Coon Lake Water Temperature
Coon Lake in Anoka County, Minnesota averages about 81°F at the surface in summer — warmest in Jul (~85°F) and coldest in May (~64°F). These are typical values by month, not a live reading.
Typical water temperature by month
Typical surface water temperature by month, from 65 field readings (2022–2025) via the EPA Water Quality Portal. Months with too few readings are left blank.
Is Coon Lake warm enough to swim?
Very comfortable for swimming. Warm surface water can also favor blue-green algae in nutrient-rich lakes, so check for advisories before you go in.
Want more than temperature? Coon Lake scored C on water quality — clarity, algae, phosphorus, depth, fish species, and swimming safety, all on one report card.
Water temperatures at nearby Minnesota lakes
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Frequently asked questions
What is the water temperature of Coon Lake?
Coon Lake has a typical summer surface temperature of about 81°F. It is usually warmest in July (around 85°F) and coldest in May (around 64°F). These are typical values by month from 65 EPA Water Quality Portal field readings (2022–2025), not a live reading.
When is Coon Lake warmest?
Surface water at Coon Lake is typically warmest in July, reaching about 85°F. Lake surface temperature lags air temperature by several weeks, so the warmest water usually arrives in mid-to-late summer even though the hottest air can come earlier.
Is Coon Lake warm enough to swim?
At its typical summer peak of about 81°F, Coon Lake rates as "warm" for swimming. Very comfortable for swimming. Warm surface water can also favor blue-green algae in nutrient-rich lakes, so check for advisories before you go in.
Where does this Coon Lake water temperature data come from?
Every temperature on this page is a typical (climatological) value computed from real surface-water field readings collected by state and federal agencies and published through the EPA Water Quality Portal — 65 readings from 1 monitoring station between 2022 and 2025. They describe what is typical for each month, not the temperature right now.
About this data
Water temperatures are a climatology — the typical value for each month, averaged from real surface-water field readings collected by state and federal agencies and published through the EPA Water Quality Portal. They tell you what to expect, not the temperature at this moment. Actual conditions vary with recent weather, depth, and time of day.