Weather forecast for: Sumas WA
Last Update: 1:20 pm PST Nov 3, 2026
Tonight: Partly cloudy, with a low around 40. Calm wind.
Wednesday: Increasing clouds, with a high near 59. Calm wind.
Wednesday Night: Rain, mainly after 8pm. Low around 47. Light and variable wind becoming south around 5 mph after midnight. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday: Rain likely, mainly before 10am. Partly sunny, with a high near 56. South southwest wind 5 to 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night: Rain after 10pm. Low around 46. East southeast wind around 6 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday: Rain. High near 55. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 45.
Saturday: A chance of rain. Mostly cloudy, with a high near 59.
Saturday Night: Rain, mainly after 10pm. Cloudy, with a low around 48.
Sunday: Rain, mainly before 4pm. Mostly cloudy, with a high near 55.
Sunday Night: A chance of rain. Mostly cloudy, with a low around 41.
Monday: A chance of rain. Partly sunny, with a high near 54.
Monday Night: Rain likely. Mostly cloudy, with a low around 45.
Tuesday: Rain. Cloudy, with a high near 57.