Monthly Climate Summary for September 1993 at Whipsnade, Beds

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Cool, dull, and very wet

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Overall mean temperature was

11.9

ºC

which is

-1.3

degC

compared with the 1971-2000 average

Mean day maximum (09-21) was

15.7

ºC

which is

-1.5

degC

compared with the 1971-2000 average

Mean night minimum (21-09) was

8.1

ºC

which is

-1.2

degC

compared with the 1971-2000 average

Mean 24hr maximum (09-09) was

15.7

ºC

Mean 24hr minimum (09-09) was

8.1

ºC

Highest day max was

23.4

ºC

on  the

1

Lowest day max was

7.9

ºC

on  the

27

Highest night min was

13.1

ºC

on  the

9

Lowest night min was

3.9

ºC

on  the

26

Lowest grass min was

ºC

on  the

Total rainfall this month was

123.9

mm

which is

217.4

per  cent

of the 1971-2000 average

Highest daily fall was

18.8

mm

on  the

13

Number of hours with rain was

Equiv. TSR rainfall duration was

hrs

which is

per  cent

of the 1971-2000 average

Highest no of wet hrs

hrs

on  the

Highest duration

hrs

on  the

Mean rainfall intensity

mm/hr

Total CS sunshine this month was

90.7

hrs

which is

66.4

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

10.6

hrs

on  the

1

Maximum  snow depth  was

0.0

cm

on  the

Mean sea-level pressure at 09Z

1011.9

mbar

which is

-4.5

mbar

compared with the 1961-1990 average

Highest pressure at 09Z

1031.0

mbar

on  the

1

Lowest  pressure at 09Z

991.9

mbar

on  the

13

Number of days with:

Air Frost

0

0.2mm rain

18

No  sun

5

Snow lying

0

Grnd Frost

0

1.0mm

14

3h  sun

14

Snow/sleet

0

Max < 0ºC

0

5mm

9

6h  sun

5

Hail

0

Max > 10

29

10mm

6

9h  sun

1

Thunder

2

Max > 20

3

25mm

0

12h sun

0

Fog at 09Z

2

Max > 30

0

15h sun

0

Gale

0

Notable events during the month:

<aximum of 7.9ºC on the 27th was abnormally low - possibly the lowest in September in this district since 1918