Weather · August
San Luis Obispo weather in August
Average highs of 79°F, lows of 55°F and 0.00 in of rain, from 30 years of weather records.
August is San Luis Obispo’s 2nd warmest month, with average highs of 79°F and lows of 55°F. That is 1° warmer than July, and 7° above the yearly average high.
- Average high
- 79°F
- Average low
- 55°F
- Precipitation
- 0.00 in
- Wet days
- 1
- Sunrise · sunset
- 6:22 AM · 7:52 PM
What to wear in August
- Warm days: shorts and T-shirts, with a light layer for cooler evenings.
What August weather is good for
August 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 August?
Average highs are 79°F and average lows 55°F, for a daily mean of 67°F. Individual days run hotter or colder than these 30-year averages.
Does it rain in San Luis Obispo in August?
August averages 0.00 in of precipitation over about 1 days with at least 0.01 in. It is the 11th wettest month of the year.
What time is sunset in San Luis Obispo in August?
Around mid-August the sun rises about 6:22 AM and sets about 7:52 PM, for roughly 13.5 hours of daylight.
Is August a good time to visit San Luis Obispo?
Yes. August 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 August 15 at the city’s coordinates.