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A wave breaking on the cobble beach of Lake Superior at Duluth, Minnesota, with a wooded headland beyond

Kohlman Lake Water Temperature

Kohlman Lake in Ramsey County, Minnesota typically sits around 51°F at the surface in October — warmest in Jul (~75°F) and coldest in Jan (~36°F). That is a typical value for the month, not a live reading.

Typical in October
51°F
Cold
Summer average
73°F
Warmest (Jul)
75°F
Coldest (Jan)
36°F

Typical water temperature by month

36°
Jan
Feb
44°
Mar
48°
Apr
58°
May
71°
Jun
75°
Jul
73°
Aug
68°
Sep
51°
Oct
39°
Nov
Dec

Column height runs from this lake’s coldest month (36°F) to its warmest (75°F).

Typical surface water temperature by month, from 564 field readings (2010–2025) via the EPA Water Quality Portal. Months with too few readings are left blank.

Is Kohlman Lake warm enough to swim?

At its summer peak (~73°F): Comfortable

Pleasant for swimming — the range most people find enjoyable without a wetsuit.

Want more than temperature? Kohlman Lake water quality: clarity, algae, phosphorus, depth, fish species, and current advisories, all on one page.

Where to stay near Kohlman Lake

Planning a swim or lake trip? Compare cabins, lodges, and vacation rentals near Kohlman Lake — live availability and prices. Switch the map to Satellite to see the lake and how close each stay is to the water.

Top-rated places to stay near Kohlman Lake

Prices for Oct 16–18, 4 adults. Change dates on the map below.

Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.

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Frequently asked questions

What is the water temperature of Kohlman Lake?

Kohlman Lake typically sits around 51°F at the surface in October, from 564 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.

When is Kohlman Lake warmest?

Surface water at Kohlman Lake is typically warmest in July, reaching about 75°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 Kohlman Lake warm enough to swim?

At its typical summer peak of about 73°F, Kohlman Lake rates as "comfortable" for swimming. Pleasant for swimming — the range most people find enjoyable without a wetsuit.

Where does this Kohlman 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 — 564 readings from 5 monitoring stations between 2010 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.