Historical Ranked Daily Data for Sep - Max 1hr Temp Rise / °C
Weather Variable:
| Highest | ||
| Rank | Value | Date |
| 1 | 5.6 | 09 Sep 2025 |
| 2 | 4.9 | 08 Sep 2012 |
| 3 | 4.8 | 15 Sep 2011 |
| 4 | 4.7 | 09 Sep 2012 |
| 5 | 4.7 | 06 Sep 2012 |
| 6 | 4.6 | 19 Sep 2019 |
| 7 | 4.5 | 08 Sep 2013 |
| 8 | 4.5 | 01 Sep 2010 |
| 9 | 4.4 | 30 Sep 2025 |
| 10 | 4.2 | 14 Sep 2024 |
| 11 | 4.2 | 09 Sep 2023 |
| 12 | 4.2 | 01 Sep 2020 |
| 13 | 4.0 | 04 Sep 2023 |
| 14 | 4.0 | 14 Sep 2019 |
| 15 | 4.0 | 24 Sep 2011 |
| 16 | 3.9 | 29 Sep 2025 |
| 17 | 3.9 | 18 Sep 2019 |
| 18 | 3.9 | 13 Sep 2018 |
| 19 | 3.8 | 16 Sep 2023 |
| 20 | 3.8 | 03 Sep 2018 |
| 21 | 3.8 | 23 Sep 2016 |
| 22 | 3.8 | 03 Sep 2013 |
| 23 | 3.8 | 13 Sep 2012 |
| 24 | 3.7 | 14 Sep 2020 |
| 25 | 3.7 | 11 Sep 2016 |
| Lowest | ||
| Rank | Value | Date |
| 1 | 0.4 | 25 Sep 2021 |
| 2 | 0.5 | 21 Sep 2015 |
| 3 | 0.6 | 10 Sep 2016 |
| 4 | 0.6 | 14 Sep 2021 |
| 5 | 0.7 | 14 Sep 2010 |
| 6 | 0.7 | 25 Sep 2017 |
| 7 | 0.7 | 22 Sep 2018 |
| 8 | 0.7 | 02 Sep 2024 |
| 9 | 0.7 | 30 Sep 2024 |
| 10 | 0.7 | 18 Sep 2025 |
| 11 | 0.8 | 06 Sep 2011 |
| 12 | 0.8 | 06 Sep 2013 |
| 13 | 0.8 | 13 Sep 2013 |
| 14 | 0.8 | 14 Sep 2013 |
| 15 | 0.8 | 20 Sep 2014 |
| 16 | 0.8 | 17 Sep 2016 |
| 17 | 0.8 | 29 Sep 2019 |
| 18 | 0.9 | 16 Sep 2010 |
| 19 | 0.9 | 20 Sep 2011 |
| 20 | 0.9 | 16 Sep 2012 |
| 21 | 0.9 | 22 Sep 2013 |
| 22 | 1.0 | 24 Sep 2010 |
| 23 | 1.0 | 29 Sep 2010 |
| 24 | 1.0 | 09 Sep 2013 |
| 25 | 1.0 | 05 Sep 2015 |
Ranked daily data from 2009 to present for London, NW3. For Max 1hr Temp Rise, there are 485 valid values in Sep.