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Water temperature in Shelbyville (IL) in September

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Is it warm enough to swim in Shelbyville in September? Average water temperature in Shelbyville in September is 71.2°F and therefore suitable for comfortable swimming. The warmest water in Shelbyville in September is 78.8°F, and the coldest is 59°F. To find out the water temperature today and in the coming days, go to Current water temperature in Shelbyville

Changes water temperature in Shelbyville in September 2025, 2024

To get an accurate forecast for the water temperature in Shelbyville for any chosen month, compare two years within a 10 year range using the chart below.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024
September 169.8°F73.4°F
September 268°F71.6°F
September 368°F71.6°F
September 466.2°F71.6°F
September 564.4°F68°F
September 664.4°F66.2°F
September 764.4°F66.2°F
September 864.4°F66.2°F
September 966.2°F68°F
September 1066.2°F66.2°F
September 1168°F64.4°F
September 1271.6°F66.2°F
September 1373.4°F69.8°F
September 1475.2°F71.6°F
September 1577°F71.6°F
Day 2025 2024
September 1677°F71.6°F
September 1777°F73.4°F
September 1877°F73.4°F
September 1975.2°F75.2°F
September 2073.4°F73.4°F
September 2173.4°F73.4°F
September 2271.6°F71.6°F
September 2369.8°F71.6°F
September 2469.8°F69.8°F
September 2569.8°F69.8°F
September 2669.8°F68°F
September 2769.8°F66.2°F
September 2869.8°F66.2°F
September 2969.8°F66.2°F
September 3069.8°F66.2°F

Average water temperature in Shelbyville in September over a decade

20162017201820192020
72.7°F74.7°F70.3°F
20212022202320242025
72.7°F68.9°F71.2°F69.6°F70.3°F

Shelbyville water temperature during other months:

You can also view information about water temperature for other months by clicking on the month button below

Where is the warm sea water in September?

Want to know where the water temperature in September is good for swimming? Select the continent of interest, the day of the month and the required water temperature

Region
Date (day and month)
Water temperature: min 60°F
 Average temperature  Maximum temperature

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[1] - The "Blue Flag" is awarded to beaches which fulfill a number of criteria, including: the quality of the bathing water, which must be in accordance with the relevant European Union Directive environmental education and information and beach area management and safety.

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Our report for Shelbyville is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.

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