Historical Ranked Periods - Minimum Temperature / °C · 5-day mean
Top 5-day mean
#
Value
Date
1
20.2
23–27 Jun 2026
2
19.5
6–10 Jul 2026
3
19.3
8–12 Aug 2020
4
18.5
28 Jun – 2 Jul 2025
5
18.4
23–27 Jul 2018
6
18.2
22–26 Jul 2019
7
18.1
31 Jul – 4 Aug 2022
8
18.0
7–11 Sep 2023
9
18.0
14–18 Aug 2012
10
17.9
6–10 Jul 2017
11
17.9
18–22 Jun 2017
12
17.7
17–21 Jul 2014
13
17.7
19–23 Jul 2022
14
17.7
12–16 Aug 2022
15
17.4
17–21 Jul 2025
16
17.4
16–20 Jul 2016
17
17.3
30 Jul – 3 Aug 2024
18
17.2
24–28 Aug 2016
19
17.2
21–25 Jul 2013
20
17.1
17–21 Jun 2026
21
17.1
18–22 Aug 2018
22
16.9
29 Jun – 3 Jul 2010
23
16.9
8–12 Jul 2010
24
16.8
26–30 Jul 2026
25
16.8
12–16 Aug 2025
Bottom 5-day mean
#
Value
Date
1
-5.4
16–20 Dec 2010
2
-4.7
8–12 Feb 2012
3
-4.3
4–8 Jan 2010
4
-4.0
3–7 Jan 2009
5
-3.8
26 Feb – 2 Mar 2018
6
-3.8
13–17 Dec 2022
7
-3.2
19–23 Dec 2009
8
-3.2
31 Jan – 4 Feb 2012
9
-3.1
15–19 Jan 2024
10
-2.9
21–25 Jan 2023
11
-2.9
14–18 Jan 2013
12
-2.8
9–13 Feb 2021
13
-2.6
26–30 Nov 2010
14
-2.6
7–11 Dec 2022
15
-2.6
8–12 Jan 2025
16
-2.5
5–9 Dec 2010
17
-2.4
2–6 Jan 2026
18
-2.4
16–20 Jan 2023
19
-2.3
4–8 Mar 2010
20
-2.2
18–22 Jan 2017
21
-2.1
19–23 Jan 2015
22
-2.1
1–5 Feb 2009
23
-2.0
21–25 Jan 2013
24
-1.9
22–26 Dec 2010
25
-1.9
29 Nov – 3 Dec 2023
Minimum Temperature 5-day extremes: highest and lowest period means.
There are 6419 valid 5-day periods from 2009 to present in London, NW3 (complete windows only, hiding overlapping windows). Data for Minimum Temperature begins in 1881.
Lowest air temperature recorded during the day (midnight to midnight, local time).