Weather · September
San Bernardino weather in September
Average highs of 92°F, lows of 60°F and 0.10 in of rain, from 30 years of weather records.
September is San Bernardino’s 3rd warmest month, with average highs of 92°F and lows of 60°F. That is 4° cooler than August, and 13° above the yearly average high.
- Average high
- 92°F
- Average low
- 60°F
- Precipitation
- 0.10 in
- Wet days
- 1
- Sunrise · sunset
- 6:32 AM · 6:56 PM
What to wear in September
- Hot days: light, breathable clothes, a sun hat, sunscreen and plenty of water for anything outdoors.
What September weather is good for
What’s on in San Bernardino in September
Guides for this month: Halloween in San Bernardino.
See all upcoming events and school days off.
September compared with the months around it
Planning a trip? See the best time to visit San Bernardino and today’s forecast.
Questions
How hot does it get in San Bernardino in September?
Average highs are 92°F and average lows 60°F, for a daily mean of 76°F. Individual days run hotter or colder than these 30-year averages.
Does it rain in San Bernardino in September?
September averages 0.10 in of precipitation over about 1 days with at least 0.01 in. It is the 12th wettest month of the year.
What time is sunset in San Bernardino in September?
Around mid-September the sun rises about 6:32 AM and sets about 6:56 PM, for roughly 12.4 hours of daylight.
Is September a good time to visit San Bernardino?
The mildest months for visiting are April, May, October. September is hot, with Halloween events.
NOAA U.S. Climate Normals 1991–2020, Redlands station (7.3 mi from downtown). Sunrise and sunset are calculated for September 15 at the city’s coordinates.