San Francisco in September
This is the local summer: the warmest days of the year, the clearest views from Twin Peaks, and a visible drop in visitors after Labor Day.
Is September a good time to visit San Francisco?
September is a middling month in San Francisco — crowds around 78/100. Not the worst, but January is noticeably calmer.
What’s on in September
- Folsom Street Fair (last Sunday)
- Labor Day weekend — the last big domestic weekend
Best days in September
Weekdays are almost always calmer than weekends.
Tue is normally the calmest day of the week.
Best hours in September
The daily rhythm, hour by hour.
The 9:00 AM window is usually the calmest of the day.
Weather in September
Typical highs, lows and wet days.
How September compares
Every month in San Francisco, ranked by how calm it is.
Quieter alternatives
If your dates are flexible, these months are calmer in San Francisco.
Book things to do
Tours and tickets in San Francisco, from our booking partner.
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Frequently asked questions
Is September a good month to visit San Francisco?
September is a middling month in San Francisco — crowds around 78/100. Not the worst, but January is noticeably calmer.
How crowded is San Francisco in September?
San Francisco sits at roughly 78/100 in September on our crowd scale, which is 13 points above the yearly average. The quietest month is January.
What is the weather like in San Francisco in September?
Expect highs around 21°C and lows near 13°C in September, with about 1 wet days across the month.