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  Home - Climate - 30 Year Averages - Roche's Point

 

30 Year Averages


Please choose a 30 year average report from any station by clicking on the map or one of the links below:

ROCHE'S POINT

monthly and annual mean and extreme values

1961-1990

TEMPERATURE (degrees Celsius)

jan

feb

mar

apr

may

jun

jul

aug

sep

oct

nov

dec

year

mean daily max.

8.5

8.3

9.6

11.4

13.7

16.4

18.2

18.1

16.2

13.7

10.7

9.3

12.8

mean daily min.

4.1

4.1

4.5

5.6

7.8

10.3

12.0

12.0

10.7

8.9

6.0

5.1

7.6

mean

6.3

6.2

7.1

8.5

10.7

13.4

15.1

15.1

13.5

11.3

8.3

7.2

10.2

absolute max.

13.5

14.0

14.9

20.1

21.5

25.3

27.5

26.5

23.3

19.1

16.4

14.4

27.5

absolute min.

-7.2

-5.1

-3.4

-0.3

0.8

3.4

7.2

6.8

4.7

1.9

-0.9

-3.7

-7.2

mean no. of days with air frost

2.5

2.0

0.9

0.1

0.0

0.0

0.0

0.0

0.0

0.0

0.2

1.3

7.0

mean no. of days with ground frost

10.2

7.3

6.6

5.1

1.2

0.1

0.0

0.0

0.1

0.9

5.2

8.0

44.6

RELATIVE HUMIDITY (%)

mean at 0900UTC

87

86

85

81

81

82

83

84

87

88

87

88

85

mean at 1500UTC

82

80

76

74

76

77

77

77

78

81

81

83

79

SUNSHINE (hours)

mean daily duration

1.79

2.31

3.50

5.27

6.18

5.92

5.57

5.21

4.27

2.87

2.34

1.66

3.91

greatest daily duration

8.3

9.2

11.6

13.7

15.1

15.8

15.4

14.4

12.8

9.9

8.7

7.1

15.8

mean no. of days with no sun

10

8

6

3

2

2

1

2

3

6

9

11

63

RAINFALL (mm)

mean monthly total

104.2

87.2

76

55.3

63.3

54

53.6

80.1

78.1

95.7

87.9

100.3

935.7

greatest daily total

47.0

40.2

38.4

37.5

35.5

44.5

46.9

84.4

50.9

54.8

46.1

58.1

84.4

mean no. of days with >= 0.2mm

19

16

16

13

15

13

11

14

15

17

17

17

184

mean no. of days with >= 1.0mm

15

13

11

10

11

9

8

11

10

12

12

13

135

mean no. of days with >= 5.0mm

7

6

5

4

4

3

3

5

5

6

6

7

63

WIND (knots)

mean monthly speed

14.6

14.0

13.4

11.8

11.5

10.3

9.9

10.3

11.2

12.7

13.0

14.1

12.2

max. gust

86

82

76

71

58

53

57

60

75

83

75

78

86

max. mean 10-minute speed

62

56

52

53

43

41

40

42

52

54

49

53

62

mean no. of days with gales

6

4.4

4.2

1.8

1.5

0.3

0.5

0.9

1.8

3.1

3.5

5.3

33.3

WEATHER (mean no. of days with...)

snow or sleet

2.6

3.0

1.3

0.3

0.1

0.0

0.0

0.0

0.0

0.0

0.2

1.1

8.7

snow lying at 0900UTC

0.5

0.6

0.1

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.1

1.3

hail

1.0

1.0

2.4

1.6

0.8

0.1

0.0

0.1

0.0

0.2

0.3

0.4

8.0

thunder

0.2

0.3

0.1

0.1

0.5

0.7

0.8

0.6

0.4

0.3

0.1

0.1

4.2

fog

2.9

2.4

3.6

3.7

4.2

5.1

4.9

5.1

4.9

4.3

2.8

2.7

46.5

 

 
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