Monthly Climate Summary for  March  2009 at Hampstead

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Dry and sunny with warm days and cool nights

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Overall mean temperature was

7.7

ºC

which is

+1.2

degC

compared with the 1971-2000 average

Mean day maximum (09-21) was

12.0

ºC

Mean night minimum (21-09) was

3.6

ºC

Mean 24hr maximum (09-09) was

12.0

ºC

which is

+2.0

degC

compared with the 1971-2000 average

Mean 24hr minimum (09-09) was

3.4

ºC

which is

+0.4

degC

compared with the 1971-2000 average

Highest day max was

15.4

ºC

on  the

16

Lowest day max was

7.5

ºC

on  the

4

Highest night min was

8.8

ºC

on  the

12

Lowest night min was

-1.5

ºC

on  the

6

Lowest grass min was

-6.1

ºC

on  the

6

Total rainfall this month was

24.0

mm

which is

47.0

per  cent

of the 1971-2000 average

Highest daily fall was

10.3

mm

on  the

3

Number of hours with rain was

39.0

hrs

Equiv. TSR rainfall duration was

27.3

hrs

which is

56.9

per  cent

of the 1971-2000 average

Highest no of wet hrs

10.0

hrs

on  the

3

Highest equiv duration

8.3

hrs

on  the

3

Mean rainfall intensity

0.88

mm/h

Total sunshine this month was

157.5

hrs

which is

157.7

per  cent

of the 1971-2000 average

Equiv. C/S sunshine total was

173.3

hrs

which is

157.7

per  cent

of the 1971-2000 average

Highest daily sun was

9.3

hrs

on  the

18

Maximum  snow depth  was

1.0

cm

on the

23

Mean sea-level pressure at 09Z

1016.0

mbar

which is

+1.2

mbar

compared with the 1961-1990 average

Highest pressure at 09Z

1035.9

mbar

on  the

17

Lowest  pressure at 09Z

983.3

mbar

on  the

4

Number of days with:

Air Frost

2

0.2mm rain

13

No  sun

0

Snow lying

0

Grnd Frost

12

1.0mm

6

3h  sun

23

Snow/sleet

0

Max < 0ºC

0

5mm

1

6h  sun

12

Hail

1

Max > 10

28

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: