Chicago in September
Find out everything about the water temperature in Chicago in September. Average, minimum and maximum recorded temperatures as well as daily temperature in September for the last two years. Compare the current month's water temperature data with other months of the year.
Water temperature in September
Minimum:
62.2 °F
Average:
69.2 °F
Maximum:
75.7 °F
Water temperature in Chicago in September
In the city of Chicago, the month of September is somewhat comfortable for swimming. The minimum recorded temperature during this month was 62.2°F on September 30, 2020, with an average temperature being 69.2°F and a maximum temperature reaching 75.7°F on September 1, 2021.
| Date | 10 years average | 2024 | 2023 |
|---|---|---|---|
| Sep 1 | 71.7°F | 75.3°F | 72.1°F |
| Sep 2 | 71.4°F | 74.7°F | 71.9°F |
| Sep 3 | 71.7°F | 73.8°F | 72.3°F |
| Sep 4 | 71.7°F | 73.6°F | 72.6°F |
| Sep 5 | 71.0°F | 73.5°F | 73.0°F |
| Sep 6 | 70.6°F | 73.5°F | 73.4°F |
| Sep 7 | 70.6°F | 73.2°F | 72.1°F |
| Sep 8 | 70.2°F | 72.1°F | 71.6°F |
| Sep 9 | 69.5°F | 70.8°F | 70.8°F |
| Sep 10 | 69.5°F | 70.4°F | 70.4°F |
| Sep 11 | 69.5°F | 70.3°F | 70.5°F |
| Sep 12 | 69.4°F | 70.4°F | 70.1°F |
| Sep 13 | 69.3°F | 71.1°F | 69.7°F |
| Sep 14 | 68.9°F | 71.0°F | 69.4°F |
| Sep 15 | 68.7°F | 71.4°F | 69.2°F |
| Sep 16 | 68.9°F | 71.9°F | 69.2°F |
| Sep 17 | 69.2°F | 72.3°F | 69.2°F |
| Sep 18 | 69.3°F | 72.2°F | 68.8°F |
| Sep 19 | 69.3°F | 72.0°F | 68.5°F |
| Sep 20 | 69.0°F | 72.3°F | 68.0°F |
| Sep 21 | 69.4°F | 72.0°F | 68.1°F |
| Sep 22 | 69.0°F | 72.5°F | 68.4°F |
| Sep 23 | 68.5°F | 72.2°F | 68.5°F |
| Sep 24 | 68.0°F | 70.5°F | 68.8°F |
| Sep 25 | 67.6°F | 69.9°F | 68.6°F |
| Sep 26 | 67.6°F | 69.8°F | 68.8°F |
| Sep 27 | 67.2°F | 69.7°F | 68.2°F |
| Sep 28 | 66.6°F | 69.2°F | 67.5°F |
| Sep 29 | 66.0°F | 68.5°F | 66.5°F |
| Sep 30 | 65.5°F | 68.6°F | 66.2°F |
In Chicago, there are only 12 days through the year when the water is warm enough to be comfortable for swimming.
The warmest water in Chicago was recorded on July 10, 2020, reaching a 78.0°F. While the coldest temperature occurred on January 14, 2018, dipping to 32.0°F. The average readings by season are 36.8°F in Winter, 43.0°F in Spring, 68.6°F in Summer, and 59.5°F in Autumn.
September's average temperature is a slight drop from August's average of 73.2°F. In October, the temperature is expected to decrease further, potentially averaging around 59.7°F.