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USGS Daily Statistics for Illinois

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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 05536085 NB CHICAGO RIVER AT N PULASKI ROAD AT CHICAGO, IL


Cook County, Illinois
Hydrologic Unit Code 07120003
Latitude  41°58'29", Longitude  87°43'42" NAD83
Drainage area 112.4  square miles
Gage datum 575.40 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 2017-10-01 -> 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
1 218 201 269 440 580 115 189 48 81 85 188 118
2 175 123 217 386 493 152 188 42 104 123 141 210
3 170 120 180 381 619 109 188 40 125 202 108 198
4 160 173 156 342 550 91 115 31 148 181 91 180
5 120 187 205 350 358 191 141 34 138 132 129 143
6 97 174 225 344 279 205 168 44 135 144 157 123
7 85 177 177 296 263 126 103 67 120 116 117 107
8 94 178 162 268 220 97 88 84 140 145 81 97
9 99 184 196 224 259 145 56 70 153 121 62 83
10 154 201 273 171 257 194 103 101 113 94 57 76
11 196 154 246 142 173 116 102 93 122 121 71 99
12 201 135 192 135 137 81 85 63 214 169 67 139
13 196 104 182 119 144 112 85 51 263 121 53 151
14 146 79 215 122 199 126 118 48 246 139 63 111
15 114 90 233 131 426 77 187 99 213 142 63 157
16 101 82 200 144 368 168 238 86 185 108 61 146
17 100 178 168 127 296 137 245 84 165 80 57 111
18 90 161 162 111 399 88 235 71 164 59 60 86
19 88 120 164 105 330 86 260 67 149 46 71 65
20 81 105 166 83 258 92 151 55 122 41 61 56
21 72 97 155 112 304 188 174 68 102 38 80 50
22 62 124 124 108 391 217 227 49 110 100 99 47
23 63 266 141 175 333 305 231 35 165 117 74 56
24 87 299 179 156 307 311 260 47 118 113 61 59
25 145 269 218 145 309 349 252 62 100 205 69 50
26 198 207 242 127 262 384 198 92 75 215 141 61
27 218 213 190 100 241 406 165 149 70 258 182 89
28 190 286 239 112 195 319 158 135 145 242 143 102
29 145 114 263 240 211 271 149 157 132 207 97 157
30 115   268 446 198 254 115 141 123 217 77 207
31 133   310   146   68 94   203   195