Cornwall Consecutive 30 Degree Days
This page shows the record for the most days in a row in
Cornwall, Ontario where the
high temperature was
at least 30 °C, from 1867–2024.
Longest Streak: 12 Days
Between Jun 30 – Jul 11, 1955, the daily high temperature in Cornwall was always at least 30 °C – a span of 12 days.
| # Days |
When |
| 12 |
Jun 30 – Jul 11, 1955 |
| 11 |
Jul 31 – Aug 10, 2001 |
| * 11 |
Jul 9–21, 1868 |
| 10 |
Jul 1–10, 2020 |
| 9 |
Aug 10–18, 2002 |
| 9 |
Jun 24 – Jul 2, 1963 |
| 8 |
Jul 30 – Aug 6, 1955 |
| 8 |
Aug 14–21, 1884 |
| 7 |
Jun 17–23, 2020 |
| 7 |
Jun 29 – Jul 5, 2018 |
| 7 |
Jul 31 – Aug 6, 2016 |
| 7 |
Jul 11–17, 2012 |
| 7 |
Aug 8–14, 1988 |
| 7 |
Aug 28 – Sep 3, 1973 |
| 7 |
Jul 30 – Aug 5, 1887 |
| 6 |
Jul 19–24, 2022 |
| 6 |
Jul 25–30, 2019 |
| 6 |
Jul 14–19, 2013 |
| * 6 |
Jul 29 – Aug 5, 2012 |
| 6 |
Aug 29 – Sep 3, 2010 |
Note: streaks marked with a (*) contain days with missing data