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Fullerton Weather Warning NWS WEATHER ALERT FOR THE FULLERTON, CA AREA - Issued: 904 PM PDT Fri Jul 31 2026 Fullerton Weather Warning

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92831 Weather (Fullerton, CA)

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Clear at Fullerton (92831), temperature is 75°F24°C, dew point 66°F19°C, humidity 73%. Wind direction is SSW at 3 mphat 5 km/h with visibility of 10 mi16 km. Barometric pressure is 29.92 in1013 mb. Last update: 10:40 pm.*
*Time is approximately 10:40 pm Fri, Jul 31, 2026. Time will be within 15 minutes of current local time. Fullerton weather forecast data is updated every 15 minutes.

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On one hand, weather prediction is a paradox. In the other, a warm pair of socks. ―Guy Lawrence
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Fullerton CA Weather - 1:40 am

Fullerton Weather Forecast

Weather forecast for: Fullerton CA
Last Update: 9:06 pm PDT Jul 31, 2026
Tonight: Partly cloudy, with a low around 68. South wind around 5 mph becoming calm.
Saturday: Partly sunny, then gradually becoming sunny, with a high near 92. Light southwest wind increasing to 5 to 10 mph in the afternoon.
Saturday Night: Mostly clear, with a low around 70. Southwest wind around 5 mph becoming calm in the evening.
Sunday: Sunny, with a high near 93. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Sunday Night: Mostly clear, with a low around 69. South wind around 5 mph becoming calm after midnight.
Monday: Sunny, with a high near 88.
Monday Night: Increasing clouds, with a low around 68.
Tuesday: Partly sunny, then gradually becoming sunny, with a high near 88.
Tuesday Night: Mostly clear, with a low around 68.
Wednesday: Sunny, with a high near 88.
Wednesday Night: Mostly clear, with a low around 68.
Thursday: Sunny, with a high near 89.
Thursday Night: Mostly clear, with a low around 68.
Friday: Sunny, with a high near 88.

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