Historical Ranked Periods - Maximum Feels-like / °C · 5-day mean
Start year
Top 5-day mean
#
Value
Date
1
41.1
23–27 Jun 2026
2
40.4
8–12 Aug 2020
3
38.9
6–10 Sep 2023
4
37.8
18–22 Jul 2021
5
37.4
22–26 Jul 2019
6
37.2
6–10 Jul 2026
7
37.0
27 Jun – 1 Jul 2025
8
36.6
24–28 May 2026
9
36.5
23–27 Jul 2018
10
36.2
17–21 Jun 2017
11
36.1
16–20 Jul 2022
12
35.6
10–14 Aug 2022
13
35.0
29 Jul – 2 Aug 2024
14
34.9
23–27 Aug 2019
15
34.3
10–14 Aug 2024
16
34.3
11–15 Aug 2025
17
34.2
2–6 Aug 2018
18
34.0
9–13 Jul 2025
19
33.9
17–21 Jun 2025
20
33.9
10–14 Jun 2023
21
33.8
18–22 Jun 2026
22
33.7
5–9 Jul 2018
23
33.6
9–13 Jul 2022
24
33.6
11–15 Jul 2026
25
33.5
22–26 Jun 2020
Bottom 5-day mean
#
Value
Date
1
-3.3
26 Feb – 2 Mar 2018
2
-1.3
8–12 Feb 2021
3
-0.7
29 Nov – 3 Dec 2010
4
-0.4
5–9 Jan 2010
5
-0.3
22–26 Mar 2013
6
-0.1
21–25 Feb 2013
7
-0.0
13–17 Oct 2009
8
0.2
16–20 Jan 2013
9
0.2
31 Jan – 4 Feb 2012
10
0.2
17–21 Dec 2010
11
0.3
11–15 Dec 2022
12
0.5
22–26 Dec 2010
13
1.0
18–22 Dec 2009
14
1.2
2–6 Jan 2026
15
1.4
7–11 Feb 2012
16
1.4
10–14 Jan 2010
17
1.5
15–19 Jan 2024
18
1.5
21–25 Jan 2013
19
1.6
10–14 Mar 2013
20
1.9
2–6 Feb 2015
21
2.0
8–12 Dec 2017
22
2.0
27–31 Jan 2011
23
2.1
24–28 Nov 2010
24
2.1
5–9 Dec 2010
25
2.2
8–12 Feb 2010
Maximum Feels-like 5-day extremes: highest and lowest period means.
There are 6206 valid 5-day periods from 2009 to present in London, NW3 (complete windows only, hiding overlapping windows). Data for Maximum Feels-like begins in 2009.
Highest feels-like temperature (humidex) during the day (midnight to midnight, local time). This accounts for high humidity as well as temperature.