Monthly Climate Summary for November 2010 at Hampstead

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Coldest since 1993 in spite of a very mild start; exceptionally cold last week

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Overall mean temperature was

5.6

ºC

which is

-1.4

degC

compared with the 1971-2000 average

Mean day maximum (09-21) was

7.8

ºC

Mean night minimum (21-09) was

3.8

ºC

Mean 24hr maximum (09-09) was

7.9

ºC

which is

-1.9

degC

compared with the 1971-2000 average

Mean 24hr minimum (09-09) was

3.4

ºC

which is

-0.9

degC

compared with the 1971-2000 average

Highest day max was

17.5

ºC

on  the

4

Lowest day max was

-0.1

ºC

on  the

30

Highest night min was

14.2

ºC

on  the

4

Lowest night min was

-5.8

ºC

on  the

28

Lowest grass min was

-8.8

ºC

on  the

28

Total rainfall this month was

39.4

mm

which is

61.6

per  cent

of the 1971-2000 average

Highest daily fall was

8.1

mm

on  the

5

Number of hours with rain was

76.0

hrs

Equiv. TSR rainfall duration was

53.2

hrs

which is

91.7

per  cent

of the 1971-2000 average

Highest no of wet hrs

11.0

hrs

on  the

17

Highest equiv duration

9.1

hrs

on  the

17

Mean rainfall intensity

0.74

mm/h

Total sunshine this month was

57.9

hrs

which is

91.9

per  cent

of the 1971-2000 average

Equiv. C/S sunshine total was

63.7

hrs

which is

91.9

per  cent

of the 1971-2000 average

Highest daily sun was

6.7

hrs

on  the

26

Maximum  snow depth  was

2.0

cm

on the

30

Mean sea-level pressure at 09Z

1007.0

mbar

which is

-7.5

mbar

compared with the 1961-1990 average

Highest pressure at 09Z

1022.8

mbar

on  the

16

Lowest  pressure at 09Z

973.6

mbar

on  the

8

Number of days with:

Air Frost

7

0.2mm rain

16

No  sun

5

Snow lying

1

Grnd Frost

14

1.0mm

12

3h  sun

9

Snow/sleet

3

Max < 0ºC

1

5mm

1

6h  sun

3

Hail

0

Max > 10

9

10mm

0

9h  sun

0

Thunder

0

Max > 20

0

25mm

0

12h sun

0

Fog at 09Z

1

Max > 30

0

15h sun

0

Gale

0

Notable events during the month: