Little Trout Lake Water Temperature
Little Trout Lake in St. Louis County, Minnesota averages about 53°F at the surface in summer — warmest in Jul (~54°F) and coldest in Jun (~51°F). These are typical values by month, not a live reading.
Typical water temperature by month
Typical surface water temperature by month, from 921 field readings (2010–2024) via the EPA Water Quality Portal. Months with too few readings are left blank.
Is Little Trout Lake warm enough to swim?
Wetsuit territory. Brief exposure is tolerable but prolonged swimming without protection risks hypothermia.
Want more than temperature? Little Trout Lake scored A on water quality — clarity, algae, phosphorus, depth, fish species, and swimming safety, all on one report card.
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Frequently asked questions
What is the water temperature of Little Trout Lake?
Little Trout Lake has a typical summer surface temperature of about 53°F. It is usually warmest in July (around 54°F) and coldest in June (around 51°F). These are typical values by month from 921 EPA Water Quality Portal field readings (2010–2024), not a live reading.
When is Little Trout Lake warmest?
Surface water at Little Trout Lake is typically warmest in July, reaching about 54°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 Little Trout Lake warm enough to swim?
At its typical summer peak of about 53°F, Little Trout Lake rates as "cold" for swimming. Wetsuit territory. Brief exposure is tolerable but prolonged swimming without protection risks hypothermia.
Where does this Little Trout 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 — 921 readings from 2 monitoring stations between 2010 and 2024. 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.