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Hourly Forecast
Daylight Hours
06:39
Sunrise
18:49
Sunset
Moon
Waxing Crescent
12:14
Moonrise
21:21
Moonset
Daily Forecast
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Sunday
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Air Quality Data Available
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UV Index
Humidity
Weather in San Juan Capistrano today, September 16, 2026
San Juan Capistrano stays under cloudy skies on September 16, 2026, with only brief brighter breaks. Plan for a day that feels grey more often than open. The first half of the day looks overcast, as cloud amounts reach about 100% around 05:00. Brighter weather, if it comes, waits until later.
Temperatures climb from an overnight low near 18°C toward a daytime high of about 22°C. Moisture in the air spans 70%-92%, with the highest values around 08:00. Winds stay light, near 3.2 km/h by 14:00, so the day feels still more than breezy.
Expect persistent cloud later on, with amounts around 100% by 12:00. Sunshine remains the exception, not the rule. Visibility stays generally good near 15.2 km on average, though it can drop toward 9.3 km in thicker cloud or showers. Sunrise is at 06:39 and sunset at 18:49, giving 12 hours 9 minutes of sunlight today.
Overall, San Juan Capistrano on September 16, 2026 stays grey and muted, so outdoor plans may want a flexible backup even with a high near 22°C.
Frequently asked questions about weather in San Juan Capistrano
How warm does it get in San Juan Capistrano?
The warmest month in San Juan Capistrano is August, with average high temperatures of 24°C. The average temperature during this period is around 22°C.
How cold does it get in San Juan Capistrano?
The coldest month in San Juan Capistrano is February, with average low temperatures of 11°C. The average temperature during this period is around 14°C.
What is the wettest time of year in San Juan Capistrano?
The wettest month in San Juan Capistrano is January, with an average of 70mm of precipitation.
What is the driest time of year in San Juan Capistrano?
The driest month in San Juan Capistrano is July, with an average of 1mm of precipitation.
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