Monthly Climate Summary for  July  2007  at Hampstead

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Generally cool, dull, and wet

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Overall mean temperature was

16.5

ºC

which is

-0.8

degC

compared with the 1971-2000 average

Mean day maximum (09-21) was

20.6

ºC

Mean night minimum (21-09) was

12.4

ºC

Mean 24hr maximum (09-09) was

20.6

ºC

which is

-1.4

degC

compared with the 1971-2000 average

Mean 24hr minimum (09-09) was

12.4

ºC

which is

-0.3

degC

compared with the 1971-2000 average

Highest day max was

23.3

ºC

on  the

19

Lowest day max was

18.1

ºC

on  the

26

Highest night min was

16.8

ºC

on  the

16

Lowest night min was

9.1

ºC

on  the

31

Lowest grass min was

5.2

ºC

on  the

30

Total rainfall this month was

88.7

mm

which is

188.6

per  cent

of the 1971-2000 average

Highest daily fall was

22.4

mm

on  the

20

Number of hours with rain was

67.0

hrs

Equiv. TSR rainfall duration was

46.9

hrs

which is

167.5

per  cent

of the 1971-2000 average

Highest no of wet hrs

9.0

hrs

on  the

2

Highest equiv duration

7.5

hrs

on  the

2

Mean rainfall intensity

1.89

mm/h

Total sunshine this month was

154.6

hrs

which is

88.1

per  cent

of the 1971-2000 average

Equiv. C/S sunshine total was

170.1

hrs

which is

88.1

per  cent

of the 1971-2000 average

Highest daily sun was

9.8

hrs

on  the

31

Maximum  snow depth  was

0.0

cm

on the

Mean sea-level pressure at 09Z

1012.6

mbar

which is

-4.8

mbar

compared with the 1961-1990 average

Highest pressure at 09Z

1022.6

mbar

on  the

31

Lowest  pressure at 09Z

1000.8

mbar

on  the

3

Number of days with:

Air Frost

0

0.2mm rain

18

No  sun

0

Snow lying

0

Grnd Frost

0

1.0mm

12

3h  sun

25

Snow/sleet

0

Max < 0ºC

0

5mm

5

6h  sun

11

Hail

0

Max > 10

31

10mm

3

9h  sun

1

Thunder

2

Max > 20

21

25mm

0

12h sun

0

Fog at 09Z

0

Max > 30

0

15h sun

0

Gale

0

Notable events during the month: