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A new heat dome is set to expand across the central and eastern US. Click for the forecast.

Smithtown, NY

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Smithtown, NY Weather

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Hourly

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4 PM

83°

RealFeel® 90°

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™83°

Heat Index86°

WindSW 7 mph

Air QualityFair

Max UV Index4.8 (Moderate)

Wind Gusts8 mph

Humidity58%

Indoor Humidity58% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover11%

Visibility10 mi

Cloud Ceiling33400 ft

5 PM

82°

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%

Sunny

RealFeel Shade™82°

Heat Index84°

WindSSW 7 mph

Air QualityFair

Max UV Index3.4 (Moderate)

Wind Gusts8 mph

Humidity58%

Indoor Humidity58% (Humid)

Dew Point66° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover6%

Visibility10 mi

Cloud Ceiling30000 ft

6 PM

80°

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%

Sunny

RealFeel Shade™79°

Heat Index82°

WindSSW 8 mph

Air QualityFair

Max UV Index2.1 (Low)

Wind Gusts9 mph

Humidity61%

Indoor Humidity61% (Humid)

Dew Point66° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover6%

Visibility10 mi

Cloud Ceiling30000 ft

7 PM

78°

RealFeel® 79°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

0%

Sunny

RealFeel Shade™77°

WindSSW 9 mph

Air QualityFair

Max UV Index1.2 (Low)

Wind Gusts10 mph

Humidity65%

Indoor Humidity65% (Humid)

Dew Point66° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover6%

Visibility10 mi

Cloud Ceiling30000 ft

8 PM

76°

RealFeel® 75°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

0%

Sunny

RealFeel Shade™75°

WindSSW 9 mph

Air QualityFair

Max UV Index0.3 (Low)

Wind Gusts14 mph

Humidity69%

Indoor Humidity69% (Humid)

Dew Point66° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover6%

Visibility10 mi

Cloud Ceiling30000 ft

9 PM

74°

RealFeel® 73°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

0%

Clear

WindSSW 9 mph

Air QualityFair

Wind Gusts14 mph

Humidity75%

Indoor Humidity75% (Humid)

Dew Point66° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover6%

Visibility10 mi

Cloud Ceiling30000 ft

10 PM

72°

RealFeel® 71°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

0%

Clear

WindSSW 8 mph

Air QualityFair

Wind Gusts13 mph

Humidity82%

Indoor Humidity82% (Humid)

Dew Point66° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover7%

Visibility10 mi

Cloud Ceiling30000 ft

11 PM

71°

RealFeel® 71°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

0%

Clear

WindSSW 8 mph

Air QualityFair

Wind Gusts13 mph

Humidity84%

Indoor Humidity84% (Humid)

Dew Point66° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover6%

Visibility10 mi

Cloud Ceiling30000 ft

Hourly Weather Forecast for Smithtown

AccuWeather's hourly forecast for Smithtown provides hour-by-hour temperatures, RealFeel® Temperature, and precipitation probability through the next 10 days. The current hour shows 83° with a RealFeel® of 90°, 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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New York, NY
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