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United States / Virginia

in Herndon mainly cloudy, no precipitation, +12 °C

Now Today Tomorrow

3 days

Weekend 7 days 10 days 2 weeks Month

Herndon 3-Day Weather Forecast

Fr, 19 April Sa, 20 April Su, 21 April Mo, 22 April Tu, 23 April We, 24 April Th, 25 April Fr, 26 April Sa, 27 April Su, 28 April

Overnight

Morning

Afternoon

Evening

Overnight

Morning

Afternoon

Evening

Overnight

Morning

Afternoon

Evening

Overnight

Morning

Afternoon

Evening

Overnight

Morning

Afternoon

Evening

Overnight

Morning

Afternoon

Evening

Overnight

Morning

Afternoon

Evening

Overnight

Morning

Afternoon

Evening

Overnight

Morning

Afternoon

Evening

Overnight

Morning

Afternoon

Evening

Air temperature, °C

+12

+12

+18

+16

+13

+15

+23

+18

+7

+7

+15

+15

+5

+9

+19

+14

+7

+14

+23

+18

+12

+16

+20

+9

+2

+7

+15

+11

+4

+10

+17

+13

+8

+13

+21

+15

+10

+16

+22

+18

Real feel, °C

+12

+12

+18

+16

+13

+15

+23

+18

+7

+9

+15

+13

+5

+9

+19

+14

+7

+14

+23

+18

+12

+16

+20

+10

+2

+5

+15

+11

+3

+9

+17

+13

+7

+12

+21

+15

+10

+16

+22

+18

Average wind speed, m/s

4

4

4

3

1

4

7

6

4

2

4

2

2

3

3

1

1

4

5

3

2

5

7

4

1

3

5

3

2

4

5

1

1

2

4

3

2

4

6

3

Wind gusts, m/s

9

9

10

9

3

11

13

14

10

6

8

8

5

6

6

3

2

10

12

8

4

11

15

11

5

7

9

9

6

5

6

4

5

3

5

6

5

7

8

9

Wind direction

E

SE

SE

SE

N

N

NW

NW

N

N

NW

N

NW

N

NW

SE

S

S

S

S

W

NW

NW

N

NE

E

S

SW

N

NW

NW

NE

NE

NE

N

E

S

S

S

S

Birch pollen, points

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

Grass pollen, points

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

Ragweed pollen, points

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

Precipitation in liquid equivalent, mm

0

0

0.2

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0.1

0

0

0

0

2.3

4.2

1.8

0

0

0

0

0

0

0

0

0

0.3

Falling snow, cm

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

Snow depth, cm

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

—

—

—

—

—

—

—

—

—

—

Pressure, mmHg

756

755

753

751

752

752

750

753

755

755

753

751

753

756

755

755

755

756

750

750

751

753

755

758

761

761

756

756

756

754

753

752

753

755

753

753

755

756

755

753

Relative humidity, %

74

72

59

66

81

62

28

25

40

42

33

39

55

51

27

39

58

45

27

37

56

54

33

37

54

46

28

40

54

40

24

34

53

45

31

40

63

52

39

51

UV Index, points

0

2

3

1

0

5

10

1

0

3

4

1

0

3

10

1

0

3

8

1

0

3

6

1

0

3

12

0

0

4

6

2

0

4

6

3

0

4

5

1

Geomagnetic activity, Kp-index

2

3

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

3

3

3

3

3

3

3

3

3

2

2

2

3

3

Washington Dulles

Fairfax Station

Montgomery Village

Montgomery County

Weather in Herndon for 3 days is provided for personal non-commercial use only.

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