USGS Streamgage 06082200
Sun River below Willow Creek near Augusta, MT
Sun River below Willow Creek near Augusta, MT is USGS streamgage 06082200 in Montana, monitoring river discharge in hydrologic subbasin 10030104. It drains a watershed of about 814 square miles. Discharge records at this site go back to 1964. Typical flow runs near 248.3 cfs in July and 183.7 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Montana
- Drainage area
- 814 sq mi
- Gauge elevation
- 3,967 ft
- Subbasin (HUC-8)
- 10030104
- Coordinates
- 47.54714, -112.36743
- USGS site number
- 06082200
- Records begin
- 1964-06-09 (62 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 59 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| January | 64.4 | 152.2 | 245.6 | |
| February | 57.7 | 155.2 | 227.7 | |
| March | 61.8 | 159.7 | 333.9 | |
| April | 62.3 | 183.7 | 758.6 | |
| May | 168.3 | 731.5 | 3,026.1 | |
| June | 235.6 | 1,008.3 | 3,785.7 | |
| July | 170 | 248.3 | 487.1 | |
| August | 112 | 174.4 | 284.7 | |
| September | 58.6 | 115.9 | 215 | |
| October | 62.5 | 109.2 | 236 | |
| November | 72.6 | 124.1 | 249.3 | |
| December | 48.3 | 147.5 | 250.8 |
All values in cubic feet per second (cfs).