Monthly Climate Summary for October 2009 at Hampstead

home

daily

A mostly dry but dull month; often rather cold till the 21st then warm

back

forward

Overall mean temperature was

12.1

ºC

which is

+0.9

degC

compared with the 1971-2000 average

Mean day maximum (09-21) was

15.3

ºC

Mean night minimum (21-09) was

8.9

ºC

Mean 24hr maximum (09-09) was

15.4

ºC

which is

+1.2

degC

compared with the 1971-2000 average

Mean 24hr minimum (09-09) was

8.8

ºC

which is

+0.7

degC

compared with the 1971-2000 average

Highest day max was

18.0

ºC

on  the

27

Lowest day max was

11.4

ºC

on  the

19

Highest night min was

12.7

ºC

on  the

24

Lowest night min was

3.5

ºC

on  the

18

Lowest grass min was

-2.1

ºC

on  the

18

Total rainfall this month was

37.0

mm

which is

53.6

per  cent

of the 1971-2000 average

Highest daily fall was

8.6

mm

on  the

7

Number of hours with rain was

46.0

hrs

Equiv. TSR rainfall duration was

32.2

hrs

which is

74.9

per  cent

of the 1971-2000 average

Highest no of wet hrs

7.0

hrs

on  the

5

Highest equiv duration

5.8

hrs

on  the

5

Mean rainfall intensity

1.15

mm/h

Total sunshine this month was

73.6

hrs

which is

73.7

per  cent

of the 1971-2000 average

Equiv. C/S sunshine total was

81.0

hrs

which is

73.7

per  cent

of the 1971-2000 average

Highest daily sun was

7.2

hrs

on  the

8

Maximum  snow depth  was

0.0

cm

on the

Mean sea-level pressure at 09Z

1017.6

mbar

which is

+1.9

mbar

compared with the 1961-1990 average

Highest pressure at 09Z

1034.1

mbar

on  the

15

Lowest  pressure at 09Z

997.9

mbar

on  the

21

Number of days with:

Air Frost

0

0.2mm rain

16

No  sun

3

Snow lying

0

Grnd Frost

2

1.0mm

9

3h  sun

12

Snow/sleet

0

Max < 0ºC

0

5mm

3

6h  sun

4

Hail

0

Max > 10

31

10mm

0

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: