London Consecutive 25 Degree Days
This page shows the record for the most days in a row in
London, Ontario where the
high temperature was
at least 25 °C, from 1883–2024.
Longest Streak: 42 Days
Between Jun 27 – Aug 7, 1955, the daily high temperature in London was always at least 25 °C – a span of 42 days.
| # Days |
When |
| 42 |
Jun 27 – Aug 7, 1955 |
| 41 |
Jun 30 – Aug 9, 2011 |
| 40 |
Jul 4 – Aug 12, 1916 |
| * 34 |
Jul 17 – Aug 20, 2016 |
| 33 |
Jul 6 – Aug 7, 1922 |
| 31 |
Aug 14 – Sep 13, 1900 |
| 30 |
May 26 – Jun 24, 1919 |
| 28 |
Jul 13 – Aug 9, 2019 |
| 27 |
Jun 13 – Jul 9, 1921 |
| 26 |
Jun 10 – Jul 5, 1949 |
| 26 |
Jul 15 – Aug 9, 1930 |
| 26 |
Jun 11 – Jul 6, 1901 |
| 25 |
Jul 24 – Aug 17, 1988 |
| 25 |
Jul 9 – Aug 2, 1894 |
| 24 |
Jul 3–26, 2005 |
| 24 |
Jul 8–31, 1901 |
| 23 |
Aug 11 – Sep 2, 1959 |
| 23 |
Aug 3–25, 1947 |
| 23 |
Jun 28 – Jul 20, 1910 |
| 23 |
Jun 30 – Jul 22, 1897 |
Note: streaks marked with a (*) contain days with missing data