BirdTrout
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USGS Gauge 04136500 — Au Sable River at Mio, Michigan
Water temperature 56.8 °F. 2.8 °F below the five-year normal for this date. 916 cfs.
Open in BirdTrout44.66001, -84.13112 · 929 ft elevation · 1,212 sq mi drainage. This gauge on USGS Water Data →
Right now
- 56.8 °F Water temperature
- 916 Cubic ft / second
- -2.8 °F vs 5-yr normal
- 63.1 °FThis date last year
Live from USGS — the numbers above are current rather than whenever the page was written. The normal is the mean of every reading at this gauge within 3 days of this calendar date in the previous years of record — 31 readings, averaging 62.2 °F.
The last thirty days
Daily means from USGS. A gap in the line is a gap in the record.
The record at this gauge
| Month | Mean temp | Mean flow |
|---|---|---|
| Jan | 33.8 °F | 805 |
| Feb | 34.0 °F | 774 |
| Mar | 37.8 °F | 1,111 |
| Apr | 46.7 °F | 1,709 |
| May | 58.1 °F | 1,189 |
| Jun | 66.4 °F | 959 |
| Jul | 69.9 °F | 888 |
| Aug | 67.4 °F | 789 |
| Sep | 61.9 °F | 749 |
| Oct | 52.4 °F | 766 |
| Nov | 41.5 °F | 795 |
| Dec | 35.1 °F | 839 |
- 74.3 °FWarmest, 2025-08-12
- 32.2 °FColdest, 2024-01-15
- 6,120Highest flow, 2026-04-14
- 473Lowest flow, 2025-01-21
Computed here from the last 5 years of USGS daily values at this gauge — 1,825 temperature days over 5.0 years and 1,826 flow days. These are not USGS-published normals, and a month with fewer than 20 days of record is left blank rather than averaged.
What this gauge predicts
This is one of the gauges this site fits an air-to-water model against, which is how the map colours water that has no gauge on it. July mean 70.03 °F; the fit explains 87% of the variance with a typical error of 2.157 °F.
The water it stands in
Au Sable River, classified Cold transitional large river by MDNR VSEC — the nearest reach carrying that classification is 0.05 mi from the gauge.
Snapped to NHD reach Au Sable River (60001900001225), 61.0 m away. That join is what lets the app paint this gauge's reading onto the reach it measures.
Other gauges near this one
- Nb Au Sable River at Kelloggs Br near Lovells, MI 14.7 mi · USGS 04135800
- Au Sable River near Mc Kinley, MI 14.8 mi · USGS 04136900
- South Branch Au Sable River near Luzerne, MI 16.2 mi · USGS 04135700
Dams near this gauge
- Mio 0.1 mi · 38 ft
A dam upstream of a gauge moves what the gauge reads. A hydro dam moves it on a release schedule this page does not know.
Access near this gauge
- Au Sable River At Big Creek Township Dam Access 0.1 mi · walk in
- M-33 Roadside Park 0.2 mi · boat launch · Au Sable River
- Mio Pond T-Dock 0.3 mi · boat launch · Mio Dam Pond - Au Sable River
- Mio Pond State Forest Campground 0.8 mi · boat launch · Mio Dam Pond - Au Sable River
- Au Sable River - Louds Rest 1.2 mi · walk in
- Au Sable River - U.S. Forest Service Forest Road 4366 - Loop And River Dune Campground 1.7 mi · walk in
Fly shops nearby
- Ausable River Outfitters0.4 mi · Mio
- Fuller's North Branch Outing Club19.9 mi · Lovells
- Gates Au Sable Lodge21.0 mi · Grayling
- Village Outfitters25.2 mi · Roscommon