Boulder Consecutive 90 Degree Days
This page shows the record for the most days in a row in
Boulder, Colorado where the
high temperature was
at least 90 °F, from 1893–2024.
Longest Streak: 18 Days
Between Jul 24 – Aug 11, 1947, the daily high temperature in Boulder was always at least 90 °F – a span of 18 days.
| # Days |
When |
| * 18 |
Jul 24 – Aug 11, 1947 |
| 15 |
Jul 12–26, 2003 |
| 14 |
Aug 1–14, 1958 |
| 14 |
Jul 8–21, 1934 |
| 13 |
Jul 13–25, 2008 |
| 12 |
Jul 6–17, 2005 |
| 12 |
Jul 12–23, 1955 |
| 12 |
Jul 2–13, 1954 |
| 12 |
Jun 6–17, 1952 |
| 11 |
Jun 22 – Jul 2, 2012 |
| 11 |
Jun 28 – Jul 8, 2001 |
| 11 |
Jun 29 – Jul 9, 2000 |
| 11 |
Jun 23 – Jul 3, 1990 |
| 11 |
Jun 30 – Jul 10, 1989 |
| 11 |
Jul 23 – Aug 2, 1987 |
| 11 |
Jul 4–14, 1976 |
| 11 |
Jul 2–12, 1966 |
| 10 |
Aug 15–24, 2023 |
| 10 |
Aug 30 – Sep 8, 2022 |
| 10 |
Jul 11–20, 2019 |
Note: streaks marked with a (*) contain days with missing data