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Lala’s stormy close encounter with Hawaii to last into Sunday night. See the latest.

Ontario, CA

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Ontario, CA Weather

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12 PM

83°

RealFeel® 92°

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.

0%

Mostly sunny

RealFeel Shade™81°

Heat Index84°

WindWSW 6 mph

Air QualityFair

Max UV Index9.0 (Very High)

Wind Gusts9 mph

Humidity49%

Indoor Humidity49% (Slightly Humid)

Dew Point62° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover17%

Visibility8 mi

Cloud Ceiling33300 ft

1 PM

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.

0%

Mostly sunny

RealFeel Shade™84°

Heat Index86°

WindWSW 8 mph

Air QualityFair

Max UV Index10.0 (Very High)

Wind Gusts12 mph

Humidity42%

Indoor Humidity42% (Slightly Humid)

Dew Point61° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover25%

Visibility8 mi

Cloud Ceiling30000 ft

2 PM

89°

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.

0%

Mostly sunny

RealFeel Shade™86°

Heat Index88°

WindWSW 9 mph

Air QualityFair

Max UV Index9.0 (Very High)

Wind Gusts14 mph

Humidity36%

Indoor Humidity36% (Slightly Humid)

Dew Point59° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

3 PM

90°

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.

0%

Mostly sunny

RealFeel Shade™87°

Heat Index89°

WindWSW 10 mph

Air QualityFair

Max UV Index6.6 (High)

Wind Gusts16 mph

Humidity34%

Indoor Humidity34% (Slightly Humid)

Dew Point58° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

4 PM

92°

RealFeel® 92°

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.

0%

Mostly sunny

RealFeel Shade™88°

Heat Index90°

WindWSW 12 mph

Air QualityFair

Max UV Index4.4 (Moderate)

Wind Gusts17 mph

Humidity32%

Indoor Humidity32% (Slightly Humid)

Dew Point58° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

5 PM

90°

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.

0%

Mostly sunny

RealFeel Shade™86°

Heat Index88°

WindWSW 12 mph

Air QualityFair

Max UV Index2.8 (Moderate)

Wind Gusts20 mph

Humidity34%

Indoor Humidity34% (Slightly Humid)

Dew Point58° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

6 PM

87°

RealFeel® 86°

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.

0%

Mostly sunny

RealFeel Shade™84°

Heat Index86°

WindWSW 10 mph

Air QualityFair

Max UV Index1.7 (Low)

Wind Gusts17 mph

Humidity36%

Indoor Humidity36% (Slightly Humid)

Dew Point58° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover20%

Visibility10 mi

Cloud Ceiling30000 ft

7 PM

84°

RealFeel® 82°

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.

0%

Mostly sunny

RealFeel Shade™82°

Heat Index83°

WindWSW 9 mph

Air QualityFair

Max UV Index0.6 (Low)

Wind Gusts16 mph

Humidity40%

Indoor Humidity40% (Slightly Humid)

Dew Point58° F

AccuLumen Brightness Index™4 (Dull)

Cloud Cover15%

Visibility10 mi

Cloud Ceiling30000 ft

8 PM

81°

RealFeel® 78°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

0%

Mostly clear

Heat Index81°

WindWSW 9 mph

Air QualityFair

Wind Gusts14 mph

Humidity47%

Indoor Humidity47% (Slightly Humid)

Dew Point59° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover26%

Visibility10 mi

Cloud Ceiling30000 ft

9 PM

78°

RealFeel® 75°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

0%

Mostly clear

WindWSW 7 mph

Air QualityFair

Wind Gusts10 mph

Humidity53%

Indoor Humidity53% (Slightly Humid)

Dew Point59° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover26%

Visibility10 mi

Cloud Ceiling30000 ft

10 PM

74°

RealFeel® 72°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

0%

Mostly clear

WindWSW 7 mph

Air QualityFair

Wind Gusts7 mph

Humidity61%

Indoor Humidity61% (Slightly Humid)

Dew Point60° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover26%

Visibility10 mi

Cloud Ceiling30000 ft

11 PM

71°

RealFeel® 69°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

0%

Mostly clear

WindWSW 6 mph

Air QualityFair

Wind Gusts6 mph

Humidity69%

Indoor Humidity69% (Slightly Humid)

Dew Point61° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover26%

Visibility10 mi

Cloud Ceiling30000 ft

Hourly Weather Forecast for Ontario

AccuWeather's hourly forecast for Ontario provides hour-by-hour temperatures, RealFeel® Temperature, and precipitation probability through the next 10 days. The current hour shows 83° with a RealFeel® of 92°, mostly sunny 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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