Fullerton, CA Weather Forecast
Local 7-day forecast
Mostly Sunny then Slight Chance Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Fullerton, CA in one place.
A slight chance of rain showers after 5pm. Mostly sunny, with a high near 75. Southwest wind 0 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
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: Apr 9, 2026 2:19 AM PDT.
The active forecast window currently covers Apr 10 to Apr 15, 2026 for Fullerton, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 10 to Apr 15, 2026
- Latest sync
- Apr 9, 2026 2:19 AM PDT
- Forecast office
- SGX
- Source
- NOAA / NWS
Daily Outlook
This Week in Fullerton
Wednesday looks like the warmest upcoming period in Fullerton at 77 degrees F.
Sunday Night is the coolest period ahead with temperatures near 50 degrees F.
The strongest winds are forecast for Sunday at about 5 to 15 mph SW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 9, 2026 2:19 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
A chance of rain showers. Partly cloudy, with a low around 58. West wind 5 to 10 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
A slight chance of rain showers. Mostly sunny, with a high near 70. Chance of precipitation is 20%.
Rain showers likely before 5am, then showers and thunderstorms likely. Mostly cloudy, with a low around 57.
Showers and thunderstorms likely. Partly sunny, with a high near 67.
A slight chance of rain showers before 5am. Partly cloudy, with a low around 50.
Sunny, with a high near 68.
Mostly clear, with a low around 50.
Sunny, with a high near 74.
Mostly clear, with a low around 52.
Mostly sunny, with a high near 77.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Apr 10
|
Mostly Sunny then Slight Chance Rain Showers
|
75°F |
0 to 10 mph
SW
|
|
Friday Night
Apr 10
|
Chance Rain Showers
|
58°F |
5 to 10 mph
W
|
|
Saturday
Apr 11
|
Slight Chance Rain Showers
|
70°F |
0 to 10 mph
W
|
|
Saturday Night
Apr 11
|
Rain Showers Likely
|
57°F |
5 to 10 mph
SW
|
|
Sunday
Apr 12
|
Showers And Thunderstorms Likely
|
67°F |
5 to 15 mph
SW
|
|
Sunday Night
Apr 12
|
Slight Chance Rain Showers
|
50°F |
5 to 10 mph
W
|
|
Monday
Apr 13
|
Sunny
|
68°F |
5 to 10 mph
W
|
|
Monday Night
Apr 13
|
Mostly Clear
|
50°F |
0 to 10 mph
SW
|
|
Tuesday
Apr 14
|
Sunny
|
74°F |
0 to 10 mph
S
|
|
Tuesday Night
Apr 14
|
Mostly Clear
|
52°F |
0 to 10 mph
SW
|
|
Wednesday
Apr 15
|
Mostly Sunny
|
77°F |
0 to 10 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Fullerton.
