Historical Ranked Spells - Maximum Temperature · Above 20.0 °C
Longest Above 20.0 °C
#
Length
Period
1
85 days
9 Jun 2025 – 1 Sep 2025
2
69 days
1 Jul 2022 – 7 Sep 2022
3
52 days
3 Jul 2013 – 23 Aug 2013
4
52 days
12 Jun 2026 – Current
5
44 days
21 Jun 2010 – 3 Aug 2010
6
41 days
18 Jun 2018 – 28 Jul 2018
7
39 days
14 Jul 2024 – 21 Aug 2024
8
31 days
30 Jul 2012 – 29 Aug 2012
9
31 days
12 Jul 2014 – 11 Aug 2014
10
31 days
23 Jun 2015 – 23 Jul 2015
11
29 days
16 Jul 2020 – 13 Aug 2020
12
28 days
21 Jun 2019 – 18 Jul 2019
13
23 days
20 Jul 2019 – 11 Aug 2019
14
23 days
7 Jun 2023 – 29 Jun 2023
15
19 days
9 Jun 2017 – 27 Jun 2017
16
19 days
11 Jul 2021 – 29 Jul 2021
17
18 days
17 Aug 2019 – 3 Sep 2019
18
17 days
9 Aug 2023 – 25 Aug 2023
19
16 days
21 Jun 2009 – 6 Jul 2009
20
16 days
16 Jul 2016 – 31 Jul 2016
21
15 days
20 Aug 2016 – 3 Sep 2016
22
15 days
21 May 2017 – 4 Jun 2017
23
15 days
16 Jun 2024 – 30 Jun 2024
24
14 days
20 May 2026 – 2 Jun 2026
25
13 days
8 Aug 2009 – 20 Aug 2009
Current matching spell: 52 days (since 12 Jun 2026)
Longest consecutive-day spells from 2009 to present for London, NW3. Rule: Maximum Temperature ≥ 20.0 °C.
Found 302 matching spells. Showing top 25. Data for Maximum Temperature begins in 1881.
Highest air temperature recorded during the day (midnight to midnight, local time).