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USGS Surface-Water Daily Statistics for Iowa

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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 49 85 93 75 106 33 45 23 33 27
2 24 27 63 70 76 68 116 26 51 34 34 25
3 23 28 66 69 72 71 62 25 42 25 28 23
4 22 29 75 70 69 61 70 25 49 22 42 24
5 21 28 70 72 72 79 55 47 30 31 29 27
6 23 31 79 62 84 66 63 37 28 24 25 25
7 24 37 72 59 78 73 54 23 35 21 23 24
8 24 37 89 54 73 98 61 30 25 25 23 22
9 22 33 85 57 80 106 98 50 25 71 22 22
10 20 42 153 59 102 106 63 58 24 32 24 21
11 20 36 97 66 82 75 58 32 18 25 26 21
12 50 29 85 86 82 133 47 46 18 24 29 21
13 31 33 142 70 114 106 47 34 27 22 27 23
14 23 29 97 71 84 110 65 35 20 29 24 43
15 27 29 73 70 71 96 39 37 28 24 23 27
16 32 32 77 83 99 94 38 67 19 21 26 26
17 35 37 84 68 83 119 54 23 26 26 32 24
18 26 87 95 96 99 115 78 34 36 31 34 23
19 31 79 139 80 75 120 74 22 28 21 29 23
20 35 102 103 86 67 74 56 32 38 19 27 21
21 31 102 81 74 77 80 40 25 30 21 26 23
22 32 59 93 65 69 97 35 25 21 26 24 23
23 28 59 76 71 72 82 31 21 20 32 24 24
24 29 49 67 91 97 113 28 19 21 25 22 25
25 24 61 59 89 89 65 51 19 38 23 24 31
26 29 74 61 80 99 64 40 44 28 24 26 27
27 29 57 63 99 122 65 42 90 22 22 33 34
28 21 58 68 78 137 54 63 53 19 22 28 32
29 26 50 79 103 90 71 50 61 27 27 27 32
30 27   115 99 87 123 39 31 23 32 27 46
31 23   112   82   41 22   28   25