Around here
Around Thompson River
Data Source: Recreation.gov · Source: USGS GNIS · Public land: USGS PAD-US
About this river
Thompson River is a 49.2 mile river. Streamflow is measured at the USGS gauge Thompson River near Thompson Falls MT (site 12389500). The National Hydrography Dataset places it at stream order 6. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1957 to 2026
Thompson River typically runs highest in May, at a median 1,060 cfs, and lowest in December, at 162 cfs. The highest flow on record for any single day is 5,360 cfs, in 1964.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 163 | 129 to 219 |
| February | 172 | 139 to 244 |
| March | 254 | 182 to 391 |
| April | 641 | 403 to 988 |
| May | 1,060 | 758 to 1,560 |
| June | 774 | 491 to 1,240 |
| July | 326 | 233 to 455 |
| August | 214 | 162 to 258 |
| September | 178 | 139 to 211 |
| October | 167 | 137 to 193 |
| November | 172 | 136 to 204 |
| December | 162 | 129 to 210 |
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 69 years of record. Statistics published by the US Geological Survey for Thompson River near Thompson Falls MT (site 12389500). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Made to print
Put Thompson River on your wall
This river section as an art print, drawn over the real terrain with its miles, plus the trails, roads and peaks around it. Pick the colors and the size, and see the finished print before you buy. From $39, shipping included.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Thompson River's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
See every free widget you can put on your site, including live conditions and a 7 day forecast.
