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USGS Daily Statistics for the Nation

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
1 919 869 824 914 901 1,210 1,100 1,080 1,100 1,120 1,290 1,060
2 918 873 826 917 882 1,240 1,070 1,090 1,090 1,170 1,310 1,030
3 916 872 824 929 871 1,250 1,070 1,080 1,080 1,160 1,310 1,000
4 914 871 819 928 864 1,260 1,050 1,090 1,070 1,160 1,310 981
5 914 869 816 919 848 1,290 1,050 1,080 1,070 1,150 1,310 973
6 918 868 820 919 837 1,320 1,040 1,070 1,070 1,150 1,310 965
7 921 862 824 930 833 1,320 1,020 1,070 1,070 1,160 1,300 957
8 917 856 828 945 824 1,320 1,010 1,060 1,090 1,150 1,300 958
9 912 855 824 959 823 1,330 1,000 1,060 1,100 1,160 1,310 954
10 914 855 817 959 817 1,350 1,020 1,060 1,110 1,180 1,330 945
11 919 854 818 944 810 1,330 1,010 1,050 1,110 1,190 1,330 948
12 917 853 817 939 821 1,300 1,020 1,050 1,120 1,200 1,320 951
13 914 859 812 943 836 1,280 1,020 1,040 1,100 1,220 1,300 965
14 918 860 825 945 839 1,290 1,000 1,040 1,100 1,240 1,290 971
15 916 858 846 946 843 1,290 999 1,050 1,100 1,250 1,290 972
16 912 859 854 952 857 1,270 1,000 1,050 1,100 1,250 1,280 969
17 904 855 860 951 870 1,250 1,010 1,040 1,110 1,260 1,270 963
18 899 852 861 948 872 1,240 1,020 1,030 1,110 1,270 1,250 959
19 898 852 859 937 863 1,240 1,020 1,030 1,110 1,290 1,260 960
20 900 852 858 933 862 1,220 1,030 1,040 1,110 1,290 1,270 958
21 898 852 867 936 866 1,180 1,050 1,040 1,110 1,290 1,280 962
22 893 851 872 935 880 1,160 1,040 1,030 1,100 1,290 1,260 960
23 890 846 875 930 894 1,140 1,040 1,040 1,090 1,280 1,210 947
24 886 839 877 923 917 1,120 1,040 1,050 1,080 1,250 1,200 932
25 879 834 880 924 937 1,120 1,040 1,070 1,070 1,250 1,170 931
26 872 830 881 929 968 1,110 1,060 1,080 1,090 1,240 1,170 932
27 871 828 883 924 1,030 1,140 1,070 1,090 1,100 1,250 1,160 930
28 871 825 889 917 1,080 1,160 1,070 1,080 1,100 1,270 1,140 926
29 873 834 891 907 1,130 1,160 1,070 1,080 1,100 1,280 1,120 924
30 869   903 905 1,160 1,140 1,070 1,090 1,110 1,290 1,090 927
31 867   913   1,170   1,080 1,090   1,280   924