Monthly Chicago water temperature chart
The bar chart below shows the average monthly sea temperatures at Chicago over the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 3.9 | 2.7 | 3.2 | 4.9 | 7.1 | 14.1 | 21.5 | 23.2 | 20.3 | 14.9 | 9.6 | 5.7 |
| °F | 39 | 36.9 | 37.8 | 40.8 | 44.8 | 57.4 | 70.7 | 73.8 | 68.5 | 58.8 | 49.3 | 42.3 |
Monthly average max / min water temperatures
The graph below shows the range of monthly water temperatures over several years.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min °C | 3 | 1.4 | 1.9 | 2.5 | 4.3 | 7.8 | 18.1 | 21.6 | 17.5 | 11.5 | 6.9 | 3.1 |
| Max °C | 4.8 | 4 | 4.5 | 7.4 | 9.9 | 20.5 | 24.9 | 24.9 | 23.2 | 18.4 | 12.3 | 8.4 |
| Min °F | 38.1 | 35.6 | 36.5 | 38.4 | 42 | 51.1 | 67.3 | 72.2 | 65.7 | 55.4 | 46.6 | 39.7 |
| Max °F | 39.9 | 38.2 | 39.1 | 43.3 | 47.6 | 63.8 | 74.1 | 75.5 | 71.4 | 62.3 | 52 | 45 |