Royston (Iceni) Weather Station

2012 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

8.7

12.1

3

1.8

31

3.7

10.9

1

-3.1

14

1.4

-7.3

14

5.5

5.7

5.9

5

13

43.6

42.8

16

12.4

18

X

78.7

7.1

27

5

JAN

FEB

7.1

16.9

23

-0.3

4

0.9

10.3

23

-11.5

11

-1.5

-15.3

11

3.6

3.8

4.0

12

17

200.3

22.3

9

13.0

4

X

106.1

9.3

23

7

FEB

MAR

13.6

21.6

28

7.5

5

4.0

7.5

10

0.5

26

1.1

-3.2

26

8.2

7.7

8.3

0

10

0.0

20.5

7

14.0

4

X

188.0

12.2

27

4

MAR

APR

13.0

18.3

30

8.0

28

4.2

8.1

26 27

-2.1

6

2.0

-7.0

6

7.7

9.5

10.2

3

8

16.4

113.1

22

26.2

28

X

143.1

12.3

1

2

APR

MAY

17.2

26.9

28

8.0

3

8.3

13.6

10

2.0

7

7.0

-1.6

7

12.2

13.2

14.0

0

1

0.0

65.0

13

28.4

2

X

156.0

15.7

27

2

MAY

JUN

18.7

28.3

28

10.7

3

10.7

17.1

27

5.4

13

9.4

2.7

13

14.2

16.0

16.8

0

0

0.0

125.1

19

24.3

10

X

152.6

12.2

19

2

JUN

JUL

21.1

29.7

25

15.7

14

12.5

15.8

5

8.7

21

11.1

6.5

21

16.1

18.3

19.1

0

0

0.0

136.4

21

33.7

13

X

177.4

15.2

23

0

JUL

AUG

23.1

31.4

18

16.1

30

13.5

19.3

18

4.7

31

11.5

2.0

31

17.5

18.9

19.7

0

0

0.0

29.1

15

7.6

29

X

197.0

13.6

10

0

AUG

SEP

19.7

28.5

9

13.2

23

9.7

15.0

10

3.2

22

7.5

0.8

22

13.9

15.6

16.3

0

0

0.0

27.6

8

14.5

23

X

189.7

12.5

6

0

SEP

OCT

13.7

17.5

1, 2

7.7

27

7.4

13.1

1

0.9

27

5.2

-2.1

28

9.9

11.7

12.0

0

4

0.0

85.6

22

15.3

5

X

109.3

9.4

6

1

OCT

NOV

9.9

15.1

13

3.8

30

4.9

9.9

20

-1.5

30

2.7

-6.0

30

6.9

8.0

8.1

1

8

16.0

71.4

16

13.1

24

X

89.5

7.5

11

6

NOV

DEC

7.8

13.1

22

-0.2

11

2.8

10.7

23

-7.0

12

0.5

-9.6

12

4.8

5.0

5.5

7

14

102.2

97.7

20

18.5

19

X

64.9

6.7

2

9

DEC

YEAR

14.5

X

X

X

X

6.9

X

X

X

X

4.8

X

X

10.0

11.1

11.7

28

75

378.5

836.6

188

X

X

X

1652.3

X

X

38

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

1019.8

1033.5

13

991.9

3

2

0

2

2

5

10

7

2

1

8.0

51

3

86.5

5.8

1

1

1

0

0

0

JAN

FEB

1028.9

1043.8

7

1005.6

18

0

4

0

2

4

8

5

6

0

6.0

40

18

85.0

4.9

1

0

4

9

0

0

FEB

MAR

1027.1

1037.7

27

1009.0

7

2

2

3

5

3

3

8

5

0

5.0

34

7

80.9

5.0

5

2

0

0

0

0

MAR

APR

1003.5

1026.7

16

976.9

18

1

6

0

3

3

4

7

6

0

6.4

38

26

82.5

4.6

0

0

0

0

4

2

APR

MAY

1016.1

1038.1

12

1003.1

18

5

10

1

1

2

4

2

6

0

5.2

42

10

82.3

5.7

2

0

0

0

1

2

MAY

JUN

1010.4

1019.8

26

990.7

8

2

2

2

4

5

11

2

2

0

6.9

39

8

81.0

5.8

0

0

0

0

0

0

JUN

JUL

1012.5

1026.6

22

998.2

13

2

3

0

1

5

7

10

3

0

5.7

34

16

81.6

5.2

0

0

0

0

0

1

JUL

AUG

1013.2

1029.3

31

998.0

25

1

1

2

2

8

9

7

1

0

5.7

29

15

78.5

5.1

0

0

0

0

0

2

AUG

SEP

1013.7

1029.1

6

983.7

24

1

1

1

1

3

6

14

3

0

6.6

38

24

77.1

4.2

0

0

0

0

0

0

SEP

OCT

1009.1

1024.1

23

977.0

31

2

3

1

4

4

7

7

2

1

5.7

39

16

89.4

5.4

4

3

1

0

0

0

OCT

NOV

1008.3

1026.9

13, 14

974.6

1

1

1

1

3

12

5

5

2

0

6.7

46

25

90.9

5.1

1

1

0

0

0

0

NOV

DEC

1006.6

1030.7

11

973.1

14

1

0

0

5

7

8

7

3

0

8.5

43

14

91.0

5.5

1

1

2

2

0

0

DEC

YEAR

1014.1

X

X

X

X

20

33

13

33

61

82

81

41

2

6.4

X

X

83.9

5.2

15

8

8

11

5

7

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 16th January 2013 2123 GMT)