Historical Ranked Daily Data for Sep - Maximum Dew Point / °C
Weather Variable:
| Highest | ||
| Rank | Value | Date |
| 1 | 22.2 | 10 Sep 2023 |
| 2 | 21.7 | 08 Sep 2023 |
| 3 | 21.6 | 06 Sep 2023 |
| 4 | 21.1 | 01 Sep 2024 |
| 5 | 21.1 | 09 Sep 2023 |
| 6 | 20.1 | 07 Sep 2023 |
| 7 | 19.8 | 05 Sep 2016 |
| 8 | 19.7 | 06 Sep 2016 |
| 9 | 19.4 | 15 Sep 2020 |
| 10 | 19.3 | 05 Sep 2013 |
| 11 | 19.1 | 05 Sep 2023 |
| 12 | 19.0 | 06 Sep 2021 |
| 13 | 19.0 | 19 Sep 2014 |
| 14 | 18.9 | 08 Sep 2020 |
| 15 | 18.9 | 07 Sep 2016 |
| 16 | 18.7 | 07 Sep 2021 |
| 17 | 18.6 | 02 Sep 2024 |
| 18 | 18.6 | 03 Sep 2023 |
| 19 | 18.6 | 04 Sep 2017 |
| 20 | 18.6 | 15 Sep 2016 |
| 21 | 18.6 | 10 Sep 2011 |
| 22 | 18.5 | 06 Sep 2024 |
| 23 | 18.5 | 09 Sep 2021 |
| 24 | 18.4 | 05 Sep 2024 |
| 25 | 18.4 | 05 Sep 2021 |
| Lowest | ||
| Rank | Value | Date |
| 1 | 5.0 | 17 Sep 2022 |
| 2 | 6.0 | 25 Sep 2010 |
| 3 | 6.2 | 19 Sep 2012 |
| 4 | 6.8 | 24 Sep 2018 |
| 5 | 7.3 | 25 Sep 2020 |
| 6 | 7.5 | 18 Sep 2010 |
| 7 | 7.5 | 25 Sep 2018 |
| 8 | 7.7 | 22 Sep 2025 |
| 9 | 7.8 | 26 Sep 2020 |
| 10 | 8.0 | 16 Sep 2022 |
| 11 | 8.2 | 22 Sep 2012 |
| 12 | 8.2 | 29 Sep 2018 |
| 13 | 8.3 | 20 Sep 2012 |
| 14 | 8.3 | 28 Sep 2022 |
| 15 | 8.4 | 17 Sep 2010 |
| 16 | 8.4 | 28 Sep 2024 |
| 17 | 8.4 | 21 Sep 2025 |
| 18 | 8.4 | 25 Sep 2025 |
| 19 | 8.6 | 13 Sep 2024 |
| 20 | 8.7 | 05 Sep 2012 |
| 21 | 8.7 | 23 Sep 2018 |
| 22 | 8.8 | 30 Sep 2018 |
| 23 | 8.9 | 08 Sep 2019 |
| 24 | 8.9 | 27 Sep 2020 |
| 25 | 9.0 | 13 Sep 2012 |
Ranked daily data from 2009 to present for London, NW3. For Maximum Dew Point, there are 510 valid values in Sep.