Lake Monona Water Level History
Thirty-day lake-level chart, recent highs and lows, net change and daily summaries from the matched USGS station.
Lake Monona water-level chart
Source: U.S. Geological Survey monitoring station ↗. Recent measurements may be provisional.
What has Lake Monona been doing?
Across the available 30-day series, Lake Monona is rising overall. The measured range runs from 844.77 ft to 845.33 ft, with a net change of +0.05 ft.
Lake levels can respond to rainfall, watershed inflow, dam and hydropower operations, seasonal target elevations, evaporation and downstream release requirements. This page reports what the matched sensor measured; it does not infer why an operator changed a reservoir.
Recent daily levels
| Date | Low | Average | High |
|---|---|---|---|
| Oct 7 | 844.93 ft | 844.95 ft | 844.96 ft |
| Oct 6 | 844.94 ft | 844.98 ft | 845.01 ft |
| Oct 5 | 845.00 ft | 845.03 ft | 845.05 ft |
| Oct 4 | 845.03 ft | 845.06 ft | 845.08 ft |
| Oct 3 | 845.08 ft | 845.11 ft | 845.13 ft |
| Oct 2 | 845.13 ft | 845.15 ft | 845.16 ft |
| Oct 1 | 844.95 ft | 845.09 ft | 845.16 ft |
| Sep 30 | 844.94 ft | 844.96 ft | 844.97 ft |
| Sep 29 | 844.96 ft | 844.98 ft | 845.00 ft |
| Sep 28 | 845.00 ft | 845.02 ft | 845.05 ft |
| Sep 27 | 845.05 ft | 845.07 ft | 845.10 ft |
| Sep 26 | 845.09 ft | 845.12 ft | 845.16 ft |
| Sep 25 | 845.15 ft | 845.17 ft | 845.21 ft |
| Sep 24 | 845.19 ft | 845.21 ft | 845.23 ft |
| Sep 23 | 845.23 ft | 845.25 ft | 845.30 ft |
| Sep 22 | 845.29 ft | 845.30 ft | 845.32 ft |
| Sep 21 | 845.28 ft | 845.30 ft | 845.33 ft |
| Sep 20 | 845.17 ft | 845.26 ft | 845.30 ft |
| Sep 19 | 844.80 ft | 845.07 ft | 845.18 ft |
| Sep 18 | 844.79 ft | 844.81 ft | 844.85 ft |
| Sep 17 | 844.80 ft | 844.81 ft | 844.84 ft |
| Sep 16 | 844.81 ft | 844.83 ft | 844.84 ft |
| Sep 15 | 844.77 ft | 844.83 ft | 844.84 ft |
| Sep 14 | 844.78 ft | 844.80 ft | 844.81 ft |
| Sep 13 | 844.80 ft | 844.81 ft | 844.82 ft |
| Sep 12 | 844.81 ft | 844.83 ft | 844.84 ft |
| Sep 11 | 844.83 ft | 844.85 ft | 844.86 ft |
| Sep 10 | 844.85 ft | 844.86 ft | 844.87 ft |
| Sep 9 | 844.86 ft | 844.87 ft | 844.89 ft |
| Sep 8 | 844.86 ft | 844.88 ft | 844.89 ft |
Lake Monona level-history FAQ
How has Lake Monona water level changed over the last 30 days?
Across the available 30-day sensor series, the net change is +0.05 ft and the overall direction is rising.
What was the highest Lake Monona level in the last 30 days?
The highest reading in the available 30-day series is 845.33 ft.
What was the lowest Lake Monona level in the last 30 days?
The lowest reading in the available 30-day series is 844.77 ft.
Are historical USGS lake readings final?
Not always. Recent readings may be marked provisional and can be revised by the source agency after quality review.