Historical Ranked Daily Data for Sep - Mean Dew Point / °C
Weather Variable:
| Highest | ||
| Rank | Value | Date |
| 1 | 19.0 | 06 Sep 2016 |
| 2 | 18.7 | 10 Sep 2023 |
| 3 | 18.6 | 08 Sep 2023 |
| 4 | 18.2 | 07 Sep 2023 |
| 5 | 18.2 | 09 Sep 2023 |
| 6 | 17.9 | 01 Sep 2024 |
| 7 | 17.7 | 02 Sep 2024 |
| 8 | 17.7 | 06 Sep 2023 |
| 9 | 17.5 | 11 Sep 2023 |
| 10 | 16.8 | 06 Sep 2024 |
| 11 | 16.6 | 09 Sep 2021 |
| 12 | 16.6 | 07 Sep 2016 |
| 13 | 16.4 | 15 Sep 2016 |
| 14 | 16.4 | 22 Sep 2024 |
| 15 | 16.4 | 05 Sep 2016 |
| 16 | 16.3 | 08 Sep 2020 |
| 17 | 16.3 | 05 Sep 2022 |
| 18 | 16.3 | 10 Sep 2021 |
| 19 | 16.3 | 19 Sep 2014 |
| 20 | 16.3 | 02 Sep 2023 |
| 21 | 16.3 | 13 Sep 2016 |
| 22 | 16.3 | 10 Sep 2016 |
| 23 | 16.3 | 12 Sep 2023 |
| 24 | 16.3 | 15 Sep 2020 |
| 25 | 16.2 | 05 Sep 2023 |
| Lowest | ||
| Rank | Value | Date |
| 1 | 3.4 | 19 Sep 2012 |
| 2 | 3.6 | 17 Sep 2022 |
| 3 | 3.8 | 25 Sep 2010 |
| 4 | 4.7 | 16 Sep 2013 |
| 5 | 4.7 | 22 Sep 2012 |
| 6 | 4.8 | 22 Sep 2025 |
| 7 | 5.1 | 17 Sep 2010 |
| 8 | 5.1 | 26 Sep 2020 |
| 9 | 5.4 | 24 Sep 2018 |
| 10 | 5.4 | 18 Sep 2010 |
| 11 | 5.6 | 25 Sep 2018 |
| 12 | 5.6 | 25 Sep 2025 |
| 13 | 5.7 | 18 Sep 2012 |
| 14 | 5.9 | 20 Sep 2012 |
| 15 | 5.9 | 28 Sep 2024 |
| 16 | 5.9 | 13 Sep 2024 |
| 17 | 6.0 | 29 Sep 2012 |
| 18 | 6.0 | 25 Sep 2020 |
| 19 | 6.0 | 23 Sep 2025 |
| 20 | 6.0 | 16 Sep 2022 |
| 21 | 6.3 | 13 Sep 2012 |
| 22 | 6.3 | 21 Sep 2025 |
| 23 | 6.4 | 29 Sep 2018 |
| 24 | 6.5 | 26 Sep 2015 |
| 25 | 6.5 | 28 Sep 2022 |
Ranked daily data from 2009 to present for London, NW3. For Mean Dew Point, there are 510 valid values in Sep.