Is it colder to live by a lake?

It's all part of what makes weather, the unequal heating of the Earth's surface. That is why over the next couple of months you will hear us often say, “cooler by the lake.” Then again, as boaters and people who enjoy our beautiful waters know, it is always cooler by the lake.



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Its relatively warm water (warm compared with colder wintertime air temperatures) keeps temperatures over the lake and at the lakefront higher than inland readings. In the summer, however, lake water temperatures are usually cooler than inland air temperatures, and daytime readings at the lakefront will be lower.

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The Profundal Zone or Hypolimnion (cold water region) can be found below the Euphotic Zone. This zone is located under the thermocline where the sunlight does not penetrate the water. Again, the size of this zone depends on the age and water clarity of the pond or lake.

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The massive Lakes act like heat sinks that moderate the temperatures of the surrounding land, cooling the summers and warming the winters. The lakes also act like giant humidifiers, increasing the moisture content of the air. In the winter, this moisture contributes to heavy snowfall known as “lake effect” snow.

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During the early morning hours, the land and the water start out at roughly the same temperature. On a calm morning, a given pressure surface will be at the same height above both the land and water. A few hours later, the sun's energy begins to warm the land more rapidly than the water.

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Lakes have layers Water temperatures also play a role in water density. Warm water is less dense meaning it is lighter and stays toward the top of the lake. The colder, heavier water is found at the bottom.

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