London Consecutive 20 Degree Days
This page shows the record for the most days in a row in
London, Ontario where the
high temperature was
at least 20 °C, from 1883–2024.
Longest Streak: 106 Days
Between Jun 5 – Sep 19, 1921, the daily high temperature in London was always at least 20 °C – a span of 106 days.
| # Days |
When |
| * 106 |
Jun 5 – Sep 19, 1921 |
| * 102 |
Jun 13 – Sep 23, 2016 |
| 99 |
Jun 10 – Sep 16, 1901 |
| 98 |
Jun 17 – Sep 22, 2002 |
| 95 |
May 24 – Aug 26, 1919 |
| 89 |
Jun 11 – Sep 7, 1998 |
| * 88 |
Jun 21 – Sep 21, 2022 |
| 88 |
Jun 17 – Sep 12, 1899 |
| 85 |
Jun 22 – Sep 14, 1916 |
| 85 |
Jun 24 – Sep 16, 1889 |
| 84 |
Jun 18 – Sep 9, 1999 |
| 84 |
Jun 18 – Sep 9, 1959 |
| 84 |
Jun 9 – Aug 31, 1949 |
| 84 |
Jun 12 – Sep 3, 1910 |
| 83 |
Jun 12 – Sep 2, 1952 |
| 82 |
Jun 12 – Sep 1, 2006 |
| 82 |
Jun 24 – Sep 13, 1906 |
| 81 |
Jun 17 – Sep 5, 1966 |
| 81 |
Jul 2 – Sep 20, 1948 |
| * 80 |
Jun 15 – Sep 4, 2020 |
Note: streaks marked with a (*) contain days with missing data