Fullerton, California weather
United States · America/Los_Angeles · 33.87, -117.92
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Fullerton, CA Weather Today
Current conditions, hourly and 7 day forecast, official severe weather alerts, and air quality for Fullerton, California. Every section shows where the data came from and when it was last checked.
Your briefing — take action
Fullerton, California
- Right now
- Wind Advisory in effect for Orange County Inland.Official warning
- Next few hours
- No rain in the forecast for the next few hours.Forecast
- Your day
- UV index 6 — sunburn risk during the strongest sun.Observed
What officials say to do
- Winds this strong can make driving difficult, especially for high profile vehicles.
- Use extra caution.
- Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
- Take extra precautions when outside.
- Wear lightweight and loose fitting clothing.
- Try to limit strenuous activities to early morning or evening.
Wording from NWS San Diego CA. Read the official warning
What happens next
- NowWind Advisory covers Orange County Inland.Official warning
- NextOfficial warning runs until 12:00 AM.Official warning
Official warnings for this location come from NOAA / National Weather Service. Lines marked Our reading are WeatherSignal’s reading of the measurements and forecast, not an official statement.
Fullerton, California
89°
Clear sky
Feels like 89° · High 94° · Low 89°
Clear sky here right now. Nothing falling.
Warm and clear this evening. 89° right now. Sunset is at 11:00 AM. Temperatures are still climbing for now.
- Sunset 11:00 AM
- Overnight low 89°
- Rain this evening 0%
Next few hours
Now
89°
—
12 PM
91°
—
1 PM
92°
—
2 PM
93°
—
3 PM
94°
—
- Rain chance
- 0%
- Wind
- 15 mph NE
- Humidity
- 18%
- Air quality
- No reading
Source updated: 6:48:05 PM · WeatherSignal checked: 6:48:05 PM
What matters today
Six quick answers for Fullerton. Tap Why? on any of them to see the reasoning.
Umbrella
Nah (Good)
Best time
5 AM (Good)
Dog walk
11 PM (Good)
Car wash
Go for it (Good)
Cookout
Green light (Good)
Windows
Crack them (Mixed)
Today's Signal
Good day
72/100
Mostly favorable, but the warmth, the wind and poor visibility will make it less comfortable outside.
Feels like 89° · Wind 15 mph · Visibility 0.0 mi · Active Wind Advisory
Today is about 15° warmer than the rest of the week.
See exactly how this number was worked out
Every location starts at 100. Points come off for heat, cold, rain, wind, UV, humidity, poor visibility, and any official alert. Nothing is ever added back.
- Starting score100
- Feels like 89°: warm-8
- Wind 15 mph-4
- Visibility 0.0 mi-10
- Active Wind Advisory-6
- Final Signal72
Next 12 hours
Steady conditions, but the temperature swings about 15° across the next 12 hours.
- 3 PMWarmest stretch · 94°
- 11 PMCoolest stretch · 79°
- 11 PMSunrise
- 12 PM—91 degrees, 0 percent chance of rain
- 1 PM—92 degrees, 0 percent chance of rain
- 2 PM—93 degrees, 0 percent chance of rain
- 3 PM—94 degrees, 0 percent chance of rain
- 4 PM—94 degrees, 0 percent chance of rain
- 5 PM—93 degrees, 0 percent chance of rain
- 6 PM—90 degrees, 0 percent chance of rain
- 7 PM—87 degrees, 0 percent chance of rain
- 8 PM—85 degrees, 0 percent chance of rain
- 9 PM—83 degrees, 0 percent chance of rain
- 10 PM—81 degrees, 0 percent chance of rain
- 11 PM—79 degrees, 0 percent chance of rain
The line is temperature by hour. The number under each hour is the chance of rain. Scroll sideways for the full 12 hours.
Next change
It keeps cooling down overnight
Temperatures fall from about 91° to 79° over the next 12 hours. There is no meaningful rain signal in the next several hours.
WeatherSignal NOW: Fullerton, California
One number for everything happening around you, from 0 to 100.
92
NORMAL
Nothing here needs your attention right now.
Tap any line to see exactly what added or subtracted points. Every rule is published on our methodology page. This is an informational signal, not a safety rating: official warnings always come first.
What this means
Generated from the forecast values above using fixed rules: not an AI guess.
- A Wind Advisory issued by NWS San Diego CA is active for Orange County Inland.
- No significant precipitation is expected in the next 24 hours.
Next 24 hours
Will it rain during your commute? When does the storm arrive?
See all 47 hours (2 days) — free
| Time | Condition | Temp | Feels | Precip % | Amount | Wind | Humidity |
|---|---|---|---|---|---|---|---|
| 12 PM | Clear sky | 91° | 91° | 0% | 0.00″ | 18 ENE | 16% |
| 1 PM | Clear sky | 92° | 92° | 0% | 0.00″ | 19 ENE | 16% |
| 2 PM | Clear sky | 93° | 93° | 0% | 0.00″ | 17 ENE | 16% |
| 3 PM | Clear sky | 94° | 94° | 0% | 0.00″ | 16 ENE | 15% |
| 4 PM | Clear sky | 94° | 94° | 0% | 0.00″ | 15 E | 15% |
| 5 PM | Clear sky | 93° | 93° | 0% | 0.00″ | 12 E | 16% |
| 6 PM | Clear sky | 90° | 90° | 0% | 0.00″ | 10 ENE | 17% |
| 7 PM | Clear sky | 87° | 87° | 0% | 0.00″ | 11 ENE | 20% |
| 8 PM | Clear sky | 85° | 85° | 0% | 0.00″ | 11 ENE | 22% |
| 9 PM | Clear sky | 83° | 83° | 0% | 0.00″ | 11 ENE | 23% |
| 10 PM | Clear sky | 81° | 81° | 0% | 0.00″ | 12 NE | 25% |
| 11 PM | Clear sky | 79° | 79° | 0% | 0.00″ | 12 NE | 27% |
| 12 AM | Clear sky | 78° | 78° | 0% | 0.00″ | 11 NE | 28% |
| 1 AM | Clear sky | 77° | 77° | 0% | 0.00″ | 11 NE | 29% |
| 2 AM | Partly cloudy | 76° | 76° | 0% | 0.00″ | 10 NE | 29% |
| 3 AM | Partly cloudy | 75° | 75° | 0% | 0.00″ | 10 NE | 29% |
| 4 AM | Clear sky | 75° | 75° | 0% | 0.00″ | 9 NE | 28% |
| 5 AM | Clear sky | 74° | 74° | 0% | 0.00″ | 9 NE | 28% |
| 6 AM | Clear sky | 74° | 74° | 0% | 0.00″ | 9 ENE | 26% |
| 7 AM | Partly cloudy | 75° | 75° | 0% | 0.00″ | 10 ENE | 24% |
| 8 AM | Partly cloudy | 77° | 77° | 0% | 0.00″ | 9 ENE | 20% |
| 9 AM | Partly cloudy | 81° | 81° | 0% | 0.00″ | 7 NNE | 17% |
| 10 AM | Partly cloudy | 85° | 85° | 0% | 0.00″ | 11 NE | 15% |
| 11 AM | Overcast | 88° | 88° | 0% | 0.00″ | 12 E | 12% |
7-day forecast
Confidence decreases the further out you look.
Today
Clear sky
94° / 89°
- Precip:
- 0% · 0.00″
- Wind:
- 19 mph
- UV:
- 6.0
- Sun:
- 11 PM to 11 AM
Sat, Oct 17
Clear sky
93° / 74°
- Precip:
- 0% · 0.00″
- Wind:
- 12 mph
- UV:
- 6.0
- Sun:
- 11 PM to 11 AM
Sun, Oct 18
Partly cloudy
88° / 69°
- Precip:
- 0% · 0.00″
- Wind:
- 9 mph
- UV:
- 6.1
- Sun:
- 11 PM to 11 AM
Mon, Oct 19
Clear sky
84° / 67°
- Precip:
- 0% · 0.00″
- Wind:
- 9 mph
- UV:
- 0.4
- Sun:
- 11 PM to 11 AM
Tue, Oct 20
Clear sky
76° / 62°
- Precip:
- 0% · 0.00″
- Wind:
- 6 mph
- UV:
- 0.0
- Sun:
- 11 PM to 11 AM
Lower confidence: long-range outlook, not a certainty.
Wed, Oct 21
Clear sky
68° / 57°
- Precip:
- 0% · 0.00″
- Wind:
- 8 mph
- UV:
- 0.0
- Sun:
- 11 PM to 11 AM
Lower confidence: long-range outlook, not a certainty.
Thu, Oct 22
Clear sky
66° / 55°
- Precip:
- 0% · 0.00″
- Wind:
- 8 mph
- UV:
- 0.0
- Sun:
- 11 PM to 11 AM
Lower confidence: long-range outlook, not a certainty.
Forecasts describe likely conditions, not guaranteed outcomes. Official warnings from your national weather service always take precedence over anything shown here.
Fullerton hourly weather
Hour by hour, out to eight days ahead.
Fullerton 7 day forecast
Highs, lows and rain chance for the week.
Air quality detail
Pollutants, category, and official guidance.