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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
1 212 90 298 499 580 115 189 48 81 85 188 135
2 182 85 239 403 493 152 188 42 104 123 141 241
3 184 112 199 355 619 109 188 40 125 202 108 228
4 177 184 169 348 550 91 115 31 148 181 91 207
5 133 204 191 366 358 191 141 34 138 132 129 165
6 105 192 209 368 279 205 168 44 135 144 157 140
7 93 198 170 321 263 126 103 67 120 116 117 121
8 105 201 158 292 220 97 88 84 140 145 81 109
9 112 209 206 245 259 145 56 70 153 121 62 94
10 175 231 300 180 257 194 103 101 113 94 57 85
11 224 177 271 149 173 116 102 93 122 121 71 111
12 230 155 210 145 137 81 85 63 214 169 67 160
13 225 119 200 128 144 112 85 51 263 121 53 174
14 167 91 239 132 199 126 118 48 246 139 63 127
15 129 102 245 143 426 77 187 99 213 142 63 174
16 113 94 203 160 368 168 238 86 185 108 61 161
17 112 207 169 140 296 137 245 84 165 80 57 122
18 101 187 168 122 399 88 235 71 164 59 60 94
19 100 138 172 113 330 86 260 67 149 46 71 70
20 92 120 159 87 258 92 151 55 122 41 61 58
21 80 110 141 109 304 188 174 68 102 38 80 52
22 68 141 115 111 391 217 227 49 110 100 99 49
23 70 307 141 189 333 305 231 35 165 117 74 60
24 97 344 184 169 307 311 260 47 118 113 61 63
25 164 297 232 152 309 349 252 62 100 205 67 53
26 226 222 264 127 262 384 198 92 75 215 154 66
27 250 226 207 104 241 406 165 149 70 258 204 98
28 217 314 264 120 195 319 158 135 145 242 160 108
29 164 114 293 268 211 271 149 157 132 207 108 167
30 129   295 446 198 254 115 141 123 217 85 216
31 104   345   146   68 94   203   192