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USGS Daily Statistics for the Nation

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 01119382 WILLIMANTIC RIVER AT MERROW RD. NEAR MERROW, CT


Capitol Planning Region County, Connecticut
Hydrologic Unit Code 011000020108
Latitude  41°49'26.44", Longitude  72°18'46.25" NAD83
Drainage area 96.3  square miles
Gage datum 319.0 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 2008-10-01 -> 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
1 231 197 273 403 317 159 122 66 71 119 159 183
2 212 188 273 357 275 172 150 65 231 100 139 176
3 193 182 302 341 246 149 162 64 134 102 169 177
4 197 202 259 375 238 136 243 79 93 110 146 167
5 205 210 228 344 221 131 173 85 75 120 128 164
6 214 190 285 314 222 124 116 81 77 98 124 176
7 195 187 473 319 201 131 111 81 95 88 121 193
8 172 203 354 338 194 202 100 91 126 92 115 248
9 163 183 286 317 200 155 203 80 118 77 106 208
10 289 167 283 295 204 127 270 91 98 70 119 243
11 230 192 326 263 188 147 147 85 89 68 123 289
12 238 211 336 275 180 167 125 70 86 72 121 251
13 309 208 339 329 174 151 120 69 115 73 134 238
14 250 201 373 318 187 231 137 65 95 103 137 256
15 220 182 346 315 188 188 126 82 71 97 121 226
16 220 197 334 379 228 140 152 97 60 87 122 200
17 219 219 317 462 227 118 187 68 52 127 140 209
18 219 218 290 348 258 113 288 97 61 98 128 298
19 230 206 270 321 226 113 204 159 75 88 119 275
20 221 201 258 306 205 102 138 122 60 92 133 199
21 183 196 239 298 191 102 105 78 52 94 123 211
22 163 193 248 269 160 100 100 84 57 85 123 232
23 179 217 286 322 150 105 108 100 59 79 143 238
24 259 243 330 300 190 93 104 90 76 78 152 240
25 333 323 302 255 172 90 103 70 91 107 159 293
26 348 356 273 253 160 95 112 70 102 138 139 272
27 280 306 261 326 150 83 104 70 83 142 178 236
28 243 299 278 268 134 111 106 158 75 143 164 246
29 221 319 333 232 166 129 101 149 118 142 138 230
30 202   451 226 167 103 113 91 148 227 170 240
31 205   438   168   83 70   189   225