
Is it warm enough to swim in Madison in December? Average water temperature in Madison in December is 37.2°F and therefore is not suitable for comfortable swimming. The warmest water in Madison in December is 42.8°F, and the coldest is 33.8°F. To find out the water temperature today and in the coming days, go to Current water temperature in Madison
To get an accurate forecast for the water temperature in Madison for any chosen month, compare two years within a 10 year range using the chart below.
| Day | 2025 | 2024 |
|---|---|---|
| December 1 | 39.2°F | |
| December 2 | 39.2°F | |
| December 3 | 39.2°F | |
| December 4 | 39.2°F | |
| December 5 | 37.4°F | |
| December 6 | 37.4°F | 35.6°F |
| December 7 | 35.6°F | 35.6°F |
| December 8 | 35.6°F | 35.6°F |
| December 9 | 35.6°F | 35.6°F |
| December 10 | 35.6°F | 35.6°F |
| December 11 | 35.6°F | 35.6°F |
| December 12 | 33.8°F | 33.8°F |
| December 13 | 33.8°F | 33.8°F |
| December 17 | 33.8°F | |
| December 18 | 33.8°F |
| Day | 2025 | 2024 |
|---|
You can also view information about water temperature for other months by clicking on the month button below