Weather · September
Mission Viejo weather in September
Average highs of 81°F, lows of 59°F and 0.20 in of rain, from 30 years of weather records.
September is Mission Viejo’s 2nd warmest month, with average highs of 81°F and lows of 59°F. That is about the same as August, and 7° above the yearly average high.
- Average high
- 81°F
- Average low
- 59°F
- Precipitation
- 0.20 in
- Wet days
- 1
- Sunrise · sunset
- 6:33 AM · 6:58 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 Mission Viejo in September
Guides for this month: Halloween in Mission Viejo.
See all upcoming events.
September compared with the months around it
Planning a trip? See the best time to visit Mission Viejo and today’s forecast.
Questions
How hot does it get in Mission Viejo in September?
Average highs are 81°F and average lows 59°F, for a daily mean of 70°F. Individual days run hotter or colder than these 30-year averages.
Does it rain in Mission Viejo in September?
September averages 0.20 in of precipitation over about 1 days with at least 0.01 in. It is the 9th wettest month of the year.
What time is sunset in Mission Viejo in September?
Around mid-September the sun rises about 6:33 AM and sets about 6:58 PM, for roughly 12.4 hours of daylight.
Is September a good time to visit Mission Viejo?
The mildest months for visiting are June, July, August. September is warm, with Halloween events.
NOAA U.S. Climate Normals 1991–2020, Laguna Beach station (7.9 mi from downtown). Sunrise and sunset are calculated for September 15 at the city’s coordinates.