Lowlands of Western Whatcom County- Including the cities of Bellingham, Sumas, Blaine, and Lynden 427 AM PDT Sat Apr 26 2025 .TODAY...Sunny. Highs in the upper 50s to mid 60s. Southwest wind to 10 mph increasing to 10 to 15 mph in the afternoon. .TONIGHT...Mostly clear. Lows in the 40s. Southwest wind to 10 mph increasing to south 10 to 20 mph with gusts to 30 mph after midnight. .SUNDAY...Mostly sunny. Highs in the mid 50s to lower 60s. South wind 10 to 15 mph becoming southwest in the afternoon. .SUNDAY NIGHT...Partly cloudy. Lows in the mid to upper 40s. South wind 10 to 20 mph. .MONDAY...Mostly cloudy. A slight chance of rain in the morning, then a chance of rain in the afternoon. Highs in the 50s. South wind 10 to 15 mph with gusts to 25 mph. .MONDAY NIGHT...Rain at times. Lows near 50. .TUESDAY...Mostly cloudy. A chance of rain in the morning, then a slight chance of rain in the afternoon. Highs near 60. .TUESDAY NIGHT...Partly cloudy in the evening then becoming mostly cloudy. Lows in the mid to upper 40s. .WEDNESDAY...Partly sunny. Highs in the lower to mid 60s. .WEDNESDAY NIGHT...Partly cloudy. Lows in the mid 40s. .THURSDAY...Mostly sunny. Highs in the mid 60s to lower 70s. .THURSDAY NIGHT...Partly cloudy. A chance of rain after midnight. Lows in the upper 40s. .FRIDAY...Mostly cloudy with a chance of rain. Highs in the lower 60s. && TEMPERATURE / PRECIPITATION Bellingham 62 44 61 / Sumas 67 43 62 / $$