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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 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 -> 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
1 919 869 824 914 899 1,210 1,100 1,080 1,100 1,120 1,290 1,060
2 918 873 826 917 881 1,230 1,070 1,080 1,090 1,170 1,310 1,030
3 916 872 824 929 870 1,240 1,060 1,080 1,080 1,160 1,310 1,000
4 914 871 819 928 862 1,250 1,040 1,080 1,070 1,160 1,310 981
5 914 869 816 919 846 1,280 1,040 1,080 1,070 1,150 1,310 973
6 918 868 820 919 835 1,310 1,040 1,070 1,070 1,150 1,310 965
7 921 862 824 930 830 1,310 1,020 1,070 1,070 1,160 1,300 957
8 917 856 828 945 822 1,310 1,000 1,060 1,090 1,150 1,300 958
9 912 855 824 959 821 1,320 1,000 1,060 1,100 1,160 1,310 954
10 914 855 817 957 815 1,340 1,010 1,060 1,110 1,180 1,330 945
11 919 854 818 943 808 1,320 1,010 1,050 1,110 1,190 1,330 948
12 917 853 817 938 818 1,290 1,020 1,050 1,120 1,200 1,320 951
13 914 859 812 942 833 1,270 1,020 1,040 1,100 1,220 1,300 965
14 918 860 825 944 836 1,280 1,000 1,040 1,100 1,240 1,290 971
15 916 858 846 945 840 1,280 1,000 1,050 1,100 1,250 1,290 972
16 912 859 854 951 854 1,260 1,000 1,040 1,100 1,250 1,280 969
17 904 855 860 950 867 1,250 1,010 1,040 1,110 1,260 1,270 963
18 899 852 861 947 869 1,230 1,020 1,030 1,110 1,270 1,250 959
19 898 852 859 936 861 1,230 1,030 1,030 1,110 1,290 1,260 960
20 900 852 858 932 860 1,210 1,030 1,030 1,110 1,290 1,270 958
21 898 852 867 935 864 1,170 1,050 1,040 1,110 1,290 1,280 962
22 893 851 872 934 878 1,150 1,040 1,030 1,100 1,290 1,260 960
23 890 846 875 929 892 1,130 1,040 1,030 1,090 1,280 1,210 947
24 886 839 877 922 914 1,110 1,040 1,050 1,080 1,250 1,200 932
25 879 834 880 923 934 1,120 1,040 1,070 1,070 1,250 1,170 931
26 872 830 881 928 965 1,100 1,060 1,080 1,090 1,240 1,170 932
27 871 828 883 923 1,020 1,130 1,070 1,090 1,100 1,250 1,160 930
28 871 825 889 916 1,080 1,160 1,070 1,080 1,100 1,270 1,140 926
29 873 834 891 906 1,120 1,160 1,070 1,080 1,100 1,280 1,120 924
30 869   903 904 1,160 1,130 1,070 1,090 1,110 1,290 1,090 927
31 867   913   1,160   1,080 1,090   1,280   924