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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 01186500 STILL RIVER AT ROBERTSVILLE, CT


Northwest Hills Planning Region County, Connecticut
Hydrologic Unit Code 010802070103
Latitude  41°58'04.52", Longitude  73°02'00.40" NAD83
Drainage area 85.0  square miles
Gage datum 509.61 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 1948-10-01 -> 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
1 211 165 194 441 252 193 94 71 58 128 136 202
2 186 193 204 430 228 177 83 63 94 120 135 208
3 177 243 196 459 221 163 83 61 69 111 192 186
4 170 210 215 485 214 152 87 67 58 105 169 174
5 183 193 213 518 204 152 84 88 48 96 179 180
6 192 171 274 453 236 212 75 65 75 97 160 182
7 170 180 316 413 224 214 65 61 85 96 156 205
8 168 167 267 378 202 182 64 52 78 102 159 198
9 198 152 274 333 207 154 79 64 66 131 178 193
10 208 151 263 369 215 145 111 94 55 112 158 204
11 201 195 289 347 227 128 77 82 68 95 157 222
12 199 188 279 328 235 126 72 80 69 100 177 229
13 205 185 288 340 238 136 76 81 64 92 171 217
14 208 182 310 337 213 162 100 83 57 98 162 227
15 193 179 293 319 194 154 85 73 53 189 160 211
16 190 187 283 424 201 140 107 59 62 202 153 185
17 169 175 278 417 202 123 82 56 78 157 172 173
18 185 188 275 339 187 111 83 103 85 127 153 215
19 192 178 288 306 191 108 64 396 91 124 131 197
20 191 201 322 310 196 90 62 103 81 189 151 167
21 178 205 321 276 185 94 68 63 70 171 176 252
22 174 212 380 252 158 94 63 62 76 135 167 221
23 191 210 354 277 148 98 59 71 76 120 171 197
24 209 227 330 275 174 103 67 63 97 148 150 206
25 261 264 324 254 190 88 57 47 121 138 166 228
26 270 249 323 237 169 85 56 41 129 138 199 210
27 279 218 356 253 153 80 67 39 150 127 205 203
28 257 208 340 242 133 86 72 122 132 139 188 195
29 204 242 380 256 160 84 69 79 163 133 189 180
30 179   419 246 192 107 74 61 152 156 189 190
31 162   458   189   65 53   156   267