Monthly Climate Summary for  July  2008  at Hampstead

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Very wet till the 11th;  cool until the 21st;  fair and warm last ten days

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Overall mean temperature was

17.4

ºC

which is

0.0

degC

compared with the 1971-2000 average

Mean day maximum (09-21) was

21.6

ºC

Mean night minimum (21-09) was

13.2

ºC

Mean 24hr maximum (09-09) was

21.6

ºC

which is

-0.4

degC

compared with the 1971-2000 average

Mean 24hr minimum (09-09) was

13.2

ºC

which is

+0.5

degC

compared with the 1971-2000 average

Highest day max was

28.3

ºC

on  the

28

Lowest day max was

16.2

ºC

on  the

9

Highest night min was

18.0

ºC

on  the

23

Lowest night min was

8.9

ºC

on  the

13

Lowest grass min was

4.4

ºC

on  the

4

Total rainfall this month was

53.7

mm

which is

114.2

per  cent

of the 1971-2000 average

Highest daily fall was

21.1

mm

on  the

9

Number of hours with rain was

48.0

hrs

Equiv. TSR rainfall duration was

33.6

hrs

which is

120.0

per  cent

of the 1971-2000 average

Highest no of wet hrs

15.0

hrs

on  the

9

Highest equiv duration

12.5

hrs

on  the

9

Mean Rainfall Intensity

1.60

mm/h

Total sunshine this month was

166.3

hrs

which is

94.8

per  cent

of the 1971-2000 average

Equiv. C/S sunshine total was

183.0

hrs

which is

94.8

per  cent

of the 1971-2000 average

Highest daily sun was

11.7

hrs

on  the

1

Maximum  snow depth  was

0.0

cm

Mean sea-level pressure at 09Z

1015.0

mbar

which is

-2.4

mbar

compared with the 1961-1990 average

Highest pressure at 09Z

1027.2

mbar

on  the

22

Lowest  pressure at 09Z

996.6

mbar

on  the

7

Number of days with:

Air Frost

0

>0.2mm rain

11

No  sun

1

Snow lying

0

Grnd Frost

0

>1.0mm

6

3h  sun

24

Snow/sleet

0

Max < 0ºC

0

>   5mm

4

6h  sun

12

Hail

0

Max > 10

31

> 10mm

2

9h  sun

5

Thunder

4

Max > 20

20

> 25mm

0

12h sun

0

Fog at 09Z

0

Max > 30

0

15h sun

0

Gale

0

Notable events during the month: