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Monthly Data Tables - Rainfall / mm

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

Monthly

Total Count Lowest Highest

Start year

1871 1910 1950 1980 2000 2009 2020

Monthly Total Rainfall

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Year

103.2
(175%)

96.6
(215%)

28.3
(73%)

2.3
(5%)

11.4
(25%)

101.2
(215%)

0.0
(0%)

343.0
(56%)

88.5
(150%)

49.0
(109%)

3.8
(10%)

25.7
(61%)

49.6
(108%)

28.4
(60%)

62.2
(135%)

25.0
(46%)

50.3
(101%)

71.7
(110%)

62.7
(94%)

60.4
(106%)

577.3
(94%)

54.0
(92%)

87.1
(194%)

73.6
(189%)

67.8
(161%)

74.1
(161%)

10.4
(22%)

98.4
(214%)

29.0
(54%)

120.1
(240%)

64.6
(99%)

73.1
(109%)

43.0
(75%)

795.2
(129%)

52.8
(89%)

3.9
(9%)

83.1
(213%)

49.2
(117%)

25.2
(55%)

29.9
(64%)

70.6
(153%)

45.2
(84%)

48.5
(97%)

94.2
(145%)

70.1
(105%)

74.4
(131%)

647.1
(105%)

16.8
(28%)

52.4
(116%)

27.4
(70%)

18.0
(43%)

28.4
(62%)

27.8
(59%)

2.3
(5%)

71.5
(132%)

55.2
(110%)

72.3
(111%)

135.4
(202%)

58.1
(102%)

565.6
(92%)

97.7
(166%)

40.1
(89%)

21.5
(55%)

2.8
(7%)

73.8
(160%)

65.4
(139%)

123.3
(268%)

34.5
(64%)

40.5
(81%)

96.8
(149%)

8.0
(12%)

72.0
(126%)

676.4
(110%)

45.1
(76%)

90.5
(201%)

39.4
(101%)

28.3
(67%)

5.5
(12%)

45.1
(96%)

36.4
(79%)

51.7
(96%)

23.4
(47%)

165.8
(255%)

32.4
(48%)

76.8
(135%)

640.4
(104%)

31.3
(53%)

40.3
(90%)

48.4
(124%)

12.4
(30%)

31.8
(69%)

59.1
(126%)

43.5
(95%)

36.9
(68%)

68.1
(136%)

91.2
(140%)

62.4
(93%)

92.6
(162%)

618.0
(100%)

72.0
(122%)

38.9
(86%)

73.6
(189%)

58.5
(139%)

38.7
(84%)

0.8
(2%)

36.4
(79%)

71.0
(131%)

28.6
(57%)

36.3
(56%)

66.2
(99%)

61.5
(108%)

582.5
(94%)

68.7
(116%)

33.9
(75%)

30.4
(78%)

2.9
(7%)

85.9
(187%)

52.1
(111%)

89.0
(193%)

86.4
(160%)

64.1
(128%)

19.4
(30%)

38.2
(57%)

97.3
(171%)

668.3
(108%)

71.3
(121%)

38.6
(86%)

63.3
(162%)

50.5
(120%)

43.4
(94%)

91.8
(195%)

22.3
(48%)

18.1
(34%)

38.7
(77%)

38.7
(60%)

82.4
(123%)

10.5
(18%)

569.6
(92%)

75.7
(128%)

44.3
(98%)

22.3
(57%)

19.5
(46%)

52.1
(113%)

9.4
(20%)

58.5
(127%)

77.9
(144%)

63.9
(128%)

51.9
(80%)

66.0
(99%)

52.2
(92%)

593.7
(96%)

141.5
(240%)

78.9
(175%)

22.9
(59%)

23.2
(55%)

70.3
(153%)

28.9
(61%)

47.1
(102%)

118.3
(219%)

42.6
(85%)

94.2
(145%)

106.1
(158%)

41.2
(72%)

815.2
(132%)

47.0
(80%)

37.1
(82%)

54.2
(139%)

31.7
(75%)

49.1
(107%)

15.6
(33%)

36.2
(79%)

51.3
(95%)

61.3
(123%)

92.0
(142%)

55.6
(83%)

91.0
(160%)

622.1
(101%)

42.8
(73%)

20.5
(46%)

21.6
(55%)

100.4
(239%)

44.6
(97%)

117.7
(250%)

89.0
(193%)

31.7
(59%)

43.4
(87%)

89.0
(137%)

75.1
(112%)

101.4
(178%)

777.2
(126%)

73.0
(124%)

44.2
(98%)

11.1
(28%)

1.8
(4%)

24.1
(52%)

87.6
(186%)

53.2
(116%)

73.0
(135%)

42.1
(84%)

15.5
(24%)

25.2
(38%)

56.2
(99%)

507.0
(82%)

56.1
(95%)

99.3
(221%)

33.4
(86%)

21.5
(51%)

68.8
(150%)

22.2
(47%)

15.1
(33%)

98.5
(182%)

42.6
(85%)

77.4
(119%)

32.4
(48%)

26.7
(47%)

594.0
(96%)

71.1
(121%)

63.8
(142%)

32.4
(83%)

33.1
(79%)

26.3
(57%)

70.6
(150%)

55.4
(120%)

42.1
(78%)

35.9
(72%)

28.9
(44%)

144.2
(215%)

76.5
(134%)

680.3
(110%)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Year

Lowest

16.8
(28%)

3.9
(9%)

3.8
(10%)

1.8
(4%)

5.5
(12%)

0.8
(2%)

0.0
(0%)

18.1
(34%)

23.4
(47%)

15.5
(24%)

8.0
(12%)

10.5
(18%)

343.0
(56%)

Highest

141.5
(240%)

99.3
(221%)

83.1
(213%)

100.4
(239%)

85.9
(187%)

117.7
(250%)

123.3
(268%)

118.3
(219%)

120.1
(240%)

165.8
(255%)

144.2
(215%)

101.4
(178%)

815.2
(132%)

Mean

67.1
(114%)

53.3
(118%)

38.4
(98%)

30.5
(73%)

44.6
(97%)

48.0
(102%)

52.2
(113%)

56.6
(105%)

51.1
(102%)

70.6
(109%)

66.8
(100%)

64.2
(113%)

626.3
(102%)

Rainfall: monthly totals for all months since 2009 in London, NW3. Data for Rainfall begins in 1871.

Monthly Count Rainfall

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Year

80

121

171

159

148

159

172

174

145

145

161

172

185

168

178

159

165

179

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Year

Lowest

7

5

4

3

2

4

0

4

5

8

9

8

80

Highest

30

25

23

22

18

21

20

18

18

25

26

24

185

Mean

17.1

15.8

12.4

10.4

11.2

11.7

11.6

12.2

10.6

15.5

16.2

17.2

157.8

Rainfall: count of days with a non-zero value for all months since 2009 in London, NW3. Data for Rainfall begins in 1871.

Monthly Lowest Rainfall

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Year

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Year

Lowest

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

Highest

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

Mean

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

Rainfall: lowest daily value each month for all months since 2009 in London, NW3. Data for Rainfall begins in 1871.

Monthly Highest Rainfall

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Year

33.6

35.8

27.3

21.4

35.8

42.0

34.0

32.0

19.1

39.1

30.4

31.9

40.7

32.0

25.7

21.7

31.7

35.8

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Year

Lowest

7.0

2.9

2.0

1.0

3.8

0.2

0.0

7.7

5.3

3.6

3.8

6.1

19.1

Highest

31.0

27.0

16.0

21.1

35.6

35.8

42.0

39.1

32.0

40.7

29.8

21.7

42.0

Mean

14.4

12.6

9.7

9.0

15.6

15.7

16.3

20.3

20.5

17.7

14.9

13.6

31.7

Rainfall: highest daily value each month for all months since 2009 in London, NW3. Data for Rainfall begins in 1871.

Figures in brackets refer to departure from recent average conditions (the anomaly for the current month is unadjusted for the month's degree of completeness).