Fullerton, CA Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Fullerton, CA in one place.
Sunny, with a high near 94. Southwest wind 0 to 10 mph.
Local Weather Overview
This forecast page for Fullerton, CA is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Aug 21, 2026 5:09 PM PDT.
The active forecast window currently covers Aug 23 to Aug 27, 2026 for Fullerton, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Aug 23 to Aug 27, 2026
- Latest sync
- Aug 21, 2026 5:09 PM PDT
- Forecast office
- SGX
- Source
- NOAA / NWS
Daily Outlook
This Week in Fullerton
Tuesday looks like the warmest upcoming period in Fullerton at 97 degrees F.
Sunday Night is the coolest period ahead with temperatures near 72 degrees F.
The strongest winds are forecast for Sunday at about 0 to 10 mph SW.
The forecast from Aug 23 through Aug 27 stays mostly dry.
Forecast Details
- Last updated
- Aug 21, 2026 5:09 PM PDT
- Coverage
- 6 days
- Time zone
- America/Los_Angeles
- Forecast office
- SGX
- Radar station
- KSOX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 72.
Sunny, with a high near 94.
Mostly clear, with a low around 73.
Sunny, with a high near 97.
Mostly clear, with a low around 74.
Sunny, with a high near 96.
Partly cloudy, with a low around 73.
Sunny, with a high near 94.
Partly cloudy, with a low around 73.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
Aug 23
|
Sunny
|
94°F |
0 to 10 mph
SW
|
|
Sunday Night
Aug 23
|
Mostly Clear
|
72°F |
0 to 5 mph
S
|
|
Monday
Aug 24
|
Sunny
|
94°F |
0 to 10 mph
S
|
|
Monday Night
Aug 24
|
Mostly Clear
|
73°F |
0 to 10 mph
SW
|
|
Tuesday
Aug 25
|
Sunny
|
97°F |
0 to 10 mph
SW
|
|
Tuesday Night
Aug 25
|
Mostly Clear
|
74°F |
0 to 10 mph
S
|
|
Wednesday
Aug 26
|
Sunny
|
96°F |
0 to 10 mph
S
|
|
Wednesday Night
Aug 26
|
Partly Cloudy
|
73°F |
0 to 10 mph
S
|
|
Thursday
Aug 27
|
Sunny
|
94°F |
0 to 5 mph
S
|
|
Thursday Night
Aug 27
|
Partly Cloudy
|
73°F |
0 to 5 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Fullerton.
