January
Rain, quiet crowds, and what to expect this winter month.
February
Chinese New Year, Presidents' Day, and transitional weather.
March
Daylight saving shift, spring break, and improving weather.
April
One of the year's most reliably clear, mild months.
May
Long daylight, low fog risk, and Memorial Day timing.
June
Fog season begins, longest daylight, and Pride timing.
July
Peak fog and peak crowds, plus July 4th planning.
August
Continued fog season with easing crowds late in the month.
September
The start of San Francisco's best weather season.
October
Often the single best month, with Fleet Week timing to know.
November
Quiet early weeks, then a Thanksgiving travel surge.
December
A quiet start to the month, then the holiday-week rush.