See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
21°
Overcast
Feels Like: 20°
Min: 20°
Max: 26°
The next few hours will be overcast, with today reaching 26°C and dropping to 18°C. The coming days will be clear from afternoon until night.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:40
Sunrise
18:50
Sunset
Moon
Waxing Crescent
12:16
Moonrise
21:21
Moonset
Daily Forecast
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Thursday
Friday
Saturday
Sunday
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Friday
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Weather in Fullerton today, September 16, 2026
Fullerton looks cloudy on September 16, 2026, with grey skies for much of the day. Sunshine stays limited, so the overall tone is muted from the morning onward. Expect a grey start, with morning cloud around 100% by 02:00. Outdoor plans early on should not rely on bright skies.
Expect highs of 26°C and cooler readings close to 20°C. Expect humidity between 53% and 84%, most humid near 23:00. Winds stay light, near 4.0 km/h by 16:00, so the day feels still more than breezy.
The afternoon keeps an overcast feel, as cloud reaches about 91% around 12:00. Outdoor plans may still want a flexible backup. Expect visibility around 16.1 km. The sun rises at 06:40 and sets at 18:50, for a total of 12 hours 9 minutes of sunlight today.
The practical takeaway for Fullerton on September 16, 2026 is a cloudy day that stays usable, just not particularly bright, around 26°C.
Frequently asked questions about weather in Fullerton
How warm does it get in Fullerton?
The warmest month in Fullerton is August, with average high temperatures of 27°C. The average temperature during this period is around 23°C.
How cold does it get in Fullerton?
The coldest month in Fullerton is January, with average low temperatures of 10°C. The average temperature during this period is around 14°C.
What is the wettest time of year in Fullerton?
The wettest month in Fullerton is January, with an average of 74mm of precipitation.
What is the driest time of year in Fullerton?
The driest month in Fullerton is July, with an average of 1mm of precipitation.
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