About this river
Johnson Creek is a 2.5 mile river near Riverplace Marina in Oregon. Streamflow is measured at the USGS gauge Johnson Creek at Milwaukie, OR (site 14211550). The National Hydrography Dataset places it at stream order 5. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1990 to 2025
Johnson Creek typically runs highest in January, at a median 105 cfs, and lowest in August, at 17 cfs. The highest flow on record for any single day is 1,730 cfs, in 2008.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 105 | 60 to 207 | |
| February | 89 | 49 to 152 | |
| March | 79 | 50 to 134 | |
| April | 62 | 39 to 96 | |
| May | 35 | 25 to 57 | |
| June | 27 | 20 to 38 | |
| July | 18 | 15 to 21 | |
| August | 17 | 15 to 20 | |
| September | 18 | 15 to 21 | |
| October | 20 | 16 to 33 | |
| November | 52 | 31 to 105 | |
| December | 93 | 52 to 174 |
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 35 years of record. Statistics published by the US Geological Survey for Johnson Creek at Milwaukie, OR (site 14211550). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Johnson Creek's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
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