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USGS Daily Statistics for Iowa

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Boating safety tips are available from the U.S. Coast Guard.

NOTE: Station Numbers for Iowa precipitation gages have changed (see list).


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 05452200 Walnut Creek near Hartwick, IA


Poweshiek County, Iowa
Hydrologic Unit Code 07080208
Latitude  41°50'06", Longitude  92°23'10" NAD27
Drainage area 70.9  square miles
Gage datum 786.48 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 1949-10-01 -> 2024-09-30)

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 23 41 48 84 92 75 105 33 45 23 33 27
2 24 27 62 70 75 68 115 26 51 34 34 25
3 22 28 65 68 71 71 62 25 42 25 28 23
4 21 29 74 69 69 61 70 25 49 22 42 24
5 20 28 69 71 71 79 54 47 30 31 29 27
6 22 31 78 62 83 65 63 37 28 24 25 25
7 24 37 71 58 78 73 53 23 35 21 23 24
8 23 37 88 54 72 97 61 29 25 25 23 22
9 21 32 84 56 79 105 97 49 25 71 22 22
10 19 42 151 58 102 106 63 57 24 32 24 21
11 19 35 96 65 82 74 58 32 18 25 26 21
12 50 29 84 85 81 132 47 46 18 24 29 21
13 30 33 140 69 113 105 47 33 27 22 27 23
14 23 29 95 70 83 109 65 35 20 29 24 43
15 27 28 72 69 70 95 40 37 28 24 23 27
16 31 32 76 82 97 93 38 66 19 21 26 26
17 35 37 83 67 82 118 54 23 26 26 32 24
18 26 86 94 95 97 114 77 34 36 31 34 23
19 31 78 137 79 74 119 73 21 28 21 29 23
20 35 100 101 85 72 73 55 31 38 19 27 21
21 30 101 80 73 95 79 40 24 30 21 26 23
22 32 59 92 64 74 96 35 25 21 26 24 23
23 28 58 75 70 74 81 31 21 20 32 24 23
24 29 48 67 90 99 112 28 19 21 25 22 25
25 24 60 59 88 90 65 50 19 38 23 24 30
26 28 73 60 79 100 63 40 43 28 24 26 27
27 29 57 62 98 122 64 42 89 22 22 33 34
28 21 57 67 77 137 54 62 52 19 22 28 31
29 26 48 78 102 90 71 50 61 27 27 27 32
30 26   114 98 87 122 38 31 23 32 27 45
31 23   111   82   40 22   28   25