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Water temperature in Crystal Lake (IL) in January

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Is it warm enough to swim in Crystal Lake in January? Average water temperature in Crystal Lake in January is 37.2°F and therefore is not suitable for comfortable swimming. The warmest water in Crystal Lake in January is 39.2°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 Crystal Lake

Changes water temperature in Crystal Lake in January 2026, 2025

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

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Year 1:   Year 2:


Day 2026 2025
January 1 35.6°F
January 3 33.8°F
January 4 33.8°F
January 5 33.8°F

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Crystal Lake 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 January?

Want to know where the water temperature in January 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 Crystal Lake 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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