Monthly Climate Summary for February 2009 at Hampstead

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Cold and wintry at first, becoming rather mild and dry after mid-month

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Overall mean temperature was

4.4

ºC

which is

0.0

degC

compared with the 1971-2000 average

Mean day maximum (09-21) was

7.0

ºC

Mean night minimum (21-09) was

1.8

ºC

Mean 24hr maximum (09-09) was

7.0

ºC

which is

-0.2

degC

compared with the 1971-2000 average

Mean 24hr minimum (09-09) was

1.7

ºC

which is

+0.2

degC

compared with the 1971-2000 average

Highest day max was

14.2

ºC

on  the

27

Lowest day max was

-0.1

ºC

on  the

2

Highest night min was

7.7

ºC

on  the

25

Lowest night min was

-3.7

ºC

on  the

2

Lowest grass min was

-6.9

ºC

on  the

7

Total rainfall this month was

44.2

mm

which is

110.6

per  cent

of the 1971-2000 average

Highest daily fall was

18.5

mm

on  the

9

Number of hours with rain was

67.0

hrs

Equiv. TSR rainfall duration was

46.9

hrs

which is

99.8

per  cent

of the 1971-2000 average

Highest no of wet hrs

19.0

hrs

on  the

9

Highest equiv duration

15.8

hrs

on  the

9

Mean rainfall intensity

0.94

mm/h

Total sunshine this month was

67.6

hrs

which is

110.5

per  cent

of the 1971-2000 average

Equiv. C/S sunshine total was

74.4

hrs

which is

110.5

per  cent

of the 1971-2000 average

Highest daily sun was

7.3

hrs

on  the

21

Maximum  snow depth  was

16.0

cm

on the

2

Mean sea-level pressure at 09Z

1016.1

mbar

which is

+0.7

mbar

compared with the 1961-1990 average

Highest pressure at 09Z

1032.7

mbar

on  the

21

Lowest  pressure at 09Z

988.3

mbar

on  the

5

Number of days with:

Air Frost

12

0.2mm rain

16

No  sun

5

Snow lying

7

Grnd Frost

15

1.0mm

8

3h  sun

11

Snow/sleet

7

Max < 0ºC

1

5mm

2

6h  sun

1

Hail

2

Max > 10

7

10mm

1

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: