Monthly Climate Summary for December 2006 at Hampstead

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Very mild & unsettled first half; cold and foggy before Christmas; mild, wet end

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Overall mean temperature was

6.4

ºC

which is

+1.4

degC

compared with the 1971-2000 average

Mean day maximum (09-21) was

8.6

ºC

Mean night minimum (21-09) was

4.8

ºC

Mean 24hr maximum (09-09) was

8.9

ºC

which is

+1.4

degC

compared with the 1971-2000 average

Mean 24hr minimum (09-09) was

3.9

ºC

which is

+1.4

degC

compared with the 1971-2000 average

Highest day max was

13.5

ºC

on  the

4

Lowest day max was

0.2

ºC

on  the

22

Highest night min was

11.6

ºC

on  the

5

Lowest night min was

-2.9

ºC

on  the

22

Lowest grass min was

-6.5

ºC

on  the

21

Total rainfall this month was

68.2

mm

which is

103.3

per  cent

of the 1971-2000 average

Highest daily fall was

9.5

mm

on  the

6

Number of hours with rain was

100.0

hrs

Equiv. TSR rainfall duration was

70.0

hrs

which is

122.8

per  cent

of the 1971-2000 average

Highest no of wet hrs

11.0

hrs

on  the

1

Highest equiv duration

9.1

hrs

on  the

1

Total sunshine this month was

55.5

hrs

which is

123.4

per  cent

of the 1971-2000 average

Equiv. C/S sunshine total was

61.1

hrs

which is

123.4

per  cent

of the 1971-2000 average

Highest daily sun was

5.9

hrs

on  the

17

Maximum  snow depth  was

0.0

cm

on the

30

Mean sea-level pressure at 09Z

1020.0

mbar

which is

+5.0

mbar

compared with the 1961-1990 average

Highest pressure at 09Z

1043.7

mbar

on  the

22

Lowest  pressure at 09Z

984.2

mbar

on  the

8

Number of days with:

Air Frost

6

0.2mm rain

22

No  sun

11

Snow lying

0

Grnd Frost

10

1.0mm

12

3h  sun

13

Snow/sleet

0

Max < 0ºC

0

5mm

6

6h  sun

1

Hail

0

Max > 10

16

10mm

0

9h  sun

0

Thunder

1

Max > 20

0

25mm

0

12h sun

0

Fog at 09Z

3

Max > 30

0

15h sun

0

Gale

0

Notable events during the month:

Warmest December since 1988