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Fullerton, CA

69°F
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Fullerton

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69°
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Fullerton, CA Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

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Hourly

 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

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6 AM

68°
RealFeel® 69°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 0%
Chevron down
Mostly clear

WindSW 2 mph

Air QualityPoor

Wind Gusts4 mph

Humidity90%

Indoor Humidity90% (Humid)

Dew Point65° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover10%

Visibility10 mi

Cloud Ceiling30000 ft

7 AM

70°
RealFeel® 72°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 0%
Chevron down
Mostly sunny

RealFeel Shade™72°

WindWSW 2 mph

Air QualityPoor

Max UV Index0.5 (Low)

Wind Gusts4 mph

Humidity84%

Indoor Humidity84% (Humid)

Dew Point65° F

AccuLumen Brightness Index™3 (Dull)

Cloud Cover10%

Visibility10 mi

Cloud Ceiling30000 ft

8 AM

74°
RealFeel® 78°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 0%
Chevron down
Partly sunny

RealFeel Shade™75°

WindWSW 2 mph

Air QualityPoor

Max UV Index1.6 (Low)

Wind Gusts4 mph

Humidity76%

Indoor Humidity76% (Humid)

Dew Point66° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover37%

Visibility10 mi

Cloud Ceiling30000 ft

9 AM

78°
RealFeel® 84°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 0%
Chevron down
Mostly sunny

RealFeel Shade™79°

WindWSW 4 mph

Air QualityPoor

Max UV Index2.6 (Moderate)

Wind Gusts5 mph

Humidity67%

Indoor Humidity67% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover29%

Visibility10 mi

Cloud Ceiling30000 ft

10 AM

83°
RealFeel® 89°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 0%
Chevron down
Mostly sunny
alerts

Heat Advisory

10:00 AM Saturday - 8:00 PM Monday

RealFeel Shade™83°

Heat Index85°

WindWSW 5 mph

Air QualityPoor

Max UV Index4.2 (Moderate)

Wind Gusts6 mph

Humidity57%

Indoor Humidity57% (Humid)

Dew Point66° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover14%

Visibility10 mi

Cloud Ceiling30000 ft

11 AM

86°
RealFeel® 94°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 0%
Chevron down
Sunny
alerts

Heat Advisory

10:00 AM Saturday - 8:00 PM Monday

RealFeel Shade™86°

Heat Index88°

WindWSW 6 mph

Air QualityPoor

Max UV Index6.1 (High)

Wind Gusts7 mph

Humidity50%

Indoor Humidity50% (Humid)

Dew Point66° F

AccuLumen Brightness Index™10 (Very Bright)

Cloud Cover0%

Visibility10 mi

Cloud Ceiling30000 ft

12 PM

89°
RealFeel® 98°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 0%
Chevron down
Sunny
alerts

Heat Advisory

10:00 AM Saturday - 8:00 PM Monday

RealFeel Shade™88°

Heat Index91°

WindWSW 7 mph

Air QualityPoor

Max UV Index8.4 (Very High)

Wind Gusts8 mph

Humidity45%

Indoor Humidity45% (Humid)

Dew Point65° F

AccuLumen Brightness Index™10 (Very Bright)

Cloud Cover0%

Visibility10 mi

Cloud Ceiling30000 ft

1 PM

91°
RealFeel® 99°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 0%
Chevron down
Sunny
alerts

Heat Advisory

10:00 AM Saturday - 8:00 PM Monday

RealFeel Shade™90°

Heat Index93°

WindWSW 7 mph

Air QualityPoor

Max UV Index9.4 (Very High)

Wind Gusts12 mph

Humidity41%

Indoor Humidity41% (Humid)

Dew Point65° F

AccuLumen Brightness Index™10 (Very Bright)

Cloud Cover0%

Visibility10 mi

Cloud Ceiling30000 ft

2 PM

93°
RealFeel® 99°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 0%
Chevron down
Sunny
alerts

Heat Advisory

10:00 AM Saturday - 8:00 PM Monday

RealFeel Shade™91°

Heat Index95°

WindWSW 8 mph

Air QualityFair

Max UV Index8.4 (Very High)

Wind Gusts15 mph

Humidity39%

Indoor Humidity39% (Humid)

Dew Point64° F

AccuLumen Brightness Index™10 (Very Bright)

Cloud Cover0%

Visibility10 mi

Cloud Ceiling30000 ft

3 PM

93°
RealFeel® 98°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 0%
Chevron down
Sunny
alerts

Heat Advisory

10:00 AM Saturday - 8:00 PM Monday

RealFeel Shade™92°

Heat Index95°

WindWSW 9 mph

Air QualityPoor

Max UV Index6.1 (High)

Wind Gusts14 mph

Humidity37%

Indoor Humidity37% (Humid)

Dew Point64° F

AccuLumen Brightness Index™10 (Very Bright)

Cloud Cover1%

Visibility10 mi

Cloud Ceiling30000 ft

4 PM

94°
RealFeel® 96°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 0%
Chevron down
Sunny
alerts

Heat Advisory

10:00 AM Saturday - 8:00 PM Monday

RealFeel Shade™92°

Heat Index95°

WindWSW 9 mph

Air QualityPoor

Max UV Index4.2 (Moderate)

Wind Gusts14 mph

Humidity35%

Indoor Humidity35% (Humid)

Dew Point63° F

AccuLumen Brightness Index™10 (Very Bright)

Cloud Cover1%

Visibility10 mi

Cloud Ceiling30000 ft

5 PM

92°
RealFeel® 93°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 0%
Chevron down
Sunny
alerts

Heat Advisory

10:00 AM Saturday - 8:00 PM Monday

RealFeel Shade™90°

Heat Index93°

WindWSW 8 mph

Air QualityPoor

Max UV Index2.6 (Moderate)

Wind Gusts13 mph

Humidity36%

Indoor Humidity36% (Slightly Humid)

Dew Point62° F

AccuLumen Brightness Index™10 (Very Bright)

Cloud Cover0%

Visibility10 mi

Cloud Ceiling30000 ft

6 PM

91°
RealFeel® 91°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 0%
Chevron down
Sunny
alerts

Heat Advisory

10:00 AM Saturday - 8:00 PM Monday

RealFeel Shade™89°

Heat Index91°

WindWSW 8 mph

Air QualityFair

Max UV Index1.6 (Low)

Wind Gusts12 mph

Humidity38%

Indoor Humidity38% (Slightly Humid)

Dew Point62° F

AccuLumen Brightness Index™10 (Very Bright)

Cloud Cover0%

Visibility10 mi

Cloud Ceiling30000 ft

7 PM

88°
RealFeel® 87°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 0%
Chevron down
Sunny
alerts

Heat Advisory

10:00 AM Saturday - 8:00 PM Monday

RealFeel Shade™87°

Heat Index88°

WindWSW 7 mph

Air QualityFair

Max UV Index0.5 (Low)

Wind Gusts9 mph

Humidity42%

Indoor Humidity42% (Slightly Humid)

Dew Point62° F

AccuLumen Brightness Index™3 (Dull)

Cloud Cover0%

Visibility10 mi

Cloud Ceiling30000 ft

8 PM

85°
RealFeel® 83°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 0%
Chevron down
Clear
alerts

Heat Advisory

10:00 AM Saturday - 8:00 PM Monday

Heat Index86°

WindWSW 6 mph

Air QualityFair

Wind Gusts7 mph

Humidity48%

Indoor Humidity48% (Humid)

Dew Point63° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover0%

Visibility10 mi

Cloud Ceiling30000 ft

9 PM

82°
RealFeel® 81°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 0%
Chevron down
Clear
alerts

Heat Advisory

10:00 AM Saturday - 8:00 PM Monday

Heat Index83°

WindSW 6 mph

Air QualityFair

Wind Gusts6 mph

Humidity55%

Indoor Humidity55% (Humid)

Dew Point64° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover0%

Visibility10 mi

Cloud Ceiling30000 ft

10 PM

79°
RealFeel® 78°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 0%
Chevron down
Clear
alerts

Heat Advisory

10:00 AM Saturday - 8:00 PM Monday

WindSW 5 mph

Air QualityFair

Wind Gusts6 mph

Humidity61%

Indoor Humidity61% (Humid)

Dew Point64° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover0%

Visibility10 mi

Cloud Ceiling30000 ft

11 PM

76°
RealFeel® 76°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 0%
Chevron down
Clear
alerts

Heat Advisory

10:00 AM Saturday - 8:00 PM Monday

WindSSW 5 mph

Air QualityPoor

Wind Gusts6 mph

Humidity67%

Indoor Humidity67% (Humid)

Dew Point65° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover0%

Visibility10 mi

Cloud Ceiling30000 ft

Hourly Weather Forecast for Fullerton

AccuWeather's hourly forecast for Fullerton provides hour-by-hour temperatures, RealFeel® Temperature, and precipitation probability through the next 10 days. The current hour shows 68° with a RealFeel® of 69°, mostly clear with a 0% chance of precipitation. Each hourly forecast includes wind speed, humidity, air quality, UV index, and the AccuLumen Brightness Index™, AccuWeather's measure of perceived outdoor light intensity. Forecasts are generated by proprietary systems developed by AccuWeather meteorologists since 1962.

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