Historical Ranked Spells - Night Minimum (21-09) · Above 20.0 °C
Longest Above 20.0 °C
#
Length
Period
1
5 days
24 Jun 2026 – 28 Jun 2026
2
3 days
11 Aug 2020 – 13 Aug 2020
3
2 days
9 Jul 2026 – 10 Jul 2026
4
1 day
18 Aug 2012 – 18 Aug 2012
5
1 day
20 Jul 2016 – 20 Jul 2016
6
1 day
22 Jun 2017 – 22 Jun 2017
7
1 day
8 Aug 2020 – 8 Aug 2020
8
1 day
13 Jul 2022 – 13 Jul 2022
9
1 day
19 Jul 2022 – 19 Jul 2022
10
1 day
1 Jul 2025 – 1 Jul 2025
Longest consecutive-day spells from 2009 to present for London, NW3. Rule: Night Minimum (21-09) ≥ 20.0 °C.
Found 10 matching spells. Showing top 10. Data for Night Minimum (21-09) begins in 1881.
Lowest air temperature overnight, from 21:00 to 09:00 local time.