Historical Ranked Daily Data for Sep - Mean Temperature / °C
Weather Variable:
| Highest | ||
| Rank | Value | Date |
| 1 | 24.9 | 09 Sep 2023 |
| 2 | 24.8 | 13 Sep 2016 |
| 3 | 23.6 | 07 Sep 2023 |
| 4 | 23.4 | 10 Sep 2023 |
| 5 | 23.2 | 08 Sep 2023 |
| 6 | 23.1 | 14 Sep 2016 |
| 7 | 22.6 | 06 Sep 2023 |
| 8 | 22.6 | 07 Sep 2016 |
| 9 | 22.1 | 15 Sep 2016 |
| 10 | 21.9 | 15 Sep 2020 |
| 11 | 21.7 | 11 Sep 2023 |
| 12 | 21.6 | 08 Sep 2021 |
| 13 | 21.5 | 05 Sep 2023 |
| 14 | 21.4 | 07 Sep 2021 |
| 15 | 21.3 | 06 Sep 2016 |
| 16 | 21.1 | 01 Sep 2024 |
| 17 | 21.1 | 05 Sep 2013 |
| 18 | 21.1 | 04 Sep 2023 |
| 19 | 20.7 | 08 Sep 2009 |
| 20 | 20.4 | 16 Sep 2020 |
| 21 | 20.3 | 12 Sep 2022 |
| 22 | 20.3 | 17 Sep 2018 |
| 23 | 20.0 | 19 Sep 2025 |
| 24 | 19.9 | 04 Sep 2022 |
| 25 | 19.9 | 07 Sep 2025 |
| Lowest | ||
| Rank | Value | Date |
| 1 | 9.0 | 26 Sep 2020 |
| 2 | 9.2 | 28 Sep 2024 |
| 3 | 9.4 | 28 Sep 2022 |
| 4 | 9.5 | 25 Sep 2010 |
| 5 | 9.8 | 29 Sep 2024 |
| 6 | 10.0 | 12 Sep 2024 |
| 7 | 10.1 | 23 Sep 2012 |
| 8 | 10.2 | 25 Sep 2020 |
| 9 | 10.3 | 29 Sep 2022 |
| 10 | 10.4 | 27 Sep 2022 |
| 11 | 10.4 | 27 Sep 2024 |
| 12 | 10.4 | 26 Sep 2010 |
| 13 | 10.4 | 23 Sep 2018 |
| 14 | 10.6 | 24 Sep 2018 |
| 15 | 10.7 | 11 Sep 2024 |
| 16 | 10.9 | 19 Sep 2017 |
| 17 | 10.9 | 13 Sep 2024 |
| 18 | 11.0 | 17 Sep 2022 |
| 19 | 11.0 | 23 Sep 2025 |
| 20 | 11.1 | 22 Sep 2012 |
| 21 | 11.1 | 14 Sep 2013 |
| 22 | 11.1 | 09 Sep 2013 |
| 23 | 11.1 | 17 Sep 2013 |
| 24 | 11.2 | 16 Sep 2013 |
| 25 | 11.2 | 22 Sep 2025 |
Ranked daily data from 2009 to present for London, NW3. For Mean Temperature, there are 510 valid values in Sep.