Monthly Climate Summary for December 2010 at Whipsnade (Lodge)

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Exceptionally cold and wintry till the 9th and from 16th-27th;  generally dry but very dull

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Overall mean temperature was

-1.0

ºC

which is

-4.8

degC

compared with the 1971-2000 average

Mean day maximum (09-21) was

1.1

ºC

which is

-5.1

degC

compared with the 1971-2000 average

Mean night minimum (21-09) was

-3.0

ºC

which is

-4.5

degC

compared with the 1971-2000 average

Mean 24hr maximum (09-09) was

1.4

ºC

Mean 24hr minimum (09-09) was

-3.7

ºC

Highest day max was

7.2

ºC

on  the

29

Lowest day max was

-3.4

ºC

on  the

17

Highest night min was

5.4

ºC

on  the

30

Lowest night min was

-13.3

ºC

on  the

20

Lowest grass min was

-19.4

ºC

on  the

20

Total rainfall this month was

39.0

mm

which is

54.9

per  cent

of the 1971-2000 average

Highest daily fall was

10.0

mm

on  the

18

Number of hours with rain was

TSR rainfall duration was

62.7

hrs

which is

per  cent

of the 1971-2000 average

Highest no of wet hrs

hrs

on  the

Highest duration

10.0

hrs

on  the

Mean rainfall intensity

0.62

mm/hr

Total CS sunshine this month was

18.7

hrs

which is

38.6

per  cent

of the 1971-2000 average

Equiv. C/S sunshine total was

hrs

which is

per  cent

of the 1971-2000 average

Highest daily sun was

3.6

hrs

on  the

7

Maximum  snow depth  was

15.0

cm

on  the

Mean sea-level pressure at 09Z

1015.2

mbar

which is

+0.6

mbar

compared with the 1961-1990 average

Highest pressure at 09Z

1037.4

mbar

on  the

15

Lowest  pressure at 09Z

992.4

mbar

on  the

18

Number of days with:

Air Frost

25

0.2mm rain

16

No  sun

19

Snow lying

18

Grnd Frost

25

1.0mm

11

3h  sun

3

Snow/sleet

15

Max < 0ºC

13

5mm

2

6h  sun

0

Hail

1

Max > 10

0

10mm

1

9h  sun

0

Thunder

0

Max > 20

0

25mm

0

12h sun

0

Fog at 09Z

13

Max > 30

0

15h sun

0

Gale

0

Notable events during the month: