Heliwr
Heliwr

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Year

Month

Temp : Max

Temp : Min

Rainfall (mm)

Sunshine (hrs)

1976

Jan

9

5.3

52.3

32.4

1976

Feb

7.7

3

40.3

66.6

1976

Mar

8.8

2.7

40.2

113.4

1976

Apr

11.7

5.4

37.1

198.5

1976

May

14.1

8.7

44.5

186.9

1976

Jun

18.5

11.6

16

204

1976

Jul

20.7

13.8

29.6

225.9

1976

Aug

22.4

12.8

10.7

294.2

1976

Sep

16.5

10.7

140.4

114.5

1976

Oct

13.7

8.6

129.2

79.8

1976

Nov

10.6

5.9

94.3

72

1976

Dec

6.9

2.1

57.1

57.2

1977

Jan

6.8

2.1

85.5

52.8

1977

Feb

8.3

3.7

161.2

57.9

1977

Mar

10

5.4

56.7

103.9

1977

Apr

10.2

5.4

58.4

172.8

1977

May

14.8

7.2

25.6

302.7

1977

Jun

16.1

9.4

73.7

247.2

1977

Jul

19.3

12.6

20.9

211.8

1977

Aug

19.2

12.3

55.3

213.4

1977

Sep

16

11.3

46.6

121.6

1977

Oct

15.8

10.7

122.2

115.8

1977

Nov

10

5.3

110

61.8

1977

Dec

9.5

5.3

104.7

44.9

1978

Jan

7.3

3.1

84.5

64.5

1978

Feb

6.6

1.9

75.5

69.1

1978

Mar

9.3

4.8

62.7

122.3

1978

Apr

10.6

3.9

37.1

179.8

1978

May

16.3

7.6

17.3

247.2

1978

Jun

16.3

10

47.1

169

1978

Jul

16.7

11.4

69.9

165.6

1978

Aug

16.8

12.1

70.2

134

1978

Sep

16.4

11.7

50.6

133.8

1978

Oct

15

10.8

37.4

95.1

1978

Nov

11.8

8.1

71.8

53.9

1978

Dec

8.3

3.5

131.3

54

1979

Jan

5.8

0.7

99.8

76.7

1979

Feb

5.3

0.8

42.5

75.1

1979

Mar

7.6

2.9

100.6

109

1979

Apr

10.3

4.9

47

171.1

1979

May

11.3

6.5

85.1

190.2

1979

Jun

16.3

10.5

13.1

215.5

1979

Jul

17.8

12.2

17.7

176.1

1979

Aug

17.2

11.8

90.8

183.7

1979

Sep

16.1

10.8

52.9

149.5

1979

Oct

14.9

9.7

101.6

104

1979

Nov

11.1

6.5

126.8

62

1979

Dec

9.3

5.2

155.5

48.7

1980

Jan

6.9

1.7

116

83.4

1980

Feb

8.9

4.3

111.7

38.9

1980

Mar

8.3

3.2

89.3

118.9

1980

Apr

12.7

5.5

7

207.4

1980

May

16.3

7.4

29.8

303.3

1980

Jun

16.1

10.5

67.3

161.2

1980

Jul

17.7

11.9

29.9

191.8

1980

Aug

17.8

12.8

99.1

129.7

1980

Sep

17

12.7

71.4

118.5

1980

Oct

12.7

7.8

109.3

97

1980

Nov

10.3

5.7

95.3

55.7

1980

Dec

9.5

4.8

77.6

45.5

1981

Jan

8.5

4

51.6

41.1

1981

Feb

7.3

2

31.1

89

1981

Mar

10.1

5.7

151.9

94.6

1981

Apr

12.4

5.1

65.9

185.5

1981

May

14.3

8.2

55

176.7

1981

Jun

15.2

10.1

51.4

169.3

1981

Jul

16.9

12.1

40.6

143.3

1981

Aug

18.9

12.6

26

182.7

1981

Sep

17.6

12.2

101.6

137.3

1981

Oct

12

6.6

172.2

105.4

1981

Nov

11.3

6.6

76.8

43.3

1981

Dec

5.8

0.3

77.6

51

1982

Jan

7.3

2

41.6

70.7

1982

Feb

8.8

3.6

54

76.2

1982

Mar

9.6

3.9

71.4

153.3

1982

Apr

12.2

5.3

22.2

189.1

1982

May

15.4

8

35.9

229.2

1982

Jun

18.4

11.4

56.9

182.6

1982

Jul

20.1

12.4

30.6

209.9

1982

Aug

18.5

12.4

66.9

164.5

1982

Sep

17.3

11.3

102.8

122.1

1982

Oct

14

8.9

99.8

71.5

1982

Nov

11.3

6.9

169.2

45.8

1982

Dec

8.6

3.5

84.5

35.7

1983

Jan

9.2

5.3

81

24.5

1983

Feb

6.6

0.4

41

99

1983

Mar

9.1

4.9

84.3

81.8

1983

Apr

10.3

3.9

61.9

165.7

1983

May

13.5

7.7

77.5

165

1983

Jun

17

10.4

26.2

183.2

1983

Jul

22.2

13

9.3

238

1983

Aug

20.8

12.8

78.7

226

1983

Sep

16.8

11.3

113.5

112.3

1983

Oct

13.9

9.1

64.7

94.4

1983

Nov

11.4

6.5

26.9

49.3

1983

Dec

9.9

5.4

140.2

41.5

1984

Jan

7.7

2.8

116.5

63.7

1984

Feb

7.8

2.4

47.7

74.7

1984

Mar

8.2

3.1

40.8

95.6

1984

Apr

12.9

5.2

13.8

201.3

1984

May

14.5

5.9

29.7

266.9

1984

Jun

17.6

10.2

41.2

188.2

1984

Jul

20.1

12

31

299.6

1984

Aug

21.5

13.5

68.9

247.1

1984

Sep

16.4

11.3

142.8

124.1

1984

Oct

14.2

9.8

110.7

103.2

1984

Nov

10.9

6.7

145.4

56.7

1984

Dec

9.5

4.9

108

56.6

1985

Jan

5.6

-0.4

57.1

70.6

1985

Feb

6.9

1.3

55.2

105.7

1985

Mar

8.5

2.8

44.7

150.3

1985

Apr

11.2

5.6

73.3

137.6

1985

May

14

7.8

60.8

189.6

1985

Jun

15.8

9.2

67.8

199

1985

Jul

17.9

12.5

68.4

182.9

1985

Aug

16.6

11.8

141

153.5

1985

Sep

17.2

12.3

43.7

117.9

1985

Oct

14.2

8.6

39.5

103.1

1985

Nov

8.6

3.4

107.6

69.1

1985

Dec

9.3

5

110.9

45.5

Anglesey Weather 1975 - 1986
(RAF Valley)
(With many thanks to Mr Emlyn Roberts for his valuable advice)