FAIR ISLE MONTHLY DATA FOR 1999

Year=

1999

JAN

FEB

MAR

APR

MAY

JUN

JUL

AUG

SEP

OCT

NOV

DEC

TOTAL

MEAN

MAX

MONTH

MIN

MONTH

TEMPERATURE (°C)

Tnmx

Mean

6.1

4.8

6.0

7.3

8.5

10.4

12.3

13.0

12.8

10.5

8.9

5.7

8.8

13.0

AUGUST

4.8

FEBRUARY

21-09 UTC

Maximum

8.7

10.2

8.9

10.7

10.5

12.0

14.5

17.3

14.9

12.7

12.0

10.6

11.9

17.3

AUGUST

8.7

JANUARY

Minimum

3.8

0.0

3.2

3.8

5.3

8.4

10.6

10.8

8.8

8.4

4.0

-0.1

5.6

10.8

AUGUST

-0.1

DECEMBER

Tdmx

Mean

6.3

5.0

6.9

8.0

9.5

11.3

13.4

14.1

13.6

10.9

9.1

5.6

9.5

14.1

AUGUST

5.0

FEBRUARY

09-21GMT

Maximum

8.7

10.2

9.6

10.8

11.9

14.0

15.1

18.7

15.7

13.0

12.0

10.5

12.5

18.7

AUGUST

8.7

JANUARY

Minimum

3.7

0.0

3.0

3.7

7.0

9.0

11.4

12.1

11.0

8.6

3.3

0.7

6.1

12.1

AUGUST

0.0

FEBRUARY

Date highest

21-21 UTC max

30

3

29

9

20

29

8

4

5

10

4

6

Date lowest

09-21 UTC max

10

16

22

13

12

3

22

22

29

26

17

18

Tnmn

Mean

4.1

1.8

4.0

4.7

6.3

8.0

10.0

10.3

10.8

8.2

6.5

2.7

6.4

10.8

SEPTEMBER

1.8

FEBRUARY

21-09GMT

Maximum

7.2

6.8

7.9

7.7

8.3

10.4

12.3

13.7

12.8

10.7

10.0

8.7

9.7

13.7

AUGUST

6.8

FEBRUARY

Minimum

0.2

-3.1

1.2

-1.0

2.4

3.8

8.1

7.6

6.2

5.5

-0.3

-3.4

2.3

8.1

JULY

-3.4

DECEMBER

Tdmn

Mean

4.1

1.9

4.2

5.4

7.1

8.9

10.8

11.2

11.2

8.4

6.3

3.1

6.9

11.2

AUGUST

1.9

FEBRUARY

09-21GMT

Maximum

7.8

7.0

7.3

8.6

8.9

10.9

12.2

15.3

13.5

11.1

11.1

6.4

10.0

15.3

AUGUST

6.4

DECEMBER

Minimum

1.3

-3.8

0.6

-0.4

4.1

6.6

8.9

9.1

7.8

5.5

-0.4

-3.6

3.0

9.1

AUGUST

-3.8

FEBRUARY

Date highest

21-09 UTC min

2

2

17

9

28

26

9

3

20

24

1

6

Date lowest

21-21 UTC min

27

16

22

14

17

23

3

10

30

4

17

18

Tme24

Mean

5.2

3.4

5.3

6.3

7.8

9.7

11.6

12.2

12.1

9.5

7.7

4.3

7.9

12.2

AUGUST

3.4

FEBRUARY

Maximum

7.8

7.9

8.0

9.5

9.4

11.5

13.4

15.9

13.8

11.2

10.5

8.7

10.6

15.9

AUGUST

7.8

JANUARY

Minimum

2.4

-1.1

2.1

1.8

6.4

8.1

9.9

10.1

8.6

7.4

1.8

-1.6

4.6

10.1

AUGUST

-1.6

DECEMBER

Tgrass

Mean

1.9

0.0

2.3

3.4

4.9

6.9

9.0

8.6

9.5

6.3

4.5

0.4

4.8

9.5

SEPTEMBER

0.0

FEBRUARY

Sunset-09GMT

Maximum

6.1

4.4

6.2

7.5

8.4

10.8

12.2

12.8

12.7

10.1

9.0

5.0

8.8

12.8

AUGUST

4.4

FEBRUARY

Minimum

-2.9

-4.8

-3.0

-3.1

-1.2

0.2

4.3

1.0

2.3

0.8

-0.9

-4.0

-0.9

4.3

JULY

-4.8

FEBRUARY

Date lowest

read at 0900 UTC

11

9

2

14

17

24

19

24

29

6

17

19

T30

Mean

4.9

4.3

4.9

7.0

9.0

10.7

13.0

13.1

12.4

10.1

8.4

5.3

8.6

13.1

AUGUST

4.3

FEBRUARY

Maximum

6.1

6.0

6.1

8.2

10.2

12.6

13.4

14.1

12.9

11.6

9.6

7.0

9.8

14.1

AUGUST

6.0

FEBRUARY

Minimum

3.9

3.5

3.9

6.2

8.0

9.9

12.3

12.5

11.9

9.5

6.8

4.2

7.7

12.5

AUGUST

3.5

FEBRUARY

T100

Mean

5.6

5.1

5.1

6.6

8.1

9.7

11.6

12.2

11.9

10.5

9.1

6.7

8.5

12.2

AUGUST

5.1

FEBRUARY

Maximum

6.3

5.8

5.8

7.3

9.0

10.7

12.0

12.5

12.1

11.8

9.9

8.0

9.3

12.5

AUGUST

5.8

FEBRUARY

Minimum

4.2

4.5

4.6

5.9

7.0

9.0

10.7

11.9

11.8

10.0

8.2

5.8

7.8

11.9

AUGUST

4.2

JANUARY

Tsea

Mean

8.5

7.4

7.7

8.1

9.2

10.3

12.3

12.8

12.7

11.5

10.6

9.0

10.0

12.8

AUGUST

7.4

FEBRUARY

Maximum

9.2

7.8

8.1

8.7

9.8

11.6

12.8

13.6

13.0

12.3

11.2

10.2

10.7

13.6

AUGUST

7.8

FEBRUARY

Minimum

7.7

6.9

7.0

7.7

8.5

9.7

11.7

12.6

12.4

11.1

10.1

8.2

9.5

12.6

AUGUST

6.9

FEBRUARY

Date highest

Sea Temp

10

1

14

28

21

30

14

6

24

1

3

1

Date lowest

Sea Temp

19

9

2

16

2

2

2

22

29

27

26

15

RAINFALL (mm)

RRtot

Total

86.7

115.6

84.9

48.8

95.4

102.4

41.6

51.8

71.9

131.0

118.7

183.9

1132.7

183.9

DECEMBER

41.6

JULY

09-09 UTC

Mean

2.8

4.1

2.9

2.1

5.0

3.8

2.0

3.5

3.1

4.5

4.0

6.1

3.7

6.1

DECEMBER

2.0

JULY

Maximum

10.5

11.6

15.7

14.6

26.6

15.2

16.9

13.5

21.7

23.6

17.3

29.9

18.1

29.9

DECEMBER

10.5

JANUARY

Date wettest

day 09-09 UTC

23

20

2

20

28

19

22

25

6

2

5

22

SUNSHINE (hours)

Suntot

Total

36.0

59.1

122.6

158.4

206.6

151.5

124.9

207.2

112.0

58.4

25.9

15.3

1277.9

207.2

AUGUST

15.3

DECEMBER

Mean

1.2

2.1

4.0

5.3

6.7

5.1

4.0

6.7

3.7

1.9

0.9

0.5

3.5

6.7

AUGUST

0.5

DECEMBER

Maximum

4.5

5.9

9.9

12.5

15.7

16.6

11.7

15.3

11.4

7.2

3.6

3.2

9.8

16.6

JUNE

3.2

DECEMBER

Date sunniest

day

8

27

27

17

17

23

11

4

14

1

8

10

SNOWDEPTH (cm)

At 0900 UTC

Mean

0.0

1.6

1.0

1.6

1.6

FEBRUARY

0.0

JANUARY

Maximum

0

12

1

6

12.0

FEBRUARY

0.0

JANUARY

::

PRESSURE (mb)

PPP00

Mean

997.7

1005.5

1003.5

1010.3

1014.4

1013.6

1014.7

1013.8

1005.9

1009.2

1012.0

995.3

1008.0

1014.7

JULY

995.3

DECEMBER

Maximum

1032.7

1035.6

1020.8

1033.3

1029.5

1028.0

1031.8

1025.5

1021.2

1030.6

1043.5

1023.9

1029.7

1043.5

NOVEMBER

1020.8

MARCH

Minimum

965.9

981.5

978.5

988.6

988.9

995.9

992.7

994.0

991.7

976.6

986.8

963.3

983.7

995.9

JUNE

963.3

DECEMBER

PPP06

Mean

997.9

1004.5

1002.9

1009.6

1013.6

1012.9

1014.0

1013.4

1005.2

1008.8

1011.5

994.0

1007.4

1014.0

JULY

994.0

DECEMBER

Maximum

1033.3

1034.7

1020.7

1033.4

1029.6

1028.0

1031.7

1024.9

1021.5

1030.0

1042.5

1024.0

1029.5

1042.5

NOVEMBER

1020.7

MARCH

Minimum

967.0

985.3

975.6

986.9

985.0

994.7

992.7

995.2

990.2

976.3

988.6

943.9

981.8

995.2

AUGUST

943.9

DECEMBER

PPP09

Mean

998.5

1004.6

1003.4

1010.1

1013.9

1013.2

1014.3

1013.7

1005.6

1009.2

1012.1

994.5

1007.8

1014.3

JULY

994.5

DECEMBER

Maximum

1034.2

1034.4

1022.0

1033.8

1030.4

1028.4

1031.7

1025.9

1021.6

1030.7

1043.3

1024.3

1030.1

1043.3

NOVEMBER

1021.6

SEPTEMBER

Minimum

967.5

983.6

978.2

990.5

987.8

994.5

992.7

996.1

989.7

977.3

984.4

945.5

982.3

996.1

AUGUST

945.5

DECEMBER

PPP12

Mean

998.3

1004.4

1003.7

1010.5

1014.2

1013.4

1014.6

1013.7

1005.7

1009.0

1012.4

994.8

1007.9

1014.6

JULY

994.8

DECEMBER

Maximum

1035.1

1033.6

1022.8

1033.9

1030.7

1028.2

1031.2

1026.1

1020.8

1030.6

1044.0

1023.3

1030.0

1044.0

NOVEMBER

1020.8

SEPTEMBER

Minimum

965.9

981.5

980.4

992.0

989.3

994.6

994.7

994.9

988.6

977.2

982.3

950.3

982.6

994.9

AUGUST

950.3

DECEMBER

PPP15

Mean

997.7

1003.8

1003.6

1010.3

1014.3

1013.3

1014.6

1013.6

1005.2

1008.8

1012.1

995.2

1007.7

1014.6

JULY

995.2

DECEMBER

Maximum

1034.8

1033.5

1021.3

1033.3

1029.9

1028.0

1030.2

1026.3

1019.1

1030.0

1043.6

1022.4

1029.4

1043.6

NOVEMBER

1019.1

SEPTEMBER

Minimum

964.1

980.1

981.4

991.0

991.5

995.1

994.4

994.4

986.9

977.6

980.0

954.6

982.6

995.1

JUNE

954.6

DECEMBER

PPP18

Mean

997.7

1003.8

1003.8

1010.3

1014.2

1013.1

1014.6

1013.5

1004.9

1009.1

1012.3

995.7

1007.7

1014.6

JULY

995.7

DECEMBER

Maximum

1035.1

1033.6

1022.0

1032.6

1028.8

1027.8

1030.4

1025.7

1017.3

1029.6

1043.6

1021.9

1029.0

1043.6

NOVEMBER

1017.3

SEPTEMBER

Minimum

963.5

979.7

982.4

990.4

992.2

994.9

993.6

993.7

985.4

979.1

981.6

960.0

983.0

994.9

JUNE

960.0

DECEMBER

PPP21

Mean

998.3

1004.1

1004.2

1010.7

1014.6

1013.4

1015.0

1013.8

1005.3

1009.3

1012.3

995.8

1008.1

1015.0

JULY

995.8

DECEMBER

Maximum

1035.4

1033.4

1021.8

1032.3

1029.2

1028.2

1031.1

1025.9

1020.0

1030.2

1043.4

1023.0

1029.5

1043.4

NOVEMBER

1020.0

SEPTEMBER

Minimum

964.7

980.5

981.8

992.7

989.9

995.3

993.3

994.0

985.0

977.5

983.8

963.9

983.5

995.3

JUNE

963.9

DECEMBER

PPPme24

Mean

998.0

1004.4

1003.6

1010.3

1014.2

1013.3

1014.5

1013.7

1005.4

1009.0

1012.1

995.0

1007.8

1014.5

JULY

995.0

DECEMBER

Maximum

1034.4

1034.1

1020.4

1033.2

1029.7

1028.1

1030.4

1025.6

1019.7

1030.1

1042.9

1022.5

1029.3

1042.9

NOVEMBER

1019.7

SEPTEMBER

Minimum

969.0

983.1

980.0

992.4

990.2

995.1

996.0

995.5

988.2

977.9

987.2

954.5

984.1

996.0

JULY

954.5

DECEMBER

Highest monthly

pressure

1035.4

1035.6

1022.8

1033.9

1030.7

1028.4

1031.8

1026.3

1021.6

1030.7

1044.0

1024.3

1030.5

1044.0

NOVEMBER

1021.6

SEPTEMBER

Date highest

pressure

31

1

17

27

17

11

9

21

10

18

10

20

Lowest monthly

pressure

963.5

979.7

975.6

986.9

985.0

994.5

992.7

993.7

985.0

976.3

980.0

943.9

979.7

994.5

JUNE

943.9

DECEMBER

Date lowest

pressure

15

21

3

12

22

4

14

14

30

2

30

25

CLOUD (okta)

Cloud amount

Mean 00-00 UTC

5.7

6.3

5.9

5.9

5.9

6.4

6.6

5.4

6.2

6.2

6.2

6.1

6.1

6.6

JULY

5.4

AUGUST

Maximum

7.4

8.0

8.0

8.0

8.0

8.0

8.0

8.0

8.0

8.0

8.0

7.7

7.9

8.0

FEBRUARY

7.4

JANUARY

Minimum

2.6

3.7

2.7

0.0

1.1

2.0

4.1

1.0

1.9

1.9

1.9

2.4

2.1

4.1

JULY

0.0

APRIL

RELATIVE HUMIDITY (%)

Relative

Mean 00-00 UTC

82.0

80.4

84.2

87.4

85.1

90.4

90.9

84.6

92.3

92.3

92.3

77.2

86.6

92.3

SEPTEMBER

77.2

DECEMBER

Humidity

Maximum

97.4

94.4

99.6

99.3

99.9

98.0

99.4

99.3

99.7

99.7

99.7

91.7

98.2

99.9

MAY

91.7

DECEMBER

Minimum

70.1

63.3

72.9

58.0

68.0

70.0

80.9

69.7

77.3

77.3

77.3

55.6

70.0

80.9

JULY

55.6

DECEMBER

::

DAYS WITH:

Number

Hail types 1-4

12

14

6

9

2

0

0

0

0

0

0

19

62

19

DECEMBER

0

JUNE

of Days

Hail types 5+

0

4

0

0

0

0

0

0

0

0

0

2

6

4

FEBRUARY

0

JANUARY

Thunder

0

3

0

0

0

0

0

0

0

0

0

0

3

3

FEBRUARY

0

JANUARY

Fog at 0900 UTC

0

1

1

7

1

2

6

2

5

5

5

0

35

7

APRIL

0

JANUARY

Fog in 24 hours

1

12

4

13

6

14

13

8

11

11

11

3

107

14

JUNE

1

JANUARY

Gale

9

8

3

2

2

0

0

0

1

1

1

11

38

11

DECEMBER

0

JUNE

Snow/Sleet

11

19

8

8

0

0

0

0

0

0

0

16

62

19

FEBRUARY

0

MAY

Snow lying

1

13

0

0

0

0

0

0

0

0

0

3

17

13

FEBRUARY

0

MARCH

Aurora

2

1

3

1

0

0

0

3

3

3

3

7

26

7

DECEMBER

0

MAY

Rain Days >0.1 mm

27

27

23

19

15

21

17

11

17

17

17

30

241

30

DECEMBER

11

AUGUST

Wet Days >0.9 mm

20

24

13

14

10

18

12

8

12

12

12

23

178

24

FEBRUARY

8

AUGUST

Air Frost

0

7

0

4

0

0

0

0

0

0

0

3

14

7

FEBRUARY

0

JANUARY

Ground Frost

6

14

2

6

1

0

0

0

0

0

0

13

42

14

FEBRUARY

0

JUNE

NIL Sunshine

11

6

7

5

5

9

7

4

10

10

10

14

98

14

DECEMBER

4

AUGUST

WIND DIRECTION

Wind

North

3

4

4

2

4

6

2

6

0

0

0

5

36

6

JUNE

0

SEPTEMBER

Direction

North East

0

0

0

3

4

5

0

6

1

1

1

2

23

6

AUGUST

0

JANUARY

at 0900 UTC

East

0

0

1

7

9

0

4

2

6

6

6

0

41

9

MAY

0

JANUARY

South East

4

0

1

3

5

4

7

5

5

5

5

2

46

7

JULY

0

FEBRUARY

South

7

6

14

1

5

6

3

4

8

8

8

4

74

14

MARCH

1

APRIL

South West

9

5

2

6

2

4

5

2

4

4

4

5

52

9

JANUARY

2

MARCH

West

5

7

7

3

2

3

7

4

4

4

4

7

57

7

FEBRUARY

2

MAY

North West

3

5

2

5

0

2

3

2

2

2

2

6

34

6

DECEMBER

0

MAY

Calm

0

1

0

0

0

0

0

0

0

0

0

0

1

1

FEBRUARY

0

JANUARY

DAILY WIND SPEED (kt)

Wind Speed

Mean

17.4

21.2

17.1

13.8

13.6

11.9

12.5

10.6

12.3

12.3

12.3

19.6

14.6

21.2

FEBRUARY

10.6

AUGUST

Maximum

35.6

44.7

29.9

27.1

32.1

21.7

90.9

22.4

22.1

22.1

22.1

31.6

33.5

90.9

JULY

21.7

JUNE

Minimum

6.4

7.0

9.3

7.9

4.4

3.7

3.3

3.4

4.0

4.0

4.0

8.0

5.5

9.3

MARCH

3.3

JULY

Gust 00-00 UTC

Mean

37.0

45.3

37.2

32.3

28.4

25.6

22.0

22.9

26.9

26.9

26.9

41.5

31.1

45.3

FEBRUARY

22.0

JULY

Maximum

59

85

75

64

57

41

35

38

51

51

51

60

55.6

85

FEBRUARY

35

JULY

Date highest

gust

12

4

3

21

22

5

17

29

8

8

8

23

 

 

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Last edited on 17 January, 2000   Dave Wheeler weatherman@zetnet.co.uk
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