Hazardous Weather Conditions
Current conditions at
FW0063 Fullerton CSU (F0063)
Lat: 33.8805°NLon: 117.88417°WElev: 243.01ft.NA
81°F
27°C
| Humidity | 63% |
| Wind Speed | S 5 MPH |
| Barometer | 29.85 in (1010.84 mb) |
| Dewpoint | 67°F (19°C) |
| Visibility | NA |
| Heat Index | 84°F (29°C) |
| Last update | 11 Sep 07:08 PM PDT |
Extended Forecast for
Fullerton CA
Heat Advisory September 11, 07:26pm until September 11, 08:00pm
NOW until 8:00pm Fri

Heat Advisory
Tonight

Low: 69 °F
Increasing
CloudsSaturday

High: 89 °F
Sunny
Saturday Night

Low: 68 °F
Mostly Clear
Sunday
High: 86 °F
Patchy Fog
then SunnySunday Night

Low: 66 °F
Mostly Clear
Monday

High: 85 °F
Sunny
Monday Night

Low: 65 °F
Mostly Clear
Tuesday

High: 82 °F
Sunny
Detailed Forecast
Tonight
Increasing clouds, with a low around 69. Southwest wind around 5 mph becoming calm after midnight.
Saturday
Sunny, with a high near 89. Light south wind becoming southwest 5 to 10 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 68. South wind around 5 mph.
Sunday
Patchy fog before 11am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 86. South wind 5 to 10 mph becoming southwest in the afternoon.
Sunday Night
Mostly clear, with a low around 66. Southwest wind around 5 mph becoming southeast after midnight.
Monday
Sunny, with a high near 85.
Monday Night
Mostly clear, with a low around 65.
Tuesday
Sunny, with a high near 82.
Tuesday Night
Mostly clear, with a low around 63.
Wednesday
Sunny, with a high near 85.
Wednesday Night
Mostly clear, with a low around 65.
Thursday
Sunny, with a high near 89.
Thursday Night
Mostly clear, with a low around 67.
Friday
Sunny, with a high near 92.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Fullerton CA
33.87°N 117.93°W (Elev. 184 ft)
33.87°N 117.93°W (Elev. 184 ft)
11:51 am PDT Sep 11, 2026
7pm PDT Sep 11, 2026-6pm PDT Sep 18, 2026



