Monthly Climate Summary for January 2009  at Whipsnade (The Lodge)

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Very cold with light snowfalls till the 10th, then unsettled with variable temperatures. Quite sunny

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Overall mean temperature was

1.4

ºC

which is

-1.4

degC

compared with the 1971-2000 average

Mean day maximum (09-21) was

3.7

ºC

which is

-1.6

degC

compared with the 1971-2000 average

Mean night minimum (21-09) was

-0.8

ºC

which is

-1.2

degC

compared with the 1971-2000 average

Mean 24hr maximum (09-09) was

4.3

ºC

Mean 24hr minimum (09-09) was

-1.4

ºC

Highest day max was

8.4

ºC

on  the

22

Lowest day max was

-1.8

ºC

on  the

6

Highest night min was

5.8

ºC

on  the

12

Lowest night min was

-11.8

ºC

on  the

7

Lowest grass min was

-16.6

ºC

on  the

7

Total rainfall this month was

60.2

mm

which is

89.9

per  cent

of the 1971-2000 average

Highest daily fall was

10.3

mm

on  the

21

Number of hours with rain was

TSR rainfall duration was

59.2

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

21

Mean rainfall intensity

1.02

mm/hr

Total CS sunshine this month was

65.9

hrs

which is

125.3

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

7.1

hrs

on  the

6

Maximum  snow depth  was

4.0

cm

on  the

5

Mean sea-level pressure at 09Z

1011.1

mbar

which is

-3.5

mbar

compared with the 1961-1990 average

Highest pressure at 09Z

1031.2

mbar

on  the

1

Lowest  pressure at 09Z

972.6

mbar

on  the

23

Number of days with:

Air Frost

16

0.2mm rain

15

No  sun

9

Snow lying

7

Grnd Frost

21

1.0mm

13

3h  sun

11

Snow/sleet

4

Max < 0ºC

4

5mm

6

6h  sun

2

Hail

0

Max > 10

0

10mm

1

9h  sun

0

Thunder

0

Max > 20

0

25mm

0

12h sun

0

Fog at 09Z

7

Max > 30

0

15h sun

0

Gale

0

Notable events during the month: