Chicago Sea Temperature in September

Looking to find out what the average sea water temperature in Chicago is for September? Find out what the lowest, highest, and average water temperatures are for Chicago over the past 10 years.

Average water temperature in Chicago for September

The average, high, and low temperatures below should help you if you can swim in the water in Chicago in September.

20.16° C

(68.29° F)

  • highest: 23.97° C (75.15° F)
  • lowest: 12.97° C (55.35° F)

Water at this temperature is very pleasant to swim in and if you tend to wear a wetsuit when swimming, you might consider removing it now to avoid the body overheating.

Water temperature range by day in September in Chicago

The chart below shows the range of low and high temperatures by day for the month of September in Chicago.

Water temperatures for September in Chicago in recent years

Day 2024 2023 2022 2021
1 0° C 21.71° C 22.11° C 23.56° C
2 0° C 22.04° C 21.9° C 23.32° C
3 0° C 22.39° C 22.2° C 22.93° C
4 0° C 22.92° C 22.01° C 22.38° C
5 0° C 23.1° C 21.59° C 22.29° C
6 0° C 22.73° C 21.61° C 21.86° C
7 0° C 22.28° C 21.72° C 21.61° C
8 0° C 21.88° C 21.83° C 21.47° C
9 0° C 21.7° C 21.91° C 21.24° C
10 0° C 21.67° C 21.99° C 21.22° C
11 0° C 21.58° C 22.02° C 21.2° C
12 0° C 21.32° C 21.28° C 21.31° C
13 0° C 21.18° C 20.58° C 21.34° C
14 0° C 21.1° C 20.48° C 21.41° C
15 0° C 21.1° C 20.46° C 21.3° C
16 0° C 21.03° C 20.69° C 21.3° C
17 0° C 20.81° C 20.89° C 21.35° C
18 0° C 20.69° C 20.94° C 21.38° C
19 0° C 20.6° C 21.02° C 21.5° C
20 0° C 20.52° C 21.03° C 21.5° C
21 0° C 20.5° C 21.1° C 20.94° C
22 0° C 20.49° C 20.69° C 19.75° C
23 0° C 20.61° C 20.21° C 18.3° C
24 0° C 20.61° C 19.65° C 18.3° C
25 0° C 20.49° C 19.21° C 18.61° C
26 0° C 20.32° C 18.91° C 18.43° C
27 0° C 19.4° C 18.61° C 18.53° C
28 0° C 19.1° C 18.02° C 18.49° C
29 0° C 19.37° C 17.64° C 18.58° C
30 0° C 19.5° C 17.5° C 18.72° C

Water temperature in September for locations near Chicago

Xiaomo

China, Asia

0.33 miles away

Ohio Street Beach

United States, North America

1.37 miles away

Vardan

Russia, Asia

7.25 miles away

Evanston

United States, North America

11.91 miles away

Wilmette

United States, North America

14.24 miles away

Whiting

United States, North America

15.38 miles away

Data source and citation

Raw data for the calculations made to find the sea surface temperature in Chicago comes from the National Oceanic and Atmospheric Administration (NOAA) and their 1/4° daily Optimum Interpolation Sea Surface Temperature.

The water temperature data is constructed by combining observations from different platforms (satellites, ships, buoys, and Argo floats) on a regular global grid. A spatially complete sea surface temperature map is then built by interpolating to fill in gaps in the data.

If you'd like to use any of the information above in the format it is presented, please use the citation tool below.

  • "Chicago Sea Temperature in September". SeaTemperatures.net. Accessed on June 2, 2024. http://seatemperatures.net/north-america/united-states/chicago-september-temperature/.

  • "Chicago Sea Temperature in September". SeaTemperatures.net, http://seatemperatures.net/north-america/united-states/chicago-september-temperature/. Accessed 2 June, 2024

  • Chicago Sea Temperature in September. SeaTemperatures.net. Retrieved from http://seatemperatures.net/north-america/united-states/chicago-september-temperature/.