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Water temperature in Crystal Lake (IL) in July

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Is it warm enough to swim in Crystal Lake in July? Average water temperature in Crystal Lake in July is 72.7°F and therefore suitable for comfortable swimming. The warmest water in Crystal Lake in July is 78.8°F, and the coldest is 68°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 July 2025, 2024

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.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024
July 177°F69.8°F
July 277°F69.8°F
July 378.8°F69.8°F
July 478.8°F69.8°F
July 577°F69.8°F
July 677°F71.6°F
July 775.2°F71.6°F
July 875.2°F71.6°F
July 975.2°F71.6°F
July 1073.4°F71.6°F
July 1173.4°F 
July 1273.4°F 
July 1373.4°F 
July 1475.2°F 
July 1573.4°F 
Day 2025 2024
July 1673.4°F 
July 1773.4°F 
July 1873.4°F 
July 1971.6°F71.6°F
July 2071.6°F 
July 2171.6°F69.8°F
July 2275.2°F69.8°F
July 2375.2°F69.8°F
July 2475.2°F69.8°F
July 2577°F69.8°F
July 2678.8°F69.8°F
July 2778.8°F69.8°F
July 2878.8°F71.6°F
July 2977°F71.6°F
July 3075.2°F73.4°F
July 3173.4°F73.4°F

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 July?

Want to know where the water temperature in July 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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