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USGS Daily Statistics for Pennsylvania

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[!] Over the next year, the USGS Pennsylvania Water Science Center will be updating the geodetic vertical elevation (gage datum) for many locations. Click HERE for additional information including a current list of streamgages with upcoming datum changes. This update in gage datum does not affect the location of the streamgage, nor the observed local gage height or discharge recorded at the streamgage.


The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 01570500 Susquehanna River at Harrisburg, PA


Dauphin County, Pennsylvania
Hydrologic Unit Code 02050305
Latitude  40°15'17", Longitude  76°53'11" NAD27
Drainage area 24,100  square miles
Gage datum 289.34 feet above NAVD88
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00060, Discharge, cubic feet per second,
Day of
month		 Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 1890-10-01 -> 2025-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 39,400 35,300 57,600 87,100 50,800 34,700 22,100 13,200 12,300 17,600 24,400 37,100
2 39,400 34,800 60,800 87,100 51,500 32,400 21,200 13,400 13,100 17,200 23,500 37,500
3 39,900 34,900 60,200 87,000 49,200 31,200 20,400 13,300 12,700 16,800 23,600 37,100
4 39,900 36,500 58,500 87,000 47,200 31,200 19,500 13,300 12,300 16,200 23,400 36,200
5 38,400 37,400 58,800 86,000 47,700 31,400 19,000 13,500 12,700 15,200 23,100 36,200
6 37,900 35,300 64,400 86,600 47,200 30,300 18,300 13,000 12,300 14,600 23,600 36,000
7 38,600 34,900 67,100 86,700 46,600 30,000 17,400 12,500 13,200 14,000 23,300 35,500
8 39,400 35,200 68,600 84,500 46,800 29,000 16,600 12,400 15,500 13,800 22,800 35,000
9 39,800 34,100 66,400 82,000 46,600 27,500 16,500 12,300 14,800 14,000 23,600 35,000
10 39,700 32,700 66,200 80,400 45,300 25,800 17,100 12,900 13,800 15,000 25,700 34,100
11 37,800 32,500 68,700 78,000 45,100 24,700 17,600 13,700 14,400 15,600 25,800 34,600
12 35,900 35,300 70,800 74,100 46,100 23,800 16,500 13,400 13,900 15,600 25,500 36,400
13 35,400 35,500 72,400 71,000 47,600 23,500 15,400 13,100 12,900 15,700 25,900 37,000
14 36,200 35,400 73,600 69,600 49,000 23,600 15,000 13,300 12,500 15,900 26,800 38,300
15 37,600 38,100 75,500 70,900 48,600 23,400 15,000 13,400 12,100 16,100 26,500 39,700
16 37,300 40,300 77,100 73,200 46,200 23,400 14,400 13,500 11,600 16,400 26,100 40,600
17 35,900 41,300 76,400 73,600 45,100 24,400 14,500 12,900 12,300 16,700 27,700 38,900
18 34,600 41,800 76,300 72,000 44,000 25,000 14,100 12,000 13,600 16,600 29,300 37,500
19 33,300 42,400 76,700 66,300 43,000 24,300 13,200 13,300 16,300 17,400 30,200 36,400
20 35,100 41,800 74,800 61,600 43,300 23,800 13,600 14,000 16,300 19,000 29,900 35,400
21 37,300 42,200 72,600 59,800 44,500 22,900 13,500 13,200 14,100 20,400 30,000 34,500
22 39,100 45,000 73,300 60,300 46,600 25,700 13,400 12,200 13,100 21,600 29,500 34,600
23 40,600 47,100 75,400 59,800 47,100 30,100 14,400 11,700 12,800 21,800 29,100 34,900
24 41,400 49,000 77,300 57,800 45,700 29,100 15,100 12,600 13,900 21,700 28,100 35,600
25 43,300 52,400 77,900 55,900 42,500 26,100 16,100 13,900 13,800 21,900 27,400 37,600
26 44,700 55,900 76,800 55,400 41,000 23,300 16,900 12,800 15,700 22,000 28,600 38,800
27 44,800 57,700 77,300 55,300 39,600 21,400 16,000 11,700 17,400 21,700 30,600 37,400
28 43,600 56,200 82,200 54,000 38,500 21,300 14,400 11,200 17,100 22,200 32,700 36,000
29 40,600 47,900 86,200 52,900 38,700 22,100 14,400 11,400 17,000 22,600 36,000 34,600
30 37,300   86,700 51,000 38,500 22,400 14,200 11,900 16,400 24,200 37,900 35,000
31 36,000   87,000   37,200   13,600 12,400   25,400   37,900