Royston (Iceni) Weather Station

2000 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 hrs

Mean Earth 30cms 21 hrs

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

JAN

7.6

13.4

29

3.4

13

3.0

9.5

31

-1.1

24

0.7

-5.6

25

4.7

4.3

4.5

5

14

19.5

25.4

14

5.9

3

35.0

86.8

7.5

27

5

FEB

9.7

13.6

8

6.5

16

3.6

8.3

1

-1.0

20

1.1

-5.6

20

6.1

5.4

5.6

3

10

16.2

66.5

21

12.7

24

70.3

114.8

9.3

25

2

MAR

11.6

16.5

8

6.5

29

4.5

10.5

8    9

-2.0

4

2.1

-5.6

4

7.2

7.8

8.2

1

9

7.3

11.3

9

4.3

2

19.4

120.4

11.0

12

5

APR

12.8

19.2

29

4.9

4

4.9

10.0

20

-1.5

6

3.2

-4.9

6

8.2

9.7

10.2

2

8

11.0

94.4

23

17.9

2

121.3

141.3

12.5

6

4

MAY

17.4

26.0

15

10.5

3

8.6

15.1

16

5.5

1 20 27

7.2

2.0

1

12.3

14.7

15.3

0

0

0.0

85.3

21

18.8

27

82.1

172.8

13.1

15

2

JUN

20.7

32.0

19

15.7

5

11.9

17.0

19

7.8

7

10.1

5.0

7

16.0

17.7

18.4

0

0

0.0

19.7

6

6.9

6

14.3

183.8

15.6

18

1

JUL

20.1

25.0

20 30 31

14.5

10

11.8

14.6

27 31

8.3

12 16

10.3

5.7

16

15.6

17.6

18.2

0

0

0.0

74.3

13

18.9

3

42.8

143.6

14.5

18

2

AUG

23.1

27.4

12

19.8

18

13.3

17.1

10 14

9.3

24

11.4

6.6

30

17.7

18.8

19.4

0

0

0.0

43.3

10

17.8

20

26.3

209.9

13.2

12

0

SEP

19.7

27.5

11

15.5

19

12.2

17.4

20

6.5

4

10.6

3.8

4

15.4

16.4

16.8

0

0

0.0

78.2

13

17.9

25

73.2

139.7

11.7

4

4

OCT

13.9

18.5

1

9.8

30

8.4

12.1

4

5.0

9

6.6

2.6

20

10.5

12.0

12.1

0

0

0.0

137.7

23

34.3

20

97.8

100.9

9.0

1

5

NOV

10.0

15.0

28

6.5

20

5.1

9.5

29

0.0

15

3.4

-3.1

15

6.9

7.5

7.6

0

3

0.0

118.2

20

22.6

5

111.3

84.6

7.4

1

6

DEC

7.7

13.5

11 12

-1.1

29

4.3

12.3

12

-5.1

29

2.8

-8.5

29

5.5

6.7

6.7

6

9

110.2

66.7

20

12.1

7

96.0

63.6

6.8

3

11

                                                         

YEAR

14.5

X

X

X

X

7.6

X

X

X

X

5.8

X

X

10.5

11.6

11.9

17

53

164.2

821.0

193

X

X

789.8

1562.2

X

X

47

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

 

  A i r   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 @ 09hr)

Fog (visibility < 200m @ 09hr)

Snow or Rain and Snow

Snow Lying (> 50% cover @ 09hr)

Hail

Thunder

JAN

1022.5

1041

16

994

29

2

1

0

0

4

10

7

6

1

5.8

46

      28    29

89.5

5.6

1

0

2

0

1

0

FEB

1016.8

1033

3

993

29

1

0

0

0

4

17

6

1

0

7.1

48

10

83.6

4.8

0

0

1

1

0

0

MAR

1021.1

1038

19

998

3

5

2

0

1

1

7

8

6

1

5.4

58

3

81.0

5.6

1

0

0

0

0

0

APR

1005.9

1035

7

981

12

3

6

0

0

10

6

2

2

1

3.9

48

17

83.6

5.3

0

0

1

0

2

0

MAY

1014.4

1027

2

993

28

9

3

0

0

3

6

6

4

0

3.6

39

  17   19   23

82.6

5.3

3

0

0

0

3

3

JUN

1018.1

1028

16

1007

9

2

1

0

3

6

9

6

2

1

4.3

37

     21     22

74.5

5.4

0

0

0

0

1

1

JUL

1013.3

1026

21

989

10

7

7

0

0

3

2

7

5

0

2.8

30

   9   10   11

78.3

6.2

0

0

0

0

0

3

AUG

1016.0

1025

5

1002

31

1

3

0

1

2

9

8

6

1

3.3

32

2

74.4

4.0

0

0

0

0

1

2

SEP

1010.4

1024

4

992

19

2

0

0

3

7

11

5

2

0

4.0

37

27

83.8

5.3

0

0

0

0

0

1

OCT

1006.7

1025

 6  21

962

11

0

0

0

1

7

12

8

2

1

5.5

62

30

87.2

5.7

2

0

0

0

0

0

NOV

997.0

1013

10

970

6

0

1

1

3

6

14

4

1

0

6.2

46

     5    22

90.6

5.4

0

0

0

0

0

1

DEC

1004.4

1018

21

979

8

1

2

2

6

6

7

5

0

2

5.9

78

13

90.9

5.8

2

1

2

4

0

0

                                                   

YEAR

1012.2

X

X

X

X

33

26

3

18

59

110

72

37

8

4.8

X

X

83.3

5.4

9

1

6

5

8

11

Click on the links below to access the graphs and charts accompanying this summary

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

3. Monthly Mean (30 cms depth) Earth Temperatures 4. Air & Ground Frosts 5. Rainfall

6. Rainfall Duration 7. Sunshine Duration 8. Rainfall/MSL Air Pressure

9. Mean Sea-Level Air Pressure 10. Wind Direction @ 0900 GMT

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

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(This page last updated 13th January 2001 2244 GMT)