Live Weather & Forecast
Weather in Fullerton
California, United States · Real-time conditions & 3-day outlook
15°C
Feels like 15°C
60°F / Feels 60°F
Cloudy
Fullerton, California
🌙 Nighttime
Updated: 2026-04-13 00:00
Humidity
72%
Wind
6.8 km/h WSW
Wind Gust
9.4 km/h
Pressure
1017 mb
Visibility
16 km
UV Index
0
(Low)
Precipitation
0 mm
Cloud Cover
0%
Dew Point
8.4°C
Wind Degree
248°
Air Quality Index
US EPA: Good
UK DEFRA: Low (2)
CO
238.9 μg/m³
NO₂
21.3 μg/m³
O₃
60 μg/m³
SO₂
12.1 μg/m³
PM 2.5
13.7 μg/m³
PM 10
15.6 μg/m³
Weather Alerts 1
Met
· Moderate · Expected
Wind Advisory issued April 12 at 12:39AM PDT until April 12 at 10:00PM PDT by NWS Los Angeles/Oxnard CA
* WHAT...Southwest winds 20 to 30 mph with gusts up to 45 mph expected. Isolated gusts to around 55 mph near Lake Palmdale. * WHERE...Eastern Antelope Valley Foothills and Western Antelope Valley Foothills. * WHEN...Until 10 PM PDT this evening. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.
Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.
Today's Hourly Forecast
24-hour breakdown for Fullerton, California
12 AM
13°
Clear
1 AM
15°
Cloudy
2 AM
12°
Partly Cloudy
3 AM
11°
Clear
4 AM
11°
Clear
5 AM
10°
Clear
6 AM
10°
Clear
7 AM
12°
Sunny
8 AM
14°
Sunny
9 AM
15°
Sunny
10 AM
15°
Sunny
11 AM
15°
Light rain shower
12 PM
15°
Overcast
1 PM
16°
Partly Cloudy
2 PM
17°
Partly Cloudy
3 PM
17°
Partly Cloudy
4 PM
17°
Partly Cloudy
5 PM
17°
Partly Cloudy
6 PM
17°
Partly Cloudy
7 PM
16°
Sunny
8 PM
15°
Partly Cloudy
9 PM
15°
Clear
10 PM
15°
Clear
11 PM
14°
Clear
3-Day Forecast
Daily overview for Fullerton, California
Today
Patchy rain nearby
18°
/
10°
🌧️ 75% chance of rain
💧 Avg. humidity: 65%
💨 Max wind: 27.4 km/h
🌧️ Total precip: 1.25 mm
☀️ UV Index: 1.6
🌅 Sunrise: 06:23 AM
🌇 Sunset: 07:22 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Sunny
23°
/
12°
🌧️ 0% chance of rain
💧 Avg. humidity: 65%
💨 Max wind: 19.8 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.8
🌅 Sunrise: 06:22 AM
🌇 Sunset: 07:23 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Wed, Apr 15
Partly Cloudy
21°
/
13°
🌧️ 0% chance of rain
💧 Avg. humidity: 71%
💨 Max wind: 18 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.6
🌅 Sunrise: 06:20 AM
🌇 Sunset: 07:23 PM
🌙 Waning Crescent
🌑 Moon: 8% lit
Best Time to Visit Fullerton
Plan your trip to Fullerton, United States around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in Fullerton?
Current conditions in Fullerton: Cloudy, temperature 15°C, humidity 72%.
What is the best time to visit Fullerton?
The best time to visit Fullerton is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Fullerton?
Fullerton is located at approximately 33.9° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Fullerton?
The wettest period in Fullerton is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Fullerton?
For visits to Fullerton during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Fullerton in?
Fullerton is located in United States, in the state of California.
What are the public holidays in Fullerton in 2026?
View the 2026 public holidays for Fullerton on our Holidays page.
What are the GPS coordinates used for the weather forecast in Fullerton?
The weather forecast for Fullerton uses coordinates 33.8708, -117.9294.