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Estimated 1951-2000 Averages

I spent a while deliberating over whether to use 1961-1990 or 1971-2000 as the main reference period to compare my monthly totals and averages with. In the end, Ive decided to opt for neither of those, and have gone with 1951-2000. Why? Well, those 30-year averaging periods are influenced more heavily by short-term variability. For example, during 1971-2000 June was anomalously cool and cloudy relative to surrounding months, while during 1981-2010, December was anomalously cool (as the period was flanked by the exceptionally cold Decembers of 1981 and 2010). A longer-term average drowns out most of that short-term variability. Generally speaking, 1951-2000 averages show closer accordance with 1961-1990 than 1971-2000 as the warmth of the 1990s is offset by the relatively cool 1950s.

 

The averages have been estimated by regression against Durham University Observatorys values and by checking against the Met Offices mapped climatological averages.

 

Month

Max temp

Min temp

Mean temp

Precip (mm)

Air frosts

Thunder

Sleet or snow

Snow lying

Hail

Mean SLP

Jan

6.3

1.2

3.8

57

10

0

8

4

1

1011

Feb

6.6

1.3

4.0

43

9

0

7

3

1

1013

Mar

8.8

2.7

5.7

45

6

0

6

2

2

1013

Apr

11.1

4.1

7.6

48

3

0

2

0

2

1014

May

14.0

6.7

10.4

52

0

1

0

0

1

1015

June

17.0

9.6

13.3

52

0

2

0

0

0

1015

July

19.0

11.6

15.4

50

0

2

0

0

0

1015

Aug

18.8

11.5

15.2

67

0

2

0

0

0

1015

Sep

16.5

9.7

13.1

55

0

1

0

0

0

1014

Oct

13.2

7.1

10.1

56

1

0

0

0

0

1012

Nov

9.2

3.9

6.5

66

4

0

3

1

1

1010

Dec

7.1

2.1

4.6

55

8

0

6

2

1

1010

Win

6.7

1.5

4.1

155

27

0

21

9

3

1011.3

Spr

11.3

4.5

7.9

145

9

2

8

2

5

1014.0

Sum

18.3

11.0

14.6

169

0

4

0

0

1

1015.0

Aut

13.0

6.9

9.9

177

5

2

3

1

2

1012.0

Annual

12.3

6.0

9.1

646

41

8

32

12

10

1013.1