King County Airport (BFI) Weather 08/02/2026
Tonight
59
Mostly Cloudy
Monday
78
Sunny
Monday Night
61
Partly Cloudy
Tuesday
75
Slight Chance Rain then Mostly Sunny
Tuesday Night
58
Partly Cloudy
Wednesday
75
Mostly Sunny
Wednesday Night
56
Mostly Clear
Thursday
78
Sunny
Thursday Night
57
Mostly Clear
Friday
82
Sunny
Friday Night
59
Mostly Clear
Saturday
79
Mostly Sunny
Saturday Night
58
Slight Chance Rain
Weekly Forecast
Tonight
Mostly cloudy, with a low around 59. South wind around 6 mph.
Monday
Sunny, with a high near 78. South wind 6 to 8 mph.
Monday Night
Partly cloudy, with a low around 61. South wind 6 to 9 mph.
Tuesday
A 20 percent chance of rain before 8am. Mostly sunny, with a high near 75. South wind 8 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 58. West southwest wind 5 to 8 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 75.
Wednesday Night
Mostly clear, with a low around 56.
Thursday
Sunny, with a high near 78.
Thursday Night
Mostly clear, with a low around 57.
Friday
Sunny, with a high near 82.
Friday Night
Mostly clear, with a low around 59.
Saturday
Mostly sunny, with a high near 79.
Saturday Night
A slight chance of rain. Partly cloudy, with a low around 58.