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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
1 118 111 106 279 926 2,370 2,050 1,170 836 450 293 218
2 115 110 107 293 962 2,380 2,000 1,160 821 445 291 215
3 114 110 108 308 997 2,390 1,960 1,130 802 439 286 213
4 112 109 111 324 1,030 2,440 1,930 1,110 784 427 283 211
5 109 109 114 342 1,060 2,480 1,900 1,090 770 414 278 206
6 108 109 117 360 1,100 2,530 1,860 1,070 759 407 278 201
7 109 108 121 375 1,150 2,600 1,820 1,060 746 396 287 195
8 109 108 125 386 1,200 2,710 1,790 1,050 735 383 327 189
9 110 109 129 398 1,250 2,780 1,740 1,040 729 371 347 184
10 110 109 134 412 1,300 2,670 1,720 1,030 723 362 338 181
11 111 110 140 428 1,340 2,590 1,700 1,020 717 352 323 179
12 111 110 146 443 1,380 2,530 1,670 1,010 705 348 317 174
13 112 109 151 460 1,420 2,490 1,650 1,000 692 346 320 170
14 112 109 154 477 1,470 2,460 1,640 997 680 343 326 165
15 113 108 158 490 1,520 2,430 1,640 991 669 341 330 159
16 113 107 167 503 1,570 2,420 1,620 981 659 340 327 156
17 113 106 179 514 1,640 2,430 1,580 969 646 342 318 153
18 115 106 191 523 1,710 2,440 1,540 957 634 342 308 150
19 115 106 198 537 1,800 2,460 1,500 947 623 338 297 147
20 115 105 203 560 1,890 2,540 1,480 941 614 333 286 145
21 116 105 209 587 1,960 2,530 1,450 936 603 328 276 143
22 116 105 216 619 2,020 2,440 1,420 929 592 324 267 141
23 115 105 222 658 2,080 2,340 1,390 920 573 322 259 138
24 115 105 227 699 2,130 2,290 1,360 915 550 318 255 134
25 115 105 235 739 2,170 2,260 1,330 909 526 311 257 130
26 114 105 244 775 2,220 2,230 1,300 904 511 306 255 127
27 114 104 250 806 2,260 2,200 1,270 895 495 300 249 125
28 114 105 255 833 2,300 2,160 1,240 884 484 292 242 123
29 114 102 257 857 2,320 2,120 1,230 873 470 290 234 122
30 113   263 886 2,340 2,090 1,210 859 456 292 224 122
31 111   270   2,360   1,190 848   295   120