Thunder Bay Longest Rain Streaks

What's the most days it has rained in a row in Thunder Bay history? This page shows the most consecutive days with precipitation (rain or snow) in Thunder Bay, Ontario from 1941–2024.

Longest dry streaks

Longest Streak: 46 Days

Between Aug 9 – Sep 23, 2009, there was at least 0.01 inches of rain or 0.1 inches of snow recorded each day in Thunder Bay.

# Days	When
46	Aug 9 – Sep 23, 2009
15	Aug 13–27, 1998
14	Jun 8–21, 2017
13	May 17–29, 1999
12	Oct 7–18, 2010
12	Sep 10–21, 1999
11	Nov 28 – Dec 8, 2016
11	Jun 10–20, 1999
11	Sep 27 – Oct 7, 1983
10	Dec 14–23, 2022
10	Jun 21–30, 2004
10	Jun 20–29, 2000
10	Nov 3–12, 1972
10	Sep 26 – Oct 5, 1972
10	Nov 19–28, 1965
10	Jan 22–31, 1946
9	Sep 20–28, 2018
9	Sep 11–19, 2016
9	Feb 2–10, 2016
9	Jul 26 – Aug 3, 2009

Weather Station Details

Years	Station	Coordinates
2004–2024	Thunder Bay CS	location
1941–2003	Thunder Bay A	location