Fullerton, CA Weather Forecast
Local 7-day forecast
Mostly Clear
Track current conditions, temperature changes, wind, and the full daily outlook for Fullerton, CA in one place.
Mostly clear, with a low around 70. Northwest wind around 0 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: Oct 8, 2026 6:01 AM PDT.
The active forecast window currently covers Oct 8 to Oct 14, 2026 for Fullerton, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 8 to Oct 14, 2026
- Latest sync
- Oct 8, 2026 6:01 AM PDT
- Forecast office
- SGX
- Source
- NOAA / NWS
Daily Outlook
This Week in Fullerton
Thursday looks like the warmest upcoming period in Fullerton at 94 degrees F.
Monday Night is the coolest period ahead with temperatures near 57 degrees F.
The strongest winds are forecast for Sunday at about 5 to 15 mph S.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 8, 2026 6:01 AM PDT
- Coverage
- 7 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
Sunny, with a high near 94. West wind 0 to 10 mph.
Patchy fog after 5am. Mostly clear, with a low around 69. West wind 0 to 5 mph.
Patchy fog before 11am. Sunny, with a high near 88. West wind 0 to 10 mph.
Partly cloudy, with a low around 68. South wind 0 to 5 mph.
Mostly cloudy, with a high near 81.
A chance of rain showers after 11pm. Mostly cloudy, with a low around 67.
A chance of rain showers. Mostly cloudy, with a high near 76.
Rain showers likely. Mostly cloudy, with a low around 61.
Rain showers likely. Mostly cloudy, with a high near 72.
A chance of rain showers. Mostly cloudy, with a low around 57.
A chance of rain showers. Partly sunny, with a high near 73.
A slight chance of rain showers before 5am. Partly cloudy, with a low around 58.
Sunny, with a high near 76.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Oct 8
|
Mostly Clear
|
70°F |
0 mph
|
|
Thursday
Oct 8
|
Sunny
|
94°F |
0 to 10 mph
W
|
|
Thursday Night
Oct 8
|
Mostly Clear then Patchy Fog
|
69°F |
0 to 5 mph
W
|
|
Friday
Oct 9
|
Patchy Fog then Sunny
|
88°F |
0 to 10 mph
W
|
|
Friday Night
Oct 9
|
Partly Cloudy
|
68°F |
0 to 5 mph
S
|
|
Saturday
Oct 10
|
Mostly Cloudy
|
81°F |
0 to 10 mph
S
|
|
Saturday Night
Oct 10
|
Chance Rain Showers
|
67°F |
5 mph
W
|
|
Sunday
Oct 11
|
Chance Rain Showers
|
76°F |
5 to 15 mph
S
|
|
Sunday Night
Oct 11
|
Rain Showers Likely
|
61°F |
5 to 15 mph
SW
|
|
Columbus Day
Oct 12
|
Rain Showers Likely
|
72°F |
5 mph
S
|
|
Monday Night
Oct 12
|
Chance Rain Showers
|
57°F |
0 to 10 mph
W
|
|
Tuesday
Oct 13
|
Chance Rain Showers
|
73°F |
0 to 10 mph
W
|
|
Tuesday Night
Oct 13
|
Slight Chance Rain Showers
|
58°F |
5 to 10 mph
W
|
|
Wednesday
Oct 14
|
Sunny
|
76°F |
0 to 10 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Fullerton.
