About this river
Monocacy Creek is a 4.6 mile stream near Historic Bethlehem River Tours in Pennsylvania. Streamflow is measured at the USGS gauge Monocacy Creek at Bethlehem, PA (site 01452500). The National Hydrography Dataset places it at stream order 4. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1949 to 2026
Monocacy Creek typically runs highest in March, at a median 68 cfs, and lowest in September, at 33 cfs. The highest flow on record for any single day is 2,290 cfs, in 2004.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 47 | 28 to 77 | |
| February | 54 | 34 to 81 | |
| March | 68 | 46 to 95 | |
| April | 63 | 43 to 93 | |
| May | 52 | 36 to 77 | |
| June | 46 | 33 to 64 | |
| July | 42 | 31 to 55 | |
| August | 37 | 28 to 52 | |
| September | 33 | 25 to 48 | |
| October | 34 | 26 to 50 | |
| November | 36 | 25 to 58 | |
| December | 46 | 28 to 77 |
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 78 years of record. Statistics published by the US Geological Survey for Monocacy Creek at Bethlehem, PA (site 01452500). 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 Monocacy 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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