Historical Ranked Daily Data for May - Max 1hr Hum Fall / %
Weather Variable:
| Highest | ||
| Rank | Value | Date |
| 1 | 29 | 10 May 2014 |
| 2 | 27 | 23 May 2025 |
| 3 | 27 | 08 May 2009 |
| 4 | 26 | 04 May 2013 |
| 5 | 25 | 21 May 2011 |
| 6 | 25 | 21 May 2010 |
| 7 | 24 | 22 May 2022 |
| 8 | 24 | 14 May 2018 |
| 9 | 24 | 07 May 2018 |
| 10 | 24 | 09 May 2013 |
| 11 | 24 | 17 May 2009 |
| 12 | 23 | 13 May 2013 |
| 13 | 23 | 16 May 2009 |
| 14 | 22 | 09 May 2025 |
| 15 | 22 | 15 May 2020 |
| 16 | 22 | 08 May 2020 |
| 17 | 22 | 12 May 2019 |
| 18 | 22 | 08 May 2018 |
| 19 | 22 | 05 May 2018 |
| 20 | 22 | 24 May 2016 |
| 21 | 22 | 23 May 2015 |
| 22 | 22 | 18 May 2015 |
| 23 | 22 | 16 May 2015 |
| 24 | 22 | 03 May 2013 |
| 25 | 22 | 01 May 2013 |
| Lowest | ||
| Rank | Value | Date |
| 1 | 1 | 10 May 2016 |
| 2 | 2 | 03 May 2012 |
| 3 | 2 | 31 May 2016 |
| 4 | 2 | 21 May 2024 |
| 5 | 3 | 13 May 2009 |
| 6 | 3 | 01 May 2014 |
| 7 | 3 | 28 May 2014 |
| 8 | 3 | 13 May 2023 |
| 9 | 3 | 22 May 2024 |
| 10 | 3 | 31 May 2024 |
| 11 | 4 | 07 May 2009 |
| 12 | 4 | 27 May 2009 |
| 13 | 4 | 08 May 2010 |
| 14 | 4 | 16 May 2010 |
| 15 | 4 | 08 May 2011 |
| 16 | 4 | 16 May 2011 |
| 17 | 4 | 17 May 2017 |
| 18 | 4 | 29 May 2018 |
| 19 | 4 | 06 May 2024 |
| 20 | 4 | 15 May 2025 |
| 21 | 5 | 20 May 2012 |
| 22 | 5 | 21 May 2012 |
| 23 | 5 | 28 May 2013 |
| 24 | 5 | 27 May 2014 |
| 25 | 5 | 25 May 2016 |
Ranked daily data from 2009 to present for London, NW3. For Max 1hr Hum Fall, there are 556 valid values in May.