Royston (Iceni) Weather Station

2008 Annual Summary 

Part 1 Temperature, Rainfall & Sunshine

 

 

 

 

 

            T e m p e r a t u r e (C)

 

 

 

 

 

 

 

 

     Rainfall (mm)

 

    Sunshine (Hours)

 

Month

Mean Maximum

Highest Maximum

Date(s)

Lowest Maximum

Date(s)

Mean Minimum

Highest Minimum

Date(s)

Lowest Minimum

Date(s)

Mean Grass Minimum

Lowest Grass Minimum

Date(s)

Mean Dry Bulb (5 min. obs.)

Mean Earth 30cms 09 GMT

Mean Earth 30cms 21 GMT

No. of Air Frosts

No. of Ground Frosts

Air Frost Duration (Hours)

Total

No. of Days with 0.2mm or more

Most in a Day

Date(s)

Rainfall Duration (Hours)

Total

Highest

Date(s)

No. of Days no sun

Month

JAN

9.7

14.1

20

3.9

3

5.0

12.1

19, 20

0.3

28

3.3

-2.2

28

6.9

6.5

6.6

0

6

0.0

58.6

19

13.3

11

64.6

75.9

7.1

27

6

JAN

FEB

9.8

13.9

10

3.9

19

2.3

9.5

22

-5.5

17

-1.2

-11.3

17

5.4

5.0

5.1

7

14

69.9

12.9

7

3.7

4

20.1

145.0

9.4

18

2

FEB

MAR

10.1

14.7

30

3.4

23

3.2

8.7

2

-2.5

5

0.5

-7.8

5

6.0

6.9

7.2

5

11

49.8

78.2

19

22.0

15

69.3

117.5

10.5

30

1

MAR

APR

13.4

21.8

26

7.1

6

4.5

12.0

27

-0.5

6

1.6

-4.9

15

8.3

9.7

10.1

3

11

5.3

52.2

16

11.2

29

40.1

168.4

11.2

26

1

APR

MAY

19.2

26.5

11

11.9

16

8.9

12.9

9,10,28

1.5

19

6.6

-2.0

20

13.6

14.5

15.0

0

3

0.0

73.7

13

18.5

26

59.4

205.0

14.2

11

4

MAY

JUN

20.1

25.8

9

14.9

3

11.1

16.3

28

6.4

16

9.0

2.7

16

15.2

17.0

17.5

0

0

0.0

38.5

10

11.9

3

51.3

207.0

15.4

9

3

JUN

JUL

22.5

29.1

28

16.8

17

13.1

17.4

27

9.2

21

10.9

6.0

21, 22

17.4

18.4

18.9

0

0

0.0

59.0

16

15.8

9

45.0

212.2

14.9

1

2

JUL

AUG

21.3

25.0

30

17.1

8

13.7

17.5

29

9.3

23

11.7

6.9

23

16.9

18.4

18.7

0

0

0.0

92.0

19

40.4

7

53.2

126.4

11.8

15

1

AUG

SEP

18.3

20.9

19

14.8

30

10.3

14.6

11

6.5

 21 26

8.0

2.5

26

13.5

15.9

16.1

0

0

0.0

30.4

16

6.9

5

29.9

122.8

10.6

20

4

SEP

OCT

14.4

21.6

12

7.4

29

7.1

14.0

13

-2.5

29

4.6

-6.0

29

9.8

11.8

11.9

2

6

11.8

53.2

15

19.9

28

49.4

153.0

9.8

11

2

OCT

NOV

9.7

14.4

14

3.5

29

5.3

10.6

16

-2.2

23

3.5

-6.0

23

7.0

8.2

8.4

3

7

23.4

77.4

20

20.3

1

84.3

65.9

7.1

11

11

NOV

DEC

6.1

13.1

20

0.6

31

1.8

10.1

20

-3.3

30

-0.1

-7.5

30

3.6

5.3

5.4

12

18

83.4

22.2

11

9.9

13

26.0

88.5

6.8

10

7

DEC

YEAR

14.6

X

X

X

X

7.2

X

X

X

X

4.9

X

X

10.3

11.5

11.7

32

76

243.6

648.3

181

X

X

592.6

1687.6

X

X

44

YEAR

Part 2  Air Pressure, Wind Direction, Wind Speed, Humidity, Cloud Cover, Fog, Snow Falling, Snow Lying, Hail & Thunder

 

      P r e s s u r e (mb)

 

Wind Direction 0900 GMT (No. of  Days)

 

Wind Speed (MPH)

Humidity

Cloud

           No of Days With:

 

 

Month

Mean MSL Pressure

Highest

Date(s)

Lowest

Date(s)

N

NE

E

SE

S

SW

W

NW

CALM

Mean Wind Speed

Maximum Gust

Date

Mean Relative Humidity (5 min.obs.)

Mean Cloud Cover 09 GMT (oktas)

Fog (visibility < 1000m @ 09 GMT)

Fog (visibility < 200m @ 09 GMT)

Snow or Rain and Snow

Snow Lying (> 50% cover @ 09 GMT)

Hail

Thunder

Month

JAN

1009

1033

25, 28

971

15

0

0

2

1

6

12

10

0

0

9.0

76

17

90.4

5.9

2

1

1

0

0

0

JAN

FEB

1020

1043

16

985

4

0

2

3

1

6

9

4

1

3

6.0

58

29

85.3

3.7

2

1

0

0

0

0

FEB

MAR

1003

1034

5

958

10

4

1

0

2

4

5

10

5

0

8.2

62

1 11

82.8

5.9

1

0

4

1

3

0

MAR

APR

1008

1029

3

983

30

3

4

4

0

2

8

6

3

0

5.1

41

1

81.2

5.1

0

0

2

1

3

2

APR

MAY

1013

1024

5

998

28

1

16

2

7

1

2

1

1

0

3.0

39

26

78.5

4.6

0

0

0

0

0

2

MAY

JUN

1013

1023

9

1000

19

3

3

0

2

1

3

11

7

0

5.0

41

22

77.0

5.1

1

0

0

0

0

0

JUN

JUL

1010

1024

23

991

7

1

0

2

3

3

9

8

5

0

4.9

37

19

76.1

4.7

0

0

0

0

0

3

JUL

AUG

1006

1018

26

983

12

1

0

0

1

3

13

10

3

0

6.0

46

13

83.6

5.8

1

0

0

0

0

2

AUG

SEP

1014

1036

26

983

5

2

4

2

0

4

6

4

5

3

3.8

44

3

86.0

5.6

2

1

0

0

0

1

SEP

OCT

1011

1029

9

992

 5, 30

1

1

0

1

4

11

7

6

0

6.1

46

1

87.8

4.3

0

0

1

0

0

0

OCT

NOV

1010

1034

17

983

23

5

3

1

1

4

4

7

3

2

5.6

46

9 10

93.4

6.0

3

1

1

0

0

0

NOV

DEC

1016

1038

26

975

4

1

2

3

0

5

5

7

6

2

4.6

46

19

94.9

5.1

0

0

0

0

0

0

DEC

YEAR

1011.1

X

X

X

X

22

36

19

19

43

87

85

45

10

5.6

X

X

84.8

5.2

12

4

9

2

6

10

YEAR

Click on the links below to access the graphs and charts representing the data in the above tables.........

1. Monthly Mean Maximum & Minimum Temperatures   2. Monthly Temperature Extremes

3. Monthly Mean Earth (30 cms Depth) Temperature   4. Monthly Frequency of Air & Ground Frost, and Air Frost Duration

5. Monthly Rainfall   6. Monthly Rainfall Duration  7. Monthly Sunshine Duration

8. Monthly Rainfall & Mean MSL Air Pressure  9. Monthly Mean, Highest and Lowest MSL Air Pressure

10. Monthly Wind Direction Frequency @ 0900 GMT 

11. Monthly Maximum Gust & Mean Wind Speed   12. Monthly Mean Relative Humidity

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(This page last updated 17th January 2009 2024 GMT)