Royston (Iceni) Weather Station

2002 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 0900 GMT

Mean Earth 30cms 2100 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

8.6

13.5

27

2.2

2

4.4

11.5

21

-3.5

4

2.4

-7.9

2

5.8

4.7

4.9

4

8

40.6

33.2

14

7.2

26

44.5

68.0

7.2

19

8

JAN

FEB

10.7

13.3

11

6.5

23

4.9

12.2

2

-2.5

15

2.7

-6.9

15

6.6

6.6

6.8

4

8

30.6

48.9

17

9.6

3

61.6

87.6

8.4

15

8

FEB

MAR

12.2

16.7

30

7.2

13

4.2

10.2

7

-2.8

2

1.5

-7.3

2

7.4

7.8

8.3

1

11

11.4

35.5

10

10.1

18

53.3

129.3

12.1

28

2

MAR

APR

15.2

22.7

23

10.3

9

4.7

9.5

3

-0.1

7

2.3

-3.4

7

9.2

10.7

11.3

1

10

1.0

35.9

9

10.3

30

34.7

208.2

13.4

23

0

APR

MAY

17.0

23.5

16

11.5

9

8.3

13.0

21

1.5

5

6.8

-1.6

5

11.9

13.8

14.5

0

1

0.0

60.6

16

11.2

13

53.6

173.3

14.3

16

3

MAY

JUN

20.0

27.7

17

14.5

5

11.2

15.5

17 18

8.1

28 29

9.3

5.5

29

15.3

17.2

17.8

0

0

0.0

29.4

13

10.5

5

27.0

188.0

16.1

17

3

JUN

JUL

22.0

30.8

29

16.5

3

12.7

17.2

30

9.0

14

11.0

6.4

14

16.8

18.4

19.0

0

0

0.0

104.7

13

48.8

30

58.4

180.1

15.0

14

0

JUL

AUG

22.6

30.0

17

16.3

26

13.9

17.2

19

11.0

21 26

12.1

8.9

21

17.6

19.4

19.9

0

0

0.0

49.6

11

17.4

7

35.6

141.1

12.0

14

1

AUG

SEP

19.6

24.5

13

15.8

18

10.1

14.9

6

4.7

24

7.8

2.1

24

14.1

16.3

16.8

0

0

0.0

38.0

6

32.9

9

16.6

158.1

11.7

1

0

SEP

OCT

14.1

21.5

1

10.0

30

7.7

13.6

2

1.1

19

5.5

-1.9

19

10.0

11.8

12.0

0

0

0.0

65.5

15

21.4

15

62.3

98.0

8.9

4

6

OCT

NOV

11.1

15.4

2

7.9

25

6.6

12.3

6

1.5

18

4.4

-2.4

18

8.1

9.0

9.1

0

1

0.0

98.0

22

12.8

6

115.8

71.4

7.9

4

7

NOV

DEC

7.6

12.9

24

1.7

10

4.4

9.7

24

-1.2

20

2.7

-5.6

20

5.4

6.7

6.8

5

8

27.4

83.5

21

18.0

21

120.3

30.4

6.7

9

15

DEC

YEAR

15.1

X

X

X

X

7.8

X

X

X

X

5.7

X

X

10.7

11.9

12.3

15

47

111.0

682.8

167

X

X

683.7

1533.5

X

X

53

YEAR

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

 

     Air P r e s s u r e (mb)

 

      Wind Direction 0900h  (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 09h (oktas)

Fog (visibility < 1000m @ 0900 GMT)

Fog (visibility < 200m @ 0900 GMT)

Snow or Rain and Snow

Snow Lying (> 50% cover @ 0900 GMT)

Hail

Thunder

Month

JAN

1018.9

1040

1

977

24

0

0

0

4

8

12

5

0

2

6.8

58

28

91.1

5.7

2

1

0

0

0

0

JAN

FEB

1009.3

1037

15

981

26

1

0

0

0

6

10

8

0

3

9.8

65

26

84.4

5.5

1

1

1

0

1

0

FEB

MAR

1017.6

1037

24

986

18

2

4

3

1

6

7

6

1

1

4.9

62

9 10

81.6

5.6

0

0

0

0

0

0

MAR

APR

1016.7

1036

21

990

29

3

7

0

2

4

4

6

4

0

4.3

53

28

74.7

3.8

1

0

0

0

2

0

APR

MAY

1012.1

1027

31

991

22

4

3

1

2

7

9

2

3

0

4.7

46

24

79.9

5.6

1

0

0

0

1

2

MAY

JUN

1014.7

1029

24 25

996

5

2

0

0

3

3

9

12

1

0

4.3

37

10

74.0

5.1

0

0

0

0

0

1

JUN

JUL

1014.5

1029

14

991

3

6

1

0

1

3

8

6

5

1

3.2

39

23

76.7

4.8

0

0

0

0

0

6

JUL

AUG

1015.6

1031

31

1001

9

7

1

0

2

1

3

5

6

6

1.6

28

17 30

80.5

5.5

0

0

0

0

0

2

AUG

SEP

1020.9

1033

1

1001

9

7

7

0

2

2

4

0

3

5

1.7

41

6

79.0

4.9

2

1

0

0

0

0

SEP

OCT

1011.0

1031

4

977

22

1

4

0

5

2

1

8

4

6

3.3

71

27

84.7

5.7

0

0

0

0

0

0

OCT

NOV

1004.5

1024

5

968

14

0

0

1

5

9

7

3

1

4

3.9

46

14

94.5

5.6

4

2

0

0

0

1

NOV

DEC

1013.5

1035

18

987

27

2

8

4

2

4

4

3

2

2

3.6

46

30

93.7

6.9

2

1

0

0

0

0

DEC

YEAR

1014.1

X

X

X

X

35

35

9

29

55

78

64

30

30

4.3

X

X

82.9

5.4

13

6

1

0

4

12

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 14th January 2003 2037 GMT)