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North Thames River in Ontario

River50.2 mi
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Around North Thames River

10 mi

Public land: USGS PAD-US

About this river

North Thames River is a 50.2 mile river. Streamflow is measured at the Water Survey of Canada gauge North Thames River near Thorndale (site 02GD015). Reach geometry comes from Natural Resources Canada's National Hydro Network.

Typical flow by month

1953 to 2025

North Thames River typically runs highest in March, at a median 911 cfs, and lowest in August, at 85 cfs. The highest flow on record for any single day is 27,051 cfs, in 2008.

Show the numbers
Typical flow by month at North Thames River near Thorndale, in cfs
MonthTypical (cfs)Usual range (cfs)
January297200 to 681
February271157 to 614
March911439 to 1,955
April653356 to 1,205
May272191 to 529
June12880 to 233
July9161 to 155
August8562 to 123
September9767 to 171
October13272 to 316
November283129 to 705
December456226 to 858

Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 72 years of record. Statistics published by the US Geological Survey for North Thames River near Thorndale (site 02GD015). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.

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