Monthly Climate Summary for March 2007 at Hampstead

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Exceptionally sunny; brief wintry spell 18th-22nd

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Overall mean temperature was

8.1

ºC

which is

+1.6

degC

compared with the 1971-2000 average

Mean day maximum (09-21) was

12.1

ºC

Mean night minimum (21-09) was

4.1

ºC

Mean 24hr maximum (09-09) was

12.2

ºC

which is

+2.2

degC

compared with the 1971-2000 average

Mean 24hr minimum (09-09) was

3.9

ºC

which is

+0.9

degC

compared with the 1971-2000 average

Highest day max was

17.6

ºC

on the

12

Lowest day max was

5.9

ºC

on the

20

Highest night min was

8.2

ºC

on the

6

Lowest night min was

-2.0

ºC

on the

22

Lowest grass min was

-5.2

ºC

on the

22

Total rainfall this month was

57.4

mm

which is

112.6

per cent

of the 1971-2000 average

Highest daily fall was

17.8

mm

on the

5

Number of hours with rain was

78.0

hrs

Equiv. TSR rainfall duration was

54.6

hrs

which is

113.8

per cent

of the 1971-2000 average

Highest no of wet hrs

10.0

hrs

on the

2

Highest equiv duration

8.3

hrs

on the

2

Mean rainfall intensity

1.05

mm/h

Total sunshine this month was

159.6

hrs

which is

159.8

per cent

of the 1971-2000 average

Equiv. C/S sunshine total was

175.6

hrs

which is

159.8

per cent

of the 1971-2000 average

Highest daily sun was

10.0

hrs

on the

26

Maximum snow depth was

cm

on the

Mean sea-level pressure at 09Z

1017.2

mbar

which is

+2.4

mbar

compared with the 1961-1990 average

Highest pressure at 09Z

1037.3

mbar

on the

10

Lowest pressure at 09Z

992.6

mbar

on the

1

Number of days with:

Air Frost

2

0.2mm rain

20

No sun

0

Snow lying

0

Grnd Frost

7

1.0mm

10

3h sun

24

Snow/sleet

4

Max < 0ºC

0

5mm

3

6h sun

14

Hail

3

Max > 10

22

10mm

1

9h sun

3

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:

Sunniest March since 2003

Remnants of snow-cover on the mornings of the 19th, 20th and 22nd