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Herndon Junction, VA

71°F
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Herndon Junction

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71°
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Herndon Junction, VA Weather
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Winter Center
Today Hourly

Daily

 Radar MinuteCast Monthly Air Quality Health & Activities
Heat Advisory

July 17 - August 30

Thu 7/17

96° /74°
55%
Partly sunny, hot and humid; an afternoon thunderstorm; danger of dehydration and heatstroke if outside for extended periods of time
alerts

Heat Advisory

11:00 AM Thursday - 8:00 PM Thursday

RealFeel®106°

RealFeel Shade™100°

Max UV Index11 (Extreme)

WindSW 10 mph

Fri 7/18

88° /72°
55%
Partly sunny and humid; watch for a strong afternoon thunderstorm; thunderstorms can bring flash flooding and localized damaging wind gusts

RealFeel®100°

RealFeel Shade™91°

Max UV Index11 (Extreme)

WindW 7 mph

Sat 7/19

87° /74°
66%
Humid with considerable cloudiness; a couple of thunderstorms in the afternoon

RealFeel®101°

RealFeel Shade™92°

Max UV Index9 (Very High)

WindSSE 4 mph

Sun 7/20

91° /70°
77%
Mostly cloudy, hot and humid; a couple of afternoon showers and a thunderstorm; possible danger of dehydration and heatstroke while doing strenuous activities

RealFeel®99°

RealFeel Shade™96°

Max UV Index5 (Moderate)

WindW 7 mph

Mon 7/21

82° /66°
2%
Mostly sunny, pleasant and less humid

RealFeel®92°

RealFeel Shade™82°

Max UV Index10 (Very High)

WindN 7 mph

Tue 7/22

83° /67°
2%
Times of clouds and sun

RealFeel®87°

RealFeel Shade™82°

Max UV Index7 (High)

WindE 5 mph

Wed 7/23

88° /72°
9%
Mostly sunny

RealFeel®92°

RealFeel Shade™86°

Max UV Index10 (Very High)

WindS 7 mph

Thu 7/24

94° /74°
5%
Mostly cloudy, hot and humid

RealFeel®109°

RealFeel Shade™108°

Max UV Index10 (Very High)

WindSSW 5 mph

Fri 7/25

95° /73°
2%
Hot with plenty of sunshine

RealFeel®104°

RealFeel Shade™95°

Max UV Index10 (Very High)

WindSW 4 mph

Sat 7/26

91° /71°
5%
Clouds limiting sunshine

RealFeel®92°

RealFeel Shade™92°

Max UV Index7 (High)

WindWNW 8 mph

Sun 7/27

89° /69°
1%
Partly sunny and humid

RealFeel®102°

RealFeel Shade™98°

Max UV Index10 (Very High)

WindNW 8 mph

Mon 7/28

87° /67°
1%
Partly sunny and humid

RealFeel®100°

RealFeel Shade™93°

Max UV Index10 (Very High)

WindNNW 5 mph

Tue 7/29

89° /66°
25%
Uncomfortably humid with partial sunshine

RealFeel®99°

RealFeel Shade™97°

Max UV Index7 (High)

WindW 7 mph

Wed 7/30

86° /71°
25%
Sun followed by clouds and humid

RealFeel®98°

RealFeel Shade™89°

Max UV Index10 (Very High)

WindWSW 7 mph

Thu 7/31

88° /70°
64%
Humid with considerable cloudiness; a couple of showers and a thunderstorm in the afternoon

RealFeel®94°

RealFeel Shade™93°

Max UV Index3 (Moderate)

WindNW 6 mph

Fri 8/1

87° /70°
25%
Partly sunny and uncomfortably humid

RealFeel®102°

RealFeel Shade™93°

Max UV Index10 (Very High)

WindE 4 mph

Sat 8/2

89° /69°
10%
Mostly sunny and humid

RealFeel®100°

RealFeel Shade™94°

Max UV Index10 (Very High)

WindW 5 mph

Sun 8/3

89° /66°
25%
Cloudy and less humid

RealFeel®87°

RealFeel Shade™87°

Max UV Index3 (Moderate)

WindNNE 8 mph

Mon 8/4

82° /64°
78%
Mostly cloudy and not as warm with rain tapering off

RealFeel®80°

RealFeel Shade™79°

Max UV Index2 (Low)

WindNNE 8 mph

Tue 8/5

81° /63°
20%
Sunshine and a few clouds

RealFeel®85°

RealFeel Shade™78°

Max UV Index9 (Very High)

WindNNE 7 mph

Wed 8/6

82° /63°
20%
Mostly sunny

RealFeel®87°

RealFeel Shade™79°

Max UV Index9 (Very High)

WindNNW 5 mph

Thu 8/7

82° /64°
20%
Mostly sunny

RealFeel®90°

RealFeel Shade™80°

Max UV Index9 (Very High)

WindSSW 4 mph

Fri 8/8

83° /68°
25%
Periods of clouds and sunshine

RealFeel®81°

RealFeel Shade™81°

Max UV Index4 (Moderate)

WindS 10 mph

Sat 8/9

85° /69°
61%
A couple of showers and a thunderstorm in the morning; otherwise, humid with considerable cloudiness

RealFeel®90°

RealFeel Shade™88°

Max UV Index3 (Moderate)

WindW 6 mph

Sun 8/10

83° /68°
25%
Sun and some clouds

RealFeel®89°

RealFeel Shade™83°

Max UV Index5 (Moderate)

WindWNW 5 mph

Mon 8/11

83° /68°
25%
Considerable cloudiness

RealFeel®85°

RealFeel Shade™85°

Max UV Index3 (Moderate)

WindNNE 5 mph

Tue 8/12

82° /67°
20%
Clouds yielding to sun

RealFeel®93°

RealFeel Shade™83°

Max UV Index9 (Very High)

WindNNW 4 mph

Wed 8/13

83° /68°
10%
Sunshine

RealFeel®95°

RealFeel Shade™85°

Max UV Index9 (Very High)

WindSSW 2 mph

Thu 8/14

85° /69°
10%
Humid with sunshine

RealFeel®97°

RealFeel Shade™90°

Max UV Index9 (Very High)

WindS 5 mph

Fri 8/15

87° /69°
20%
Partly sunny and humid

RealFeel®99°

RealFeel Shade™91°

Max UV Index9 (Very High)

WindSW 6 mph

Sat 8/16

86° /68°
25%
Mostly cloudy and humid

RealFeel®93°

RealFeel Shade™93°

Max UV Index3 (Moderate)

WindW 4 mph

Sun 8/17

86° /68°
20%
Sunny and less humid

RealFeel®91°

RealFeel Shade™85°

Max UV Index9 (Very High)

WindNNW 7 mph

Mon 8/18

84° /66°
10%
Mostly sunny

RealFeel®90°

RealFeel Shade™83°

Max UV Index8 (Very High)

WindENE 4 mph

Tue 8/19

83° /68°
25%
Intervals of clouds and sunshine

RealFeel®87°

RealFeel Shade™85°

Max UV Index4 (Moderate)

WindSE 4 mph

Wed 8/20

85° /68°
10%
Sunshine

RealFeel®93°

RealFeel Shade™85°

Max UV Index8 (Very High)

WindSE 2 mph

Thu 8/21

86° /67°
25%
Clouds giving way to a brightening sky

RealFeel®93°

RealFeel Shade™86°

Max UV Index8 (Very High)

WindSE 2 mph

Fri 8/22

88° /68°
10%
Sunny

RealFeel®94°

RealFeel Shade™89°

Max UV Index8 (Very High)

WindWNW 4 mph

Sat 8/23

88° /68°
10%
Mostly sunny and humid

RealFeel®97°

RealFeel Shade™91°

Max UV Index8 (Very High)

WindNW 2 mph

Sun 8/24

87° /69°
25%
Cloudy

RealFeel®88°

RealFeel Shade™88°

Max UV Index2 (Low)

WindSW 5 mph

Mon 8/25

89° /69°
5%
Sunshine and very warm

RealFeel®96°

RealFeel Shade™88°

Max UV Index8 (Very High)

WindW 6 mph

Tue 8/26

89° /68°
25%
Very warm and humid with clouds and sun

RealFeel®93°

RealFeel Shade™90°

Max UV Index4 (Moderate)

WindN 7 mph

Wed 8/27

87° /67°
25%
Less humid with times of sun and clouds

RealFeel®87°

RealFeel Shade™86°

Max UV Index4 (Moderate)

WindNE 7 mph

Thu 8/28

85° /66°
25%
Mostly cloudy

RealFeel®89°

RealFeel Shade™87°

Max UV Index5 (Moderate)

WindENE 2 mph

Fri 8/29

82° /60°
2%
Partly sunny

RealFeel®84°

RealFeel Shade™80°

Max UV Index7 (High)

WindN 6 mph

Sat 8/30

80° /63°
25%
Intervals of clouds and sunshine

RealFeel®84°

RealFeel Shade™79°

Max UV Index4 (Moderate)

WindE 4 mph

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World North America United States Virginia Herndon Junction

Weather Near Herndon Junction:

  • Alexandria, VA
  • Germantown, MD
  • Washington, DC
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