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USGS Surface-Water 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 06038500 Madison River bl Hebgen Lake nr Grayling MT


Gallatin County, Montana
Hydrologic Unit Code 10020007
Latitude  44°51'59.01", Longitude 111°20'19.61" NAD83
Drainage area 931  square miles
Gage datum 6,448.47 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 1938-10-01 -> 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
1 921 870 825 916 901 1,220 1,100 1,080 1,100 1,130 1,300 1,070
2 920 874 828 919 882 1,250 1,080 1,090 1,090 1,180 1,310 1,040
3 919 873 825 931 871 1,250 1,070 1,080 1,090 1,170 1,320 1,000
4 916 872 820 930 863 1,260 1,050 1,090 1,080 1,160 1,310 984
5 916 870 817 920 847 1,290 1,050 1,090 1,070 1,150 1,310 976
6 920 868 822 920 836 1,320 1,040 1,080 1,070 1,150 1,310 968
7 924 862 825 931 832 1,320 1,020 1,070 1,070 1,160 1,300 959
8 919 856 829 946 823 1,320 1,010 1,060 1,090 1,150 1,300 961
9 914 855 826 960 822 1,340 1,000 1,060 1,100 1,170 1,320 956
10 916 855 818 959 816 1,350 1,010 1,060 1,110 1,190 1,340 948
11 920 854 819 944 809 1,330 1,010 1,050 1,120 1,190 1,330 950
12 919 853 818 939 820 1,300 1,020 1,050 1,120 1,200 1,330 954
13 916 858 813 943 835 1,280 1,020 1,040 1,110 1,220 1,310 968
14 919 860 826 945 838 1,290 999 1,040 1,110 1,250 1,300 974
15 917 857 848 946 842 1,290 997 1,050 1,110 1,260 1,300 975
16 912 858 856 952 856 1,270 997 1,050 1,100 1,260 1,280 972
17 903 854 862 951 868 1,260 1,010 1,040 1,110 1,270 1,280 966
18 898 852 863 949 870 1,250 1,020 1,030 1,110 1,270 1,260 962
19 897 852 861 939 862 1,250 1,020 1,030 1,120 1,300 1,270 962
20 899 853 860 934 859 1,230 1,020 1,040 1,110 1,300 1,280 960
21 897 854 868 937 863 1,190 1,040 1,040 1,110 1,300 1,290 965
22 892 853 874 936 877 1,160 1,040 1,040 1,110 1,300 1,270 963
23 889 847 877 932 891 1,140 1,040 1,040 1,090 1,290 1,220 950
24 886 840 879 924 913 1,120 1,040 1,060 1,080 1,250 1,200 934
25 880 835 882 925 933 1,130 1,040 1,070 1,080 1,250 1,180 934
26 874 831 883 930 965 1,110 1,060 1,090 1,090 1,250 1,170 934
27 872 829 885 925 1,020 1,140 1,070 1,090 1,110 1,250 1,160 932
28 872 826 891 918 1,080 1,160 1,070 1,080 1,110 1,280 1,140 928
29 874 834 893 908 1,130 1,170 1,070 1,090 1,110 1,290 1,120 927
30 870   905 906 1,160 1,140 1,070 1,090 1,110 1,290 1,100 929
31 868   915   1,170   1,080 1,090   1,290   927