What is the weather in Fullerton right now?

Current weather in Fullerton is few clouds.

Where can I find the hourly weather forecast for Fullerton?

This page shows hourly weather forecast for Fullerton, including temperature, wind, precipitation, humidity and cloud cover.

Is the weather forecast for Fullerton updated regularly?

Weather data for Fullerton is updated regularly with the latest available observations and forecasts.

Now · 9:58 AM

Fullerton Weather & Hourly Forecast

United States · California · 92833

76°F

Mostly sunny

Feels like: 80°F

💧 Humidity 67% 🌡 Pressure 29.91 inHg 💨 Wind 2 mph 👁 Visibility 17.1 mi ☁ Clouds 14% ☀️ UV index 2.1 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Fullerton

Today

10:00 AM

Mostly sunny

76° 💧 0.000 in 💨 2 mph H 67%29.91 inHg

1:00 PM

Sunny

84° 💧 None 💨 5 mph H 50%29.85 inHg

4:00 PM

Sunny

84° 💧 None 💨 7 mph H 48%29.80 inHg

7:00 PM

Sunny

77° 💧 None 💨 5 mph H 62%29.80 inHg

10:00 PM

Clear night

73° 💧 None 💨 3 mph H 76%29.85 inHg

Tomorrow

1:00 AM

Clear night

69° 💧 None 💨 3 mph H 93%29.83 inHg

4:00 AM

Mist at night

66° 💧 None 💨 1 mph H 98%29.83 inHg

7:00 AM

Fog

66° 💧 None 💨 2 mph H 97%29.83 inHg

10:00 AM

Sunny

77° 💧 None 💨 2 mph H 62%29.85 inHg

1:00 PM

Sunny

84° 💧 None 💨 5 mph H 47%29.80 inHg

4:00 PM

Sunny

82° 💧 None 💨 7 mph H 51%29.77 inHg

7:00 PM

Sunny

73° 💧 None 💨 6 mph H 68%29.80 inHg

10:00 PM

Clear night

69° 💧 None 💨 3 mph H 82%29.85 inHg

Tuesday

1:00 AM

Clear night

67° 💧 None 💨 1 mph H 91%29.88 inHg

4:00 AM

Clear night

65° 💧 None 💨 1 mph H 94%29.88 inHg

7:00 AM

Mostly sunny

64° 💧 None 💨 2 mph H 94%29.88 inHg

Today

10:00 AM

Mostly sunny

76° 💧 0.000 in 💨 2 mph H 67%29.91 inHg

11:00 AM

Sunny

80° 💧 None 💨 4 mph H 58%29.88 inHg

12:00 PM

Sunny

82° 💧 None 💨 5 mph H 53%29.88 inHg

1:00 PM

Sunny

84° 💧 None 💨 5 mph H 50%29.85 inHg

2:00 PM

Sunny

85° 💧 None 💨 6 mph H 49%29.83 inHg

3:00 PM

Sunny

85° 💧 None 💨 7 mph H 48%29.83 inHg

4:00 PM

Sunny

84° 💧 None 💨 7 mph H 48%29.80 inHg

5:00 PM

Sunny

82° 💧 None 💨 6 mph H 50%29.80 inHg

6:00 PM

Sunny

80° 💧 None 💨 6 mph H 55%29.80 inHg

7:00 PM

Sunny

77° 💧 None 💨 5 mph H 62%29.80 inHg

8:00 PM

Clear night

75° 💧 None 💨 4 mph H 67%29.80 inHg

9:00 PM

Clear night

74° 💧 None 💨 3 mph H 71%29.83 inHg

10:00 PM

Clear night

73° 💧 None 💨 3 mph H 76%29.85 inHg

11:00 PM

Clear night

71° 💧 None 💨 3 mph H 84%29.85 inHg

Tomorrow

12:00 AM

Clear night

70° 💧 None 💨 3 mph H 90%29.83 inHg

1:00 AM

Clear night

69° 💧 None 💨 3 mph H 93%29.83 inHg

2:00 AM

Partly cloudy night

68° 💧 None 💨 3 mph H 96%29.83 inHg

3:00 AM

Partly cloudy night

67° 💧 None 💨 2 mph H 97%29.83 inHg

4:00 AM

Mist at night

66° 💧 None 💨 1 mph H 98%29.83 inHg

5:00 AM

Mist at night

66° 💧 None 💨 2 mph H 98%29.83 inHg

6:00 AM

Fog at night

66° 💧 None 💨 2 mph H 98%29.83 inHg

7:00 AM

Fog

66° 💧 None 💨 2 mph H 97%29.83 inHg

8:00 AM

Fog

69° 💧 None 💨 1 mph H 89%29.85 inHg

9:00 AM

Sunny

73° 💧 None 💨 2 mph H 76%29.85 inHg

10:00 AM

Sunny

77° 💧 None 💨 2 mph H 62%29.85 inHg

11:00 AM

Sunny

80° 💧 None 💨 3 mph H 53%29.85 inHg

12:00 PM

Sunny

83° 💧 None 💨 4 mph H 48%29.83 inHg

1:00 PM

Sunny

84° 💧 None 💨 5 mph H 47%29.80 inHg

2:00 PM

Sunny

85° 💧 None 💨 6 mph H 48%29.80 inHg

3:00 PM

Sunny

84° 💧 None 💨 7 mph H 49%29.80 inHg

4:00 PM

Sunny

82° 💧 None 💨 7 mph H 51%29.77 inHg

5:00 PM

Sunny

80° 💧 None 💨 6 mph H 54%29.77 inHg

6:00 PM

Sunny

77° 💧 None 💨 7 mph H 60%29.80 inHg

7:00 PM

Sunny

73° 💧 None 💨 6 mph H 68%29.80 inHg

8:00 PM

Clear night

71° 💧 None 💨 4 mph H 74%29.83 inHg

9:00 PM

Clear night

70° 💧 None 💨 3 mph H 79%29.83 inHg

10:00 PM

Clear night

69° 💧 None 💨 3 mph H 82%29.85 inHg

11:00 PM

Clear night

68° 💧 None 💨 2 mph H 85%29.85 inHg

Tuesday

12:00 AM

Clear night

67° 💧 None 💨 2 mph H 89%29.88 inHg

1:00 AM

Clear night

67° 💧 None 💨 1 mph H 91%29.88 inHg

2:00 AM

Clear night

66° 💧 None 💨 1 mph H 93%29.88 inHg

3:00 AM

Clear night

66° 💧 None 💨 2 mph H 93%29.88 inHg

4:00 AM

Clear night

65° 💧 None 💨 1 mph H 94%29.88 inHg

5:00 AM

Clear night

65° 💧 None 💨 1 mph H 95%29.88 inHg

6:00 AM

Clear night

64° 💧 None 💨 2 mph H 95%29.88 inHg

7:00 AM

Mostly sunny

64° 💧 None 💨 2 mph H 94%29.88 inHg

8:00 AM

Sunny

68° 💧 None 💨 2 mph H 83%29.91 inHg

9:00 AM

Sunny

72° 💧 None 💨 4 mph H 69%29.91 inHg

10:00 AM

Sunny

76° 💧 None 💨 4 mph H 58%29.91 inHg

11:00 AM

Sunny

78° 💧 None 💨 4 mph H 52%29.94 inHg

12:00 PM

Sunny

80° 💧 None 💨 4 mph H 49%29.91 inHg

1:00 PM

Sunny

81° 💧 None 💨 5 mph H 48%29.91 inHg

2:00 PM

Sunny

82° 💧 None 💨 6 mph H 50%29.88 inHg

3:00 PM

Sunny

81° 💧 None 💨 7 mph H 52%29.88 inHg

4:00 PM

Sunny

80° 💧 None 💨 7 mph H 53%29.88 inHg

5:00 PM

Sunny

77° 💧 None 💨 7 mph H 55%29.88 inHg

Wednesday

2:00 AM

Clear night

66° 💧 None 💨 3 mph H 87%29.94 inHg

5:00 AM

Clear night

64° 💧 None 💨 1 mph H 94%29.97 inHg

8:00 AM

Sunny

66° 💧 None 💨 1 mph H 86%30.00 inHg

11:00 AM

Sunny

77° 💧 None 💨 4 mph H 49%30.00 inHg

2:00 PM

Sunny

82° 💧 None 💨 7 mph H 40%29.94 inHg

5:00 PM

Sunny

80° 💧 None 💨 7 mph H 46%29.91 inHg

8:00 PM

Clear night

71° 💧 None 💨 5 mph H 68%29.97 inHg

11:00 PM

Clear night

69° 💧 None 💨 2 mph H 77%30.00 inHg

Thursday

2:00 AM

Clear night

67° 💧 None 💨 2 mph H 82%30.00 inHg

5:00 AM

Clear night

65° 💧 None 💨 1 mph H 88%30.00 inHg

8:00 AM

Sunny

67° 💧 None 💨 3 mph H 82%30.06 inHg

11:00 AM

Sunny

77° 💧 None 💨 3 mph H 49%30.06 inHg

2:00 PM

Sunny

84° 💧 None 💨 6 mph H 37%30.00 inHg

5:00 PM

Sunny

79° 💧 None 💨 8 mph H 47%29.97 inHg

8:00 PM

Clear night

71° 💧 None 💨 5 mph H 63%30.00 inHg

11:00 PM

Clear night

68° 💧 None 💨 2 mph H 75%30.03 inHg

Friday

2:00 AM

Clear night

66° 💧 None 💨 1 mph H 84%30.03 inHg

5:00 AM

Clear night

63° 💧 None 💨 1 mph H 90%30.00 inHg

8:00 AM

Sunny

67° 💧 None 💨 0 mph H 79%30.03 inHg

11:00 AM

Sunny

79° 💧 None 💨 3 mph H 46%30.00 inHg

2:00 PM

Sunny

87° 💧 None 💨 5 mph H 28%29.94 inHg

5:00 PM

Sunny

82° 💧 None 💨 7 mph H 40%29.88 inHg

8:00 PM

Clear night

73° 💧 None 💨 4 mph H 55%29.91 inHg

11:00 PM

Clear night

70° 💧 None 💨 3 mph H 70%29.94 inHg

Saturday

5:00 AM

Clear night

69° 💧 None 💨 3 mph H 72%29.94 inHg

11:00 AM

Mostly sunny

63° 💧 None 💨 2 mph H 97%29.88 inHg

5:00 PM

Sunny

78° 💧 None 💨 2 mph H 53%29.91 inHg

11:00 PM

Clear night

83° 💧 None 💨 7 mph H 43%29.77 inHg

Sunday

5:00 AM

Clear night

70° 💧 None 💨 3 mph H 77%29.83 inHg

11:00 AM

Overcast

66° 💧 None 💨 2 mph H 93%29.85 inHg

5:00 PM

Mostly cloudy

76° 💧 None 💨 2 mph H 61%29.88 inHg

11:00 PM

Clear night

81° 💧 None 💨 7 mph H 50%29.80 inHg

Monday

5:00 AM

Clear night

70° 💧 None 💨 3 mph H 78%29.88 inHg

11:00 AM

Partly cloudy

65° 💧 None 💨 1 mph H 96%29.88 inHg

5:00 PM

Mostly sunny

77° 💧 None 💨 2 mph H 59%29.94 inHg

11:00 PM

Overcast night

79° 💧 None 💨 7 mph H 57%29.83 inHg

Tuesday

5:00 AM

Mostly cloudy night

70° 💧 None 💨 3 mph H 78%29.91 inHg

11:00 AM

Overcast

68° 💧 None 💨 1 mph H 84%29.88 inHg

5:00 PM

Sunny

78° 💧 None 💨 3 mph H 58%29.91 inHg

11:00 PM

Partly cloudy night

79° 💧 None 💨 6 mph H 56%29.80 inHg

Wednesday

5:00 AM

Mostly clear night

70° 💧 None 💨 3 mph H 79%29.88 inHg

11:00 AM

Mostly sunny

67° 💧 None 💨 2 mph H 86%29.83 inHg

5:00 PM

Mostly sunny

74° 💧 None 💨 4 mph H 68%29.88 inHg

11:00 PM

Mostly clear night

75° 💧 None 💨 7 mph H 58%29.83 inHg

Thursday

5:00 AM

Overcast night

69° 💧 None 💨 3 mph H 74%29.85 inHg

11:00 AM

Partly cloudy

68° 💧 None 💨 4 mph H 76%29.83 inHg

5:00 PM

Mostly cloudy

71° 💧 None 💨 4 mph H 65%29.88 inHg

11:00 PM

Mostly clear night

74° 💧 None 💨 6 mph H 52%29.83 inHg

Friday

5:00 AM

Mostly clear night

66° 💧 None 💨 2 mph H 75%29.85 inHg

11:00 AM

Mostly sunny

61° 💧 None 💨 3 mph H 90%29.88 inHg

5:00 PM

Sunny

74° 💧 None 💨 3 mph H 52%29.91 inHg

11:00 PM

Clear night

78° 💧 None 💨 8 mph H 48%29.83 inHg

Saturday

5:00 AM

Clear night

68° 💧 None 💨 1 mph H 73%29.88 inHg

11:00 AM

Sunny

62° 💧 None 💨 2 mph H 91%29.88 inHg

5:00 PM

Sunny

80° 💧 None 💨 3 mph H 43%29.91 inHg

11:00 PM

Clear night

83° 💧 None 💨 7 mph H 39%29.83 inHg

Sunday

5:00 AM

Clear night

69° 💧 None 💨 2 mph H 65%29.91 inHg

11:00 AM

Mostly sunny

63° 💧 None 💨 1 mph H 86%29.91 inHg

5:00 PM

Mostly sunny

80° 💧 None 💨 3 mph H 34%29.94 inHg

11:00 PM

Clear night

85° 💧 None 💨 7 mph H 28%29.85 inHg

In Fullerton and, more broadly, across the state of California: This morning will begin with clear skies and mild temperatures around 60 degrees. As the day progresses, temperatures will rise to a comfortable high of about 84 degrees. Winds will be moderate from the northwest, reaching up to 15 mph, with gusts possibly reaching 29 mph. No precipitation is expected throughout the day, providing ideal conditions for outdoor activities. In the afternoon, the weather will remain dry and warm, with the wind staying steady. Overall, it looks like a pleasant day with plenty of sunshine and mild breezes.

15-Day Weather Outlook for Fullerton

TomorrowTomorrow

Partly cloudy 85°/66° 💧 None 💨 7 mph

Tuesday, Sep 15Tue Sep 15

Mostly sunny 82°/64° 💧 None 💨 7 mph

Wednesday, Sep 16Wed Sep 16

Sunny 82°/64° 💧 None 💨 7 mph

Thursday, Sep 17Thu Sep 17

Sunny 84°/65° 💧 None 💨 7 mph

Friday, Sep 18Fri Sep 18

Sunny 87°/63° 💧 None 💨 8 mph

Saturday, Sep 19Sat Sep 19

Mostly sunny 82°/63° 💧 None 💨 7 mph

Sunday, Sep 20Sun Sep 20

Overcast 83°/66° 💧 None 💨 7 mph

Monday, Sep 21Mon Sep 21

Partly cloudy 81°/65° 💧 0.005 in 💨 7 mph

Tuesday, Sep 22Tue Sep 22

Mostly sunny 79°/68° 💧 0.001 in 💨 7 mph

Wednesday, Sep 23Wed Sep 23

Partly cloudy 79°/67° 💧 None 💨 6 mph

Thursday, Sep 24Thu Sep 24

Partly cloudy 75°/68° 💧 0.014 in 💨 7 mph

Friday, Sep 25Fri Sep 25

Mostly cloudy 74°/61° 💧 0.010 in 💨 6 mph

Saturday, Sep 26Sat Sep 26

Sunny 78°/62° 💧 None 💨 8 mph

Sunday, Sep 27Sun Sep 27

Mostly sunny 83°/63° 💧 None 💨 7 mph

Monday, Sep 28Mon Sep 28

Mostly sunny 85°/80° 💧 None 💨 7 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Fullerton

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Fullerton

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 10:00 AM

PM2.5 Fine particles Good 5,2µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 19,9µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Fair 88,3µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 0,6µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is acceptable for most people.

UV & HEALTH

UV, Sun & Health Outlook in Fullerton

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 9,1Very high 🙂Fair

Tomorrow UV 8,8Very high 😐Moderate

Tuesday UV 8,7Very high 🙂Fair

Wednesday UV 8,4Very high 🙂Fair

Thursday UV 6,0High 🙂Fair

Friday UV 6,0High —Unavailable

Saturday UV 6,0High —Unavailable

Hourly UV index today

10:00 AMUV 4,3 11:00 AMUV 6,7 12:00 PMUV 8,5 1:00 PMUV 9,1 2:00 PMUV 8,2 3:00 PMUV 6,1 4:00 PMUV 3,6 5:00 PMUV 1,5 6:00 PMUV 0,4 7:00 PMUV 0,0

Today's weather health advice Open today's recommendations.

Very high UV risk

Use SPF 50+ sunscreen, a hat and sunglasses. Seek shade and limit exposure around midday.

Acceptable air quality

Air quality is acceptable for most people. Very sensitive people may want to reduce prolonged exertion.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

Best in the morning or late in the day

For walking, running or cycling, prefer the early morning or late afternoon.

WIND OUTLOOK

Hourly Wind Forecast for Fullerton

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · FULLERTON, CALIFORNIA

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 11:00 PM–12:00 AM.

100/100Best-hour score

BEST TIME TONIGHT 11:00 PM–12:00 AM Astronomical darkness: 8:25 PM–5:10 AM

☁ Cloud cover 0% Real hourly forecast for the best viewing hour.

☾ Moonlight 6% Waxing Crescent · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 26° high at the best hour.

✦ Estimated visible meteors 1–2/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min52%

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 5–SEP 21

September ε-PerseidsStart SEP 5 · Peak SEP 9 · End SEP 21 · ZHR 8 · 6% Moon at peak

ACTIVE NOW

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

UPCOMING

OCT 2–NOV 7

OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak

UPCOMING

OCT 20–DEC 10

Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak

UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

DISCOVER WEATHER NEARBY Weather in other cities

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Forecast data for Fullerton were last refreshed today at 9:58 AM. The current forecast period extends through 15/09/2026 at 7:00 AM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.