| NWS Forecast for: Fullerton CA Issued by: National Weather Service San Diego, CA Last Update: 4:14 am PDT Sep 8, 2026 |  |
Today: Mostly sunny, with a high near 96. Light and variable wind becoming west 5 to 10 mph in the afternoon. Tonight: Mostly clear, with a low around 75. West wind around 5 mph becoming calm in the evening. Wednesday: Sunny, with a high near 99. Heat index values as high as 110. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Wednesday Night: Mostly clear, with a low around 75. South wind around 5 mph becoming calm after midnight. Thursday: Sunny, with a high near 93. Calm wind becoming southwest around 5 mph in the afternoon. Thursday Night: Mostly clear, with a low around 71. Friday: Sunny, with a high near 88. Friday Night: Mostly clear, with a low around 67. Saturday: Sunny, with a high near 83. Saturday Night: Mostly clear, with a low around 65. Sunday: Sunny, with a high near 84. Sunday Night: Clear, with a low around 65. Monday: Sunny, with a high near 85. | |
| Fullerton CA 33.87°N 117.93°W (Elev. 184 ft) | |
Visit your local NWS office at: https://www.weather.gov/sgx |
