About this river
Lehigh River is a 12.9 mile river near Historic Bethlehem River Tours in Pennsylvania. Streamflow is measured at the USGS gauge Lehigh River at Glendon, PA (site 01454700). The National Hydrography Dataset places it at stream order 6. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1967 to 2026
Lehigh River typically runs highest in March, at a median 3,670 cfs, and lowest in September, at 1,040 cfs. The highest flow on record for any single day is 44,700 cfs, in 2021.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 2,260 | 1,420 to 3,660 | |
| February | 2,540 | 1,670 to 3,610 | |
| March | 3,670 | 2,360 to 4,940 | |
| April | 3,420 | 2,330 to 5,050 | |
| May | 2,720 | 2,020 to 3,930 | |
| June | 2,050 | 1,385 to 2,960 | |
| July | 1,370 | 1,060 to 1,990 | |
| August | 1,220 | 878 to 1,860 | |
| September | 1,040 | 797 to 1,910 | |
| October | 1,370 | 891 to 2,460 | |
| November | 2,015 | 1,245 to 3,235 | |
| December | 2,560 | 1,640 to 4,460 |
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 46 years of record. Statistics published by the US Geological Survey for Lehigh River at Glendon, PA (site 01454700). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
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Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Lehigh River'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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