| National Weather Service Forecast for:
Fullerton CA Issued by: National Weather Service San Diego, CA |
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| Updated: 12:14 pm PDT Apr 6, 2026 | ||||||||||||||||||
|
| Tonight |
Mostly cloudy, with a low around 57. South wind around 5 mph becoming calm. |
| Tuesday |
Mostly cloudy, then gradually becoming sunny, with a high near 78. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. |
| Tuesday Night |
Mostly clear, with a low around 56. Southwest wind around 5 mph becoming calm in the evening. |
| Wednesday |
Mostly sunny, with a high near 80. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. |
| Wednesday Night |
Increasing clouds, with a low around 58. Southwest wind around 5 mph becoming calm after midnight. |
| Thursday |
Partly sunny, with a high near 78. |
| Thursday Night |
Mostly cloudy, with a low around 57. |
| Friday |
A slight chance of showers after 11am. Partly sunny, with a high near 75. |
| Friday Night |
A slight chance of showers and thunderstorms, then a chance of showers after 11pm. Mostly cloudy, with a low around 57. |
| Saturday |
A chance of showers, then showers likely and possibly a thunderstorm after 11am. Mostly cloudy, with a high near 70. |
| Saturday Night |
A chance of showers. Mostly cloudy, with a low around 55. |
| Sunday |
A slight chance of showers. Partly sunny, with a high near 69. |
| Sunday Night |
Partly cloudy, with a low around 52. |
| Monday |
Partly sunny, with a high near 73. |
Forecast from NOAA-NWS for Fullerton CA.
