Monthly Climate Summary for November 2009 at Hampstead

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Exceptionally wet but very mild

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Overall mean temperature was

9.1

ºC

which is

+2.1

degC

compared with the 1971-2000 average

Mean day maximum (09-21) was

11.4

ºC

Mean night minimum (21-09) was

6.9

ºC

Mean 24hr maximum (09-09) was

11.5

ºC

which is

+1.7

degC

compared with the 1971-2000 average

Mean 24hr minimum (09-09) was

6.8

ºC

which is

+2.5

degC

compared with the 1971-2000 average

Highest day max was

15.7

ºC

on  the

1

Lowest day max was

5.7

ºC

on  the

30

Highest night min was

11.9

ºC

on  the

19

Lowest night min was

2.2

ºC

on  the

10

Lowest grass min was

-1.5

ºC

on  the

10

Total rainfall this month was

158.3

mm

which is

247.3

per  cent

of the 1971-2000 average

Highest daily fall was

29.5

mm

on  the

29

Number of hours with rain was

147.0

hrs

Equiv. TSR rainfall duration was

102.9

hrs

which is

177.4

per  cent

of the 1971-2000 average

Highest no of wet hrs

20.0

hrs

on  the

30

Highest equiv duration

16.6

hrs

on  the

30

Mean rainfall intensity

1.54

mm/h

Total sunshine this month was

67.7

hrs

which is

107.4

per  cent

of the 1971-2000 average

Equiv. C/S sunshine total was

74.5

hrs

which is

107.4

per  cent

of the 1971-2000 average

Highest daily sun was

6.5

hrs

on  the

7

Maximum  snow depth  was

0.0

cm

on the

Mean sea-level pressure at 09Z

1002.3

mbar

which is

-12.2

mbar

compared with the 1961-1990 average

Highest pressure at 09Z

1020.4

mbar

on  the

9

Lowest  pressure at 09Z

986.7

mbar

on  the

29

Number of days with:

Air Frost

0

0.2mm rain

25

No  sun

2

Snow lying

0

Grnd Frost

2

1.0mm

20

3h  sun

12

Snow/sleet

0

Max < 0ºC

0

5mm

11

6h  sun

1

Hail

0

Max > 10

22

10mm

6

9h  sun

0

Thunder

1

Max > 20

0

25mm

1

12h sun

0

Fog at 09Z

2

Max > 30

0

15h sun

0

Gale

0

Notable events during the month: