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Thursday, 24 April 2014
  
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  Home - Climate - 30 Year Averages - Birr

 

30 Year Averages


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

BIRR

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.

7.5

7.9

9.8

12.2

14.9

17.7

19.2

18.8

16.6

13.6

9.7

8.2

13.0

mean daily min.

1.8

1.8

2.5

3.5

5.9

8.7

10.7

10.3

8.5

6.7

3.1

2.5

5.5

mean

4.6

4.8

6.1

7.9

10.4

13.2

14.9

14.6

12.6

10.1

6.4

5.4

9.3

absolute max.

13.8

15.0

19.7

23.7

25.7

31.2

30.8

29.3

24.5

22.3

17.5

15.3

31.2

absolute min.

-14.6

-10.5

-10.5

-4.6

-2.2

-0.3

3.1

1.2

-1.0

-3.4

-7.2

-9.4

-14.6

mean no. of days with air frost

9.0

7.7

7.0

4.2

1.0

0.1

0.0

0.0

0.3

1.5

7.1

7.8

45.7

mean no. of days with ground frost

17.0

15.1

13.6

11.8

6.1

1.2

0.1

0.2

2.0

4.9

13.0

15.0

99.9

RELATIVE HUMIDITY (%)

mean at 0900UTC

90

89

87

82

77

78

80

84

86

89

90

90

85

mean at 1500UTC

83

76

71

65

64

66

67

68

71

76

80

84

73

SUNSHINE (hours)

mean daily duration

1.60

2.31

3.18

4.64

5.32

4.80

4.24

4.16

3.58

2.67

2.03

1.41

3.33

greatest daily duration

7.2

9.2

11.7

13.6

15.2

15.6

15.2

13.8

11.3

9.7

8.1

6.7

15.6

mean no. of days with no sun

11

7

5

3

2

2

3

2

4

6

9

12

66

RAINFALL (mm)

mean monthly total

76

53.9

60.7

52.8

61.2

55.6

58.7

78

70.6

84.1

74.2

78.3

804.1

greatest daily total

28.6

35.3

25.9

30.9

26.3

27.5

39.5

42.2

25.6

40.3

25.9

47.1

47.1

mean no. of days with >= 0.2mm

19

15

18

15

17

16

15

17

17

18

18

19

204

mean no. of days with >= 1.0mm

14

11

13

11

13

11

10

13

12

14

13

14

148

mean no. of days with >= 5.0mm

6

4

4

4

5

3

4

5

5

6

5

6

57

WIND (knots)

mean monthly speed

8.0

8.1

8.1

7.0

6.7

6.1

5.8

6.0

6.6

7.2

7.1

7.9

7.0

max. gust

85

77

62

58

55

49

49

58

81

65

60

69

85

max. mean 10-minute speed

51

40

36

34

31

28

27

35

39

40

34

43

51

mean no. of days with gales

0.4

0.4

0.1

0.0

0.0

0.0

0.0

0.0

0.0

0.1

0.0

0.2

1.2

WEATHER (mean no. of days with..)

snow or sleet

4.9

3.8

2.7

1.1

0.1

0.0

0.0

0.0

0.0

0.0

0.6

2.6

15.9

snow lying at 0900UTC

3.1

1.9

0.8

0.2

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.6

6.6

hail

0.6

0.9

2.6

1.8

1.1

0.3

0.0

0.2

0.2

0.2

0.5

0.3

8.7

thunder

0.1

0.1

0.3

0.3

0.6

1.1

1.0

0.7

0.5

0.2

0.2

0.1

5.2

fog

3.2

1.8

1.7

2.4

1.2

1.4

1.9

3.2

3.3

3.6

2.8

3.4

29.9

 

 
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