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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 05017500 St. Mary River near Babb MT


Glacier County, Montana
Hydrologic Unit Code 09040001
Latitude  48°49'59", Longitude 113°25'11" NAD27
Drainage area 275  square miles
Gage datum 4,468.13 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 1950-10-01 -> 2024-09-30)

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
1 118 112 107 278 927 2,360 2,050 1,170 836 450 293 218
2 115 111 108 292 963 2,360 2,000 1,150 821 445 291 215
3 114 111 109 307 998 2,380 1,960 1,130 802 439 286 213
4 112 111 112 322 1,030 2,430 1,930 1,110 784 427 283 211
5 109 111 114 341 1,060 2,470 1,900 1,090 770 414 278 206
6 108 111 118 359 1,100 2,520 1,860 1,070 759 407 278 201
7 109 110 121 374 1,140 2,590 1,830 1,060 746 396 287 195
8 109 110 126 385 1,200 2,700 1,790 1,050 735 383 327 189
9 110 111 129 398 1,250 2,770 1,740 1,040 729 371 347 184
10 111 111 134 412 1,290 2,660 1,720 1,030 723 362 338 181
11 111 112 140 427 1,340 2,590 1,700 1,020 717 352 323 179
12 111 112 145 443 1,370 2,530 1,670 1,010 705 348 317 174
13 112 111 151 460 1,420 2,480 1,650 1,000 692 346 320 170
14 112 111 154 479 1,470 2,460 1,640 997 680 343 326 165
15 113 110 158 494 1,520 2,430 1,640 991 669 341 330 159
16 113 109 166 510 1,580 2,410 1,610 981 659 340 327 156
17 113 108 178 523 1,650 2,420 1,570 969 646 342 318 153
18 115 107 190 532 1,720 2,430 1,530 957 634 342 308 150
19 115 106 197 547 1,800 2,440 1,500 947 623 338 297 147
20 115 106 202 569 1,890 2,520 1,470 941 614 333 286 145
21 116 106 208 596 1,960 2,510 1,440 936 603 328 276 143
22 116 105 215 627 2,020 2,420 1,420 929 592 324 267 141
23 115 105 221 665 2,080 2,330 1,390 920 573 322 259 138
24 115 105 227 704 2,120 2,270 1,360 915 550 318 255 134
25 115 105 234 743 2,160 2,250 1,320 909 526 311 257 130
26 114 106 243 779 2,210 2,220 1,290 904 511 306 255 127
27 114 105 250 809 2,250 2,190 1,260 895 495 300 249 125
28 114 105 254 836 2,280 2,160 1,240 884 484 292 242 123
29 114 105 257 859 2,300 2,120 1,220 873 470 290 234 122
30 113   262 888 2,320 2,080 1,210 859 456 292 224 122
31 111   269   2,340   1,190 848   295   120