Weather · September
San Luis Obispo weather in September
Average highs of 80°F, lows of 53°F and 0.00 in of rain, from 30 years of weather records.
September is San Luis Obispo’s warmest month, with average highs of 80°F and lows of 53°F. That is about the same as August, and 8° above the yearly average high.
- Average high
- 80°F
- Average low
- 53°F
- Precipitation
- 0.00 in
- Wet days
- 1
- Sunrise · sunset
- 6:45 AM · 7:10 PM
What to wear in September
- Warm days: shorts and T-shirts, with a light layer for cooler evenings.
What September weather is good for
What’s on in San Luis Obispo in September
Guides for this month: Halloween in San Luis Obispo.
See all upcoming events.
September compared with the months around it
Planning a trip? See the best time to visit San Luis Obispo and today’s forecast.
Questions
How hot does it get in San Luis Obispo in September?
Average highs are 80°F and average lows 53°F, for a daily mean of 66°F. Individual days run hotter or colder than these 30-year averages.
Does it rain in San Luis Obispo in September?
September averages 0.00 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 Luis Obispo in September?
Around mid-September the sun rises about 6:45 AM and sets about 7:10 PM, for roughly 12.4 hours of daylight.
Is September a good time to visit San Luis Obispo?
Yes. September is one of the mildest months, with highs between 65°F and 85°F and little rain.
NOAA U.S. Climate Normals 1991–2020, San Luis Obispo Ap station (2.8 mi from downtown). Sunrise and sunset are calculated for September 15 at the city’s coordinates.