Mudro Lake Water Temperature
Mudro Lake in St. Louis County, Minnesota averages about 49°F at the surface in summer — warmest in Jul (~50°F) and coldest in Jun (~47°F). These are typical values by month, not a live reading.
Typical water temperature by month
Typical surface water temperature by month, from 162 field readings (2019–2025) via the EPA Water Quality Portal. Months with too few readings are left blank.
Is Mudro Lake warm enough to swim?
Cold-water shock is a real risk below 50°F — unprotected swimming is unsafe and even strong swimmers can lose muscle control within minutes.
Want more than temperature? Mudro Lake scored D on water quality — clarity, algae, phosphorus, depth, fish species, and swimming safety, all on one report card.
Water temperatures at nearby Minnesota lakes
Summer average ~56°F
Summer average ~73°F
Summer average ~49°F
Summer average ~64°F
Summer average ~67°F
Summer average ~65°F
Explore water temperatures
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Frequently asked questions
What is the water temperature of Mudro Lake?
Mudro Lake has a typical summer surface temperature of about 49°F. It is usually warmest in July (around 50°F) and coldest in June (around 47°F). These are typical values by month from 162 EPA Water Quality Portal field readings (2019–2025), not a live reading.
When is Mudro Lake warmest?
Surface water at Mudro Lake is typically warmest in July, reaching about 50°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 Mudro Lake warm enough to swim?
At its typical summer peak of about 49°F, Mudro Lake rates as "very cold" for swimming. Cold-water shock is a real risk below 50°F — unprotected swimming is unsafe and even strong swimmers can lose muscle control within minutes.
Where does this Mudro 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 — 162 readings from 1 monitoring station between 2019 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.