San Francisco Bay Area Weather Forecast (Including Santa Cruz County) – (1 to 2 days) – Mostly clear tonight through Tuesday. Westerly winds 5 to 15 knots.  High temperatures in the low 70’s into the mid 80’s on Monday and upper 80’s on Tuesday.  Low temperature mostly in the upper 40’s to low 50’s.  

Extended Forecast for Central California (Including Napa County south to Monterey County and east into the Sierras –  (3 to 7 days – (10/24/17-10/28/17) – Mostly clear Tuesday night through Saturday.  High temperatures in  the 70’s to mid 80’s Wednesday and Thursday cooling into the upper 70’s on Saturday.   Low temperatures mostly in the low 50’s. 

Long Range Weather Outlook Northern and Central California 8 to 15 days (10/29/17 – 11/05/17) – Mostly fair weather at the beginning of the period with an increasing chance of rain later in the period.   Near average temperatures early in the period  cooling later in the period.

Extremely Long Range Weather Outlook Northern and Central California 16 to 20 days (11/06/07 – 11/10/17) – Mostly fair weather throughout California.  Near  normal temperatures.

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 Short Term Weather 1 to 7 day Forecast Discussion –  The jet stream is expected to gradually retreat northward with precipitation continuing at times in the Pacific Northwest with a decreasing chance of rain at times over Northern California by Monday. High pressure is expected to rebuild over California next week for a return to mostly fair and warmer weather for the state that should continue for the next 10 days.

Northern and Central California 8 to 15 day extended forecast–  High pressure will hold over California keeping the state fair and dry at the beginning of the period. There will be a chance of rain later in the period over much of California from a low pressure system developing off the coast. Temperatures will be slightly above normal but will cool later in the period.

Northern and Central California 16 to 20 day extended forecast–  Computer models are showing weak high pressure will keep California mostly fair during the period with onshore flow and with coastal low clouds at times. Temperatures will average near normal during the period.