with a chance of rain. Chance of precipitation 45%. Low temperature around 49F. Dew point will be around 50F with an average humidity of 89%. Winds will be 5 mph from the S.