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Monthly Data Tables - Maximum Rain Rate / mm/h

Total Max hour Max 10-min Max rate Mean rate Wet hours Wet % of day

Monthly

Mean Lowest Highest

Start year

1871 1910 1950 1980 2000 2009 2020

Monthly Mean Maximum Rain Rate

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Year

11

13

16

13

17

10

19

12

13

17

21

19

20

13

16

13

14

13

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Year

Lowest

4.3

1.9

2.8

1.0

4.5

7

7

4.5

8

3.0

3.8

3.2

10

Highest

25

23

18

23

54

36

38

65

46

53

21

26

21

Mean

12

9

9

10

19

20

20

25

21

18

11

10

15

Maximum Rain Rate: monthly means for all months since 2009 in London, NW3. Data for Maximum Rain Rate begins in 2009.

Monthly Lowest Maximum Rain Rate

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Year

0.3

0.2

0.3

0.3

0

0.3

0.3

0.2

0.3

0.4

0.2

0.3

0.2

0.3

0.4

0.5

0.4

0.3

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Year

Lowest

0.3

0.3

0.3

0.2

0.3

0.2

0.2

0.3

0

0.2

0.3

0

0

Highest

2.0

2.1

15

5

54

11

4.4

7

7

18

1.3

2.1

0.5

Mean

0.8

0.8

1.9

1.6

4.7

1.8

1.3

1.7

2.0

2.1

0.5

0.6

0.3

Maximum Rain Rate: lowest daily value each month for all months since 2009 in London, NW3. Data for Maximum Rain Rate begins in 2009.

Monthly Highest Maximum Rain Rate

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Year

84

108

100

120

114

102

102

92

119

100

162

126

126

108

120

100

65

96

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Year

Lowest

14

3.6

3.0

1.0

14

14

13

11

24

3.3

7

8

65

Highest

120

162

53

54

100

120

126

119

126

120

114

126

162

Mean

42

37

26

27

50

67

57

72

62

59

42

36

108

Maximum Rain Rate: highest daily value each month for all months since 2009 in London, NW3. Data for Maximum Rain Rate begins in 2009.