| NWS Forecast for: Sumas WA Issued by: National Weather Service Seattle, WA Last Update: 8:34 am PDT Jul 13, 2025 | |
| Today: Sunny, with a high near 85. Southwest wind 7 to 13 mph. Tonight: Partly cloudy, with a low around 62. South southwest wind 7 to 11 mph. Monday: Mostly cloudy, then gradually becoming sunny, with a high near 81. West wind 6 to 8 mph. Monday Night: Mostly clear, with a low around 61. West northwest wind 5 to 8 mph becoming northeast after midnight. Tuesday: Sunny, with a high near 91. Northeast wind 5 to 9 mph becoming north northwest in the afternoon. Tuesday Night: Mostly clear, with a low around 62. Wednesday: Sunny, with a high near 90. Wednesday Night: Mostly clear, with a low around 61. Thursday: Sunny, with a high near 86. Thursday Night: Mostly clear, with a low around 60. Friday: Mostly sunny, with a high near 82. Friday Night: Partly cloudy, with a low around 58. Saturday: Mostly sunny, with a high near 79. | |
| Sumas WA 49°N 122.27°W (Elev. 49 ft) | |
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