Results
| Country: | U.S.A.
| | Station: | CANYON FERRY DAM NR HELENA, MT. | | River: | MISSOURI R | | Area: | 25976421.87 | | Lat: | 46.64 | | Lon: | -111.72 | | Source: | USGS | | PointID: | 6058502 | | Area Units: | km2 | | Discharge Units: | m3/sec | | Starting Year: | 1981 | | Ending Year: | 1985 | | Total Years: | 5 | | Total Usable Years: | 4 | |
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| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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| 1981 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | 100.92 | 143.01 | 141.33 | -9999 |
| 1982 | 163.05 | 164.96 | 174.96 | 189.03 | 243.87 | 373.36 | 315.41 | 168.96 | 131.96 | 151.19 | 152.82 | 153 | 198.55 |
| 1983 | 157.33 | 167.13 | 179.46 | 187.83 | 184.55 | 230.99 | 290.29 | 165.69 | 129.47 | 157.4 | 218.04 | 182.85 | 187.59 |
| 1984 | 177.56 | 177.05 | 177.68 | 184.99 | 134.97 | 468.65 | 304.65 | 221.64 | 272.06 | 186.11 | 168.38 | 171.58 | 220.44 |
| 1985 | 153.69 | 155.08 | 130.62 | 144.82 | 169.24 | 114.68 | 95.46 | 91.56 | 94.87 | -9999 | -9999 | -9999 | -9999 |
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| Avg | 162.91 | 166.06 | 165.68 | 176.67 | 183.16 | 296.92 | 251.45 | 161.96 | 157.09 | 148.91 | 170.56 | 162.19 | 202.19 |
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| Std Dev | 9.09 |
7.81 |
20.31 |
18.45 |
39.38 |
134.99 |
90.5 |
46.32 |
67.98 |
30.68 |
28.87 |
16.08 |
13.66 |
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| | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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