Monthly Climate Summary for  January 2010  at Luton (Cranleigh Gardens)

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Very cold first half with frequent snow;  variable second half with near average temperature

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Overall mean temperature was

1.1

ºC

which is

-3.0

degC

compared with the 1971-2000 average

Mean day maximum (09-21) was

2.8

ºC

which is

-3.6

degC

compared with the 1971-2000 average

Mean night minimum (21-09) was

-0.7

ºC

which is

-2.4

degC

compared with the 1971-2000 average

Mean 24hr maximum (09-09) was

2.9

ºC

Mean 24hr minimum (09-09) was

-1.0

ºC

Highest day max was

8.6

ºC

on  the

18

Lowest day max was

-2.5

ºC

on  the

4

Highest night min was

4.4

ºC

on  the

19

Lowest night min was

-7.5

ºC

on  the

7

Lowest grass min was

-16.1

ºC

on  the

7

Total rainfall this month was

49.9

mm

which is

73.3

per  cent

of the 1971-2000 average

Highest daily fall was

8.3

mm

on  the

22

Number of hours with rain was

Equiv. TSR rainfall duration was

76.2

hrs

which is

111.7

per  cent

of the 1971-2000 average

Highest no of wet hrs

hrs

on  the

Highest duration

12.5

hrs

on  the

30

Mean rainfall intensity

0.65

mm/hr

Total CS sunshine this month was

43.8

hrs

which is

83.3

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

6.7

hrs

on  the

30

Maximum  snow depth  was

11.0

cm

on  the

7

Mean sea-level pressure at 09Z

1015.7

mbar

which is

+1.1

mbar

compared with the 1961-1990 average

Highest pressure at 09Z

1040.8

mbar

on  the

26

Lowest  pressure at 09Z

990.4

mbar

on  the

29

Number of days with:

Air Frost

19

0.2mm rain

18

No  sun

13

Snow lying

12

Grnd Frost

26

1.0mm

13

3h  sun

4

Snow/sleet

13

Max < 0ºC

5

5mm

4

6h  sun

3

Hail

1

Max > 10

0

10mm

0

9h  sun

0

Thunder

0

Max > 20

0

25mm

0

12h sun

0

Fog at 09Z

1

Max > 30

0

15h sun

0

Gale

0

Notable events during the month: