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19°
Mostly Cloudy
Feels Like: 17°
Min: 16°
Max: 25°
The next few hours will be mostly clear, with today reaching 25°C and dropping to 17°C. The coming days will be partly cloudy until night.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:44
Sunrise
18:54
Sunset
Moon
Waxing Crescent
12:21
Moonrise
21:23
Moonset
Daily Forecast
Today
Thursday
Friday
Saturday
Sunday
Monday
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Friday
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Humidity
Weather in Simi Valley today, September 16, 2026
Simi Valley starts September 16, 2026 under largely sunny skies, with bright spells setting the tone from the outset. Outdoor plans should enjoy long stretches of open sky as the day unfolds. The morning sky stays heavily clouded, with cover near 97% around 01:00. Grey conditions set the early tone before any later change.
Temperatures climb from an overnight low near 16°C toward a daytime high of about 25°C. Relative humidity sits between 52% and 95%, reaching its peak around 04:00. Airflow remains manageable, reaching about 5.0 km/h around 14:00.
Through the afternoon skies look more workable, with cloud near 34% around 12:00. Later outdoor plans have a clearer window than the morning may have suggested. Visibility stays generally good near 15.7 km on average, though it can drop toward 13.8 km in thicker cloud or showers. The sun rises at 06:44 and sets at 18:54, for a total of 12 hours 9 minutes of sunlight today.
The practical takeaway for Simi Valley is a bright September 16, 2026, ideal for outdoor errands before temperatures ease from about 25°C.
Frequently asked questions about weather in Simi Valley
How warm does it get in Simi Valley?
The warmest month in Simi Valley is August, with average high temperatures of 30°C. The average temperature during this period is around 24°C.
How cold does it get in Simi Valley?
The coldest month in Simi Valley is January, with average low temperatures of 8°C. The average temperature during this period is around 12°C.
What is the wettest time of year in Simi Valley?
The wettest month in Simi Valley is January, with an average of 92mm of precipitation.
What is the driest time of year in Simi Valley?
The driest month in Simi Valley is July, with an average of 1mm of precipitation.
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