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Flannel-ready fall forecast for San Jose, CA

Prepare for fall weather in San Jose, CA, with these seasonal temperature and precipitation outlooks.

History Park's Pacific Hotel and Light Tower.

We love seeing the leaves change + the decor go up at History Park in the fall.

Photo by SJtoday staff

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We know the question on your mind, fellow San Joseans — when’s the summer heat going to shuffle out? Thanks to the National Oceanic and Atmospheric Administration’s Climate Prediction Center, we know what temperatures and precipitation trends to expect in the great 408 for September, October, and November.

While exact weather conditions typically can’t be predicted more than a week in advance, here’s a seasonal outlook to help you prepare for what fall will bring.

Reminder: The first day of fall is on Saturday, Sept. 23.

A US map showing the seasonal temperature outlook for September-November.

The seasonal temperature outlook for this fall.

Screenshot via NOAA

🌡️ Temperature

Summer weather may be extending its stay. This fall, San Jose has a 33-40% chance of temperatures being higher than normal.

🌨️ Precipitation

Expect slight precipitation. Trends point to a typical amount of rainfall for SJ this fall.


This month marks the transition from summer to fall, but toastier temperatures may stick around. The average high of 81.9°F in August cools ever so slightly to an average high of 79.7°F and a low of 55.6°F this month.


Come spooky season, it cools a bit more. You can expect an average high of 72.7°F and a low of 52.7°F — so prepare to pack a light jacket for the kiddos on Halloween night.


There will be a noticeable drop in temperature as the fall closes with an average high of 63.9°F and a low of 47.3°F. Despite a shrinking window of daylight, get ready for the festive lights and displays of Christmas in the Park coming at the end of this month.

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