Royston (Iceni) Weather Station  

1999 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

8.4

14.2

6

2.7

22

3.5

11.4

20

-4.0

23

1.2

-7.8

23

5.6

5.3

5.3

5

11

41.9

68.7

19

10.5

27

82.8

74.9

7.3

22

6

FEB

8.0

13.1

19

1.9

9

2.6

8.6

4

-4.0

9

0.1

-8.0

9

4.8

4.8

5.0

8

13

81.1

19.8

15

5.6

26

42.2

94.6

9.0

13

3

MAR

11.7

19.7

31

3.2

6

4.9

10.5

2

-1.4

11

2.5

-6.0

11

7.7

7.6

8.1

2

9

6.9

39.1

15

8.3

7

60.2

112.5

11.1

17

4

APR

14.8

19.9

30

9.1

13

5.8

12.1

5

-1.0

14

3.6

-4.5

15

9.5

11.2

11.7

2

4

6.8

29.0

13

5.8

20

32.6

160.2

13.9

30

2

MAY

18.8

24.5

29

13.0

30

9.1

14.7

28

4.5

17

7.0

1.1

17

13.4

15.1

15.7

0

0

0.0

26.8

13

11.7

30

17.1

174.5

13.7

27

2

JUN

19.6

25.9

16

14.5

12

10.2

14.3

27

6.1

8

8.4

4.2

9

14.6

17.3

18.0

0

0

0.0

78.2

16

20.4

1

49.1

220.3

16.4

25

2

JUL

24.1

29.6

31

16.7

22

13.3

17.9

3

8.0

27

11.0

4.9

27

18.2

19.9

20.6

0

0

0.0

50.3

9

24.9

6

10.3

241.5

15.2

18

0

AUG

21.7

30.9

2

15.8

10

13.0

18.0

3

5.6

22

10.9

3.5

22

16.8

18.4

18.9

0

0

0.0

77.6

13

24.1

8

47.5

148.4

11.6

1

4

SEP

21.3

28.9

11

13.5

14

12.6

16.1

11

8.5

10

10.6

5.7

10

16.2

17.2

17.6

0

0

0.0

67.7

19

14.4

19

52.3

168.7

12.3

2

3

OCT

14.9

18.0

 10 30

9.0

20

7.6

14.0

10

1.6

18

5.1

-2.5

18

10.3

11.8

12.0

0

7

0.0

45.5

10

11.6

1

41.0

146.5

9.7

13

2

NOV

10.2

16.5

1

5.3

18

5.4

11.5

1

0.0

18

3.3

-2.7

21

7.3

8.4

8.6

0

8

0.0

25.4

16

6.6

5

41.1

82.0

7.7

2

2

DEC

7.4

12.0

 3  24

0.6

19

2.6

9.5

1

-4.5

20

0.3

-8.0

20

4.2

5.0

5.0

7

13

70.3

73.2

21

12.9

22

68.9

81.2

6.4

19

7

                                                         

YEAR

15.1

X

X

X

X

7.6

X

X

X

X

5.3

X

X

10.7

11.8

12.2

24

65

207.0

601.3

179

X

X

545.1

1705.3

X

X

37

                                                         

PART 2 Pressure, Wind, Relative Humidity, Cloud Cover, Fog, Snow, Hail & Thunder

 

       P r e s s u r e (mb)

 

Wind Direction 0900 h (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

1010.3

1041

31

987

16

0

0

0

0

8

14

2

3

4

6.8

55

15

90.1

5.2

1

0

1

1

0

0

FEB

1016.9

1041

 1    2

1000

22

0

1

0

1

2

5

8

11

0

6.4

51

22 28

82.6

5.6

0

0

3

2

2

0

MAR

1009.3

1030

16

980

 3    4

2

1

1

1

4

6

7

8

1

4.7

51

2

82.6

5.2

2

0

1

0

1

0

APR

1011.8

1027

27

991

12

2

6

0

5

2

6

5

4

0

4.4

53

13

80.0

5.1

0

0

1

0

1

1

MAY

1014.2

1023

31

1006

7

2

8

1

2

1

11

5

0

1

3.9

37

21

75.6

5.2

0

0

0

0

0

2

JUN

1015.5

1027

15  18

997

6

2

4

0

2

1

5

9

6

1

3.0

39

2  4

73.3

4.3

0

0

0

0

0

4

JUL

1016.0

1029

8

1003

3

1

9

0

2

2

3

11

2

1

3.3

44

20

71.0

4.9

2

0

0

0

0

4

AUG

1011.2

1025

28

994

8

2

6

0

2

6

5

4

4

2

2.3

32

19

76.0

5.2

0

0

0

0

1

6

SEP

1006.7

1028

 9  10

986

20

1

3

0

3

9

6

4

3

1

3.6

32

18

81.1

5.1

2

0

0

0

0

4

OCT

1012.6

1031

13

971

24

0

4

2

1

4

8

8

1

3

3.9

41

2

84.6

3.4

0

0

0

0

0

0

NOV

1020.1

1038

9

991

5

6

2

0

0

3

8

5

4

2

4.9

46

30

88.6

5.1

0

0

0

0

1

0

DEC

1006.2

1028

20

976

24  25

1

0

0

0

4

13

9

2

2

7.5

55

 3   23

87.6

4.5

0

0

3

2

0

0

                                                   

YEAR

1012.6

X

X

X

X

19

44

4

19

46

90

77

48

18

4.6

X

X

81.1

4.9

7

0

9

5

6

21

                                                   

Click below for graphs and charts....

1. Maximum & Minimum Temperatures 2. Temperature Extremes 3. Earth Temperature

4. Rainfall 5. Rainfall Duration 6. Sunshine

7. Air & Ground Frosts 8. Wind Direction 9. Wind Speed

10. Relative Humidity 11. Air Pressure 12. Rainfall/Air Pressure

Return to  Welcome to Royston (Iceni) Weather Station  header page

(This page last updated 15th January 2000)