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Template:London weatherbox

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Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °C (°F) 17.2
(63.0)
21.2
(70.2)
24.5
(76.1)
29.4
(84.9)
32.8
(91.0)
35.6
(96.1)
40.2
(104.4)
38.1
(100.6)
35.0
(95.0)
29.5
(85.1)
21.1
(70.0)
17.4
(63.3)
40.2
(104.4)
Mean daily maximum °C (°F) 8.4
(47.1)
9.0
(48.2)
11.7
(53.1)
15.0
(59.0)
18.4
(65.1)
21.6
(70.9)
23.9
(75.0)
23.4
(74.1)
20.2
(68.4)
15.8
(60.4)
11.5
(52.7)
8.8
(47.8)
15.7
(60.3)
Daily mean °C (°F) 5.6
(42.1)
5.8
(42.4)
7.9
(46.2)
10.5
(50.9)
13.7
(56.7)
16.8
(62.2)
19.0
(66.2)
18.7
(65.7)
15.9
(60.6)
12.3
(54.1)
8.4
(47.1)
5.9
(42.6)
11.7
(53.1)
Mean daily minimum °C (°F) 2.7
(36.9)
2.7
(36.9)
4.1
(39.4)
6.0
(42.8)
9.1
(48.4)
12.0
(53.6)
14.2
(57.6)
14.1
(57.4)
11.6
(52.9)
8.8
(47.8)
5.3
(41.5)
3.1
(37.6)
7.8
(46.0)
Record low °C (°F) −16.1
(3.0)
−13.9
(7.0)
−8.9
(16.0)
−5.6
(21.9)
−3.1
(26.4)
−0.6
(30.9)
3.9
(39.0)
2.1
(35.8)
1.4
(34.5)
−5.5
(22.1)
−7.1
(19.2)
−17.4
(0.7)
−17.4
(0.7)
Average precipitation mm (inches) 58.8
(2.31)
45.0
(1.77)
38.8
(1.53)
42.3
(1.67)
45.9
(1.81)
47.3
(1.86)
45.8
(1.80)
52.8
(2.08)
49.6
(1.95)
65.1
(2.56)
66.6
(2.62)
57.1
(2.25)
615.0
(24.21)
Average precipitation days (≥ 1.0 mm) 11.5 9.5 8.5 8.8 8.0 8.3 7.9 8.4 7.9 10.8 11.2 10.8 111.7
Average relative humidity (%) 80 77 70 65 67 65 65 69 73 78 81 81 73
Average dew point °C (°F) 3
(37)
2
(36)
2
(36)
4
(39)
7
(45)
10
(50)
12
(54)
12
(54)
10
(50)
9
(48)
6
(43)
3
(37)
7
(44)
Mean monthly sunshine hours 61.1 78.8 124.5 176.7 207.5 208.4 217.8 202.1 157.1 115.2 70.7 55.0 1,674.8
Percent possible sunshine 23 28 31 40 41 41 42 45 40 35 27 21 35
Average ultraviolet index 1 1 2 4 5 6 6 5 4 2 1 0 3
Source 1: Met Office[1][2][3] Royal Netherlands Meteorological Institute[4][5]
Source 2: Weather Atlas (percent sunshine and UV Index)[6] CEDA Archive[7] TORRO[8] Time and Date[9]

See Climate of London for additional climate information.

  1. ^ Averages are taken from Heathrow, and extremes are taken from stations across London.

References

  1. ^ "London Heathrow Airport". Met Office. Retrieved 17 December 2021.
  2. ^ "Station Data". Met Office. Retrieved 8 May 2020.
  3. ^ "UK Climate Extremes". Met Office. Retrieved 3 July 2021.
  4. ^ "Heathrow Airport Extreme Values". KNMI. Retrieved 29 November 2015.
  5. ^ "Heathrow 1981–2010 mean maximum and minimum values". KNMI. Retrieved 28 December 2017.
  6. ^ "London, United Kingdom – Climate data". Weather Atlas. Retrieved 11 March 2020.
  7. ^ "MIDAS Open: UK daily temperature data, v202007". CEDA Archive. Retrieved 3 July 2021.
  8. ^ "Maximum temperature date records". TORRO. Retrieved 3 July 2021.
  9. ^ "Climate & Weather Averages in London, England, United Kingdom". Time and Date. Retrieved 9 January 2022.