Sonoma County Airport (STS) Weather 08/18/2025
Tonight
50
Partly Cloudy
Monday
80
Becoming Sunny
Monday Night
49
Clear then Patchy Fog
Tuesday
83
Patchy Fog then Sunny
Tuesday Night
51
Clear then Patchy Fog
Wednesday
90
Patchy Fog then Sunny
Wednesday Night
54
Mostly Clear
Thursday
93
Sunny
Thursday Night
53
Mostly Clear
Friday
90
Sunny
Friday Night
53
Mostly Clear
Saturday
86
Sunny
Saturday Night
53
Mostly Clear
Weekly Forecast
Tonight
Partly cloudy, with a low around 50. West southwest wind 5 to 7 mph becoming calm after midnight.
Monday
Partly sunny, then gradually becoming sunny, with a high near 80. Calm wind becoming west southwest 5 to 9 mph in the afternoon.
Monday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 49. West southwest wind 8 to 13 mph becoming light west northwest after midnight.
Tuesday
Patchy fog before 8am. Otherwise, sunny, with a high near 83. Calm wind becoming southwest 5 to 9 mph in the afternoon.
Tuesday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 51. West southwest wind 6 to 11 mph becoming light west northwest after midnight.
Wednesday
Patchy fog before 7am. Otherwise, sunny, with a high near 90.
Wednesday Night
Mostly clear, with a low around 54.
Thursday
Sunny, with a high near 93.
Thursday Night
Mostly clear, with a low around 53.
Friday
Sunny, with a high near 90.
Friday Night
Mostly clear, with a low around 53.
Saturday
Sunny, with a high near 86.
Saturday Night
Mostly clear, with a low around 53.