Fullerton, CA Weather Forecast
Local 7-day forecast
Patchy Fog then Haze
Track current conditions, temperature changes, wind, and the full daily outlook for Fullerton, CA in one place.
Patchy fog before 8am, then haze and patchy fog between 8am and 2pm. Sunny, with a high near 86. South 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: Jul 8, 2026 7:44 AM PDT.
The active forecast window currently covers Jul 9 to Jul 14, 2026 for Fullerton, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 9 to Jul 14, 2026
- Latest sync
- Jul 8, 2026 7:44 AM PDT
- Forecast office
- SGX
- Source
- NOAA / NWS
Daily Outlook
This Week in Fullerton
Tuesday looks like the warmest upcoming period in Fullerton at 89 degrees F.
Thursday Night is the coolest period ahead with temperatures near 66 degrees F.
The strongest winds are forecast for Thursday at about 0 to 10 mph S.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 8, 2026 7:44 AM 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
Patchy fog after 5am. Partly cloudy, with a low around 66. South wind 0 to 10 mph.
Patchy fog before 11am. Sunny, with a high near 84.
Partly cloudy, with a low around 66.
Partly sunny, with a high near 83.
A slight chance of rain showers after 5am. Mostly cloudy, with a low around 68.
A slight chance of rain showers before 11am. Partly sunny, with a high near 84.
A slight chance of rain showers between 11pm and 5am. Partly cloudy, with a low around 68.
Mostly sunny, with a high near 87.
Partly cloudy, with a low around 69.
Mostly sunny, with a high near 89.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Jul 9
|
Patchy Fog then Haze
|
86°F |
0 to 10 mph
S
|
|
Thursday Night
Jul 9
|
Partly Cloudy then Patchy Fog
|
66°F |
0 to 10 mph
S
|
|
Friday
Jul 10
|
Patchy Fog then Sunny
|
84°F |
0 to 10 mph
S
|
|
Friday Night
Jul 10
|
Partly Cloudy
|
66°F |
0 to 10 mph
S
|
|
Saturday
Jul 11
|
Partly Sunny
|
83°F |
0 to 10 mph
S
|
|
Saturday Night
Jul 11
|
Mostly Cloudy then Slight Chance Rain Showers
|
68°F |
0 to 10 mph
S
|
|
Sunday
Jul 12
|
Slight Chance Rain Showers then Partly Sunny
|
84°F |
0 to 10 mph
S
|
|
Sunday Night
Jul 12
|
Slight Chance Rain Showers
|
68°F |
0 to 10 mph
SW
|
|
Monday
Jul 13
|
Mostly Sunny
|
87°F |
0 to 10 mph
SW
|
|
Monday Night
Jul 13
|
Partly Cloudy
|
69°F |
0 to 10 mph
SW
|
|
Tuesday
Jul 14
|
Mostly Sunny
|
89°F |
0 to 10 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Fullerton.
