Monthly Climate Summary for January 2008 at Hampstead

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Another unsettled, wet, and very mild January;  very nearly frost-free

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Overall mean temperature was

6.7

ºC

which is

+2.5

degC

compared with the 1971-2000 average

Mean day maximum (09-21) was

9.2

ºC

Mean night minimum (21-09) was

4.8

ºC

Mean 24hr maximum (09-09) was

9.4

ºC

which is

+2.8

degC

compared with the 1971-2000 average

Mean 24hr minimum (09-09) was

3.9

ºC

which is

+2.2

degC

compared with the 1971-2000 average

Highest day max was

13.3

ºC

on  the

20

Lowest day max was

2.2

ºC

on  the

3

Highest night min was

11.7

ºC

on  the

19

Lowest night min was

-0.3

ºC

on  the

3

Lowest grass min was

-3.2

ºC

on  the

17

Total rainfall this month was

82.7

mm

which is

131.3

per  cent

of the 1971-2000 average

Highest daily fall was

11.4

mm

on  the

11

Number of hours with rain was

105.0

hrs

Equiv. TSR rainfall duration was

73.5

hrs

which is

118.6

per  cent

of the 1971-2000 average

Highest no of wet hrs

11.0

hrs

on  the

11

Highest equiv duration

9.1

hrs

on  the

11

Mean rainfall intensity

1.13

mm/h

Total sunshine this month was

70.4

hrs

which is

166.4

per  cent

of the 1971-2000 average

Equiv. C/S sunshine total was

77.4

hrs

which is

166.4

per  cent

of the 1971-2000 average

Highest daily sun was

7.1

hrs

on  the

27

Maximum  snow depth  was

0.0

cm

on the

Mean sea-level pressure at 09Z

1013.4

mbar

which is

-1.5

mbar

compared with the 1961-1990 average

Highest pressure at 09Z

1036.4

mbar

on  the

25

Lowest  pressure at 09Z

985.0

mbar

on  the

15

Number of days with:

Air Frost

1

0.2mm rain

23

No  sun

6

Snow lying

0

Grnd Frost

9

1.0mm

14

3h  sun

11

Snow/sleet

1

Max < 0ºC

0

5mm

7

6h  sun

3

Hail

0

Max > 10

13

10mm

2

9h  sun

0

Thunder

0

Max > 20

0

25mm

0

12h sun

0

Fog at 09Z

0

Max > 30

0

15h sun

0

Gale

0

Notable events during the month: