Historical Ranked Monthly Data for May - Mean Rain Rate / mm/h
Weather Variable:
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| Top monthly mean | ||
| Rank | Value | Date |
| 1 | 3.8 | May 2025 |
| 2 | 2.6 | May 2020 |
| 3 | 2.1 | May 2010 |
| 4 | 1.9 | May 2011 |
| 5 | 1.7 | May 2017 |
| 6 | 1.4 | May 2018 |
| 7 | 1.3 | May 2015 |
| 8 | 1.2 | May 2024 |
| 9 | 1.2 | May 2016 |
| 10 | 1.1 | May 2012 |
| Bottom monthly mean | ||
| Rank | Value | Date |
| 1 | 0.8 | May 2022 |
| 2 | 0.8 | May 2026 |
| 3 | 0.8 | May 2013 |
| 4 | 0.9 | May 2009 |
| 5 | 1.0 | May 2014 |
| 6 | 1.1 | May 2021 |
| 7 | 1.1 | May 2019 |
| 8 | 1.1 | May 2023 |
| 9 | 1.1 | May 2012 |
| 10 | 1.2 | May 2016 |
Mean Rain Rate monthly extremes: highest and lowest monthly means.
There are 18 valid months for the chosen period from 2009 to present for May in London, NW3.
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