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USGS Daily Statistics for Montana

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Questions or concerns about USGS data and data products in Montana and Wyoming can be directed to the Wyoming-Montana Water Science Center Data Management Section.


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 12302055 Fisher River near Libby MT


Lincoln County, Montana
Hydrologic Unit Code 17010102
Latitude  48°21'20.17", Longitude 115°18'52.74" NAD83
Drainage area 842  square miles
Gage datum 2,134.1 feet above NGVD29
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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 1967-10-01 -> 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
1 179 269 357 831 1,310 1,130 438 157 110 112 169 259
2 185 264 361 833 1,290 1,090 424 154 109 114 170 249
3 187 252 371 842 1,310 1,070 406 152 109 112 180 255
4 191 243 381 848 1,340 1,040 391 149 108 113 189 270
5 188 243 378 863 1,360 1,010 372 146 107 114 201 299
6 185 241 384 918 1,390 983 356 144 106 113 194 270
7 189 246 395 980 1,410 949 342 141 107 113 216 243
8 204 274 404 1,010 1,400 917 330 139 106 113 206 223
9 213 380 406 1,030 1,370 893 315 136 105 114 206 231
10 232 374 440 1,060 1,360 847 308 133 105 113 205 236
11 226 319 451 1,070 1,350 815 299 130 104 116 213 233
12 210 296 478 1,100 1,340 799 287 128 105 123 242 235
13 207 282 519 1,110 1,350 795 280 127 105 121 229 232
14 214 276 523 1,150 1,350 799 277 126 104 122 214 235
15 247 274 542 1,180 1,380 803 266 125 104 124 209 232
16 355 287 609 1,140 1,420 794 254 125 105 128 207 222
17 367 298 627 1,130 1,440 775 244 123 107 131 203 217
18 329 297 624 1,140 1,430 744 236 122 112 127 199 212
19 294 306 659 1,140 1,380 705 230 119 118 125 194 203
20 277 343 665 1,160 1,320 671 223 117 114 125 190 193
21 265 378 672 1,230 1,270 657 216 117 115 128 202 189
22 252 363 655 1,260 1,270 640 208 117 112 129 199 189
23 240 372 654 1,280 1,260 621 201 117 111 132 206 191
24 231 350 665 1,360 1,250 593 195 116 109 131 237 189
25 228 354 683 1,410 1,260 564 191 116 109 141 293 187
26 221 353 704 1,360 1,260 536 186 117 110 146 279 201
27 217 343 725 1,340 1,250 513 180 114 109 147 239 232
28 213 347 734 1,360 1,220 491 175 112 108 149 220 213
29 211 470 746 1,340 1,180 472 169 111 109 154 245 196
30 219   758 1,310 1,170 461 166 110 110 155 284 189
31 257   803   1,160   161 110   159   186