Lake Springfield Water Temperature
Lake Springfield in Sangamon County, Illinois averages about 76°F at the surface in summer — warmest in Jul (~80°F) and coldest in Apr (~55°F). These are typical values by month, not a live reading.
Typical water temperature by month
Typical surface water temperature by month, from 72 field readings (2010–2018) via the EPA Water Quality Portal. Months with too few readings are left blank.
Is Lake Springfield warm enough to swim?
Pleasant for swimming — the range most people find enjoyable without a wetsuit.
Want more than temperature? Lake Springfield scored F on water quality — clarity, algae, phosphorus, depth, fish species, and swimming safety, all on one report card.
Water temperatures at nearby Illinois lakes
Summer average ~75°F
Summer average ~73°F
Summer average ~79°F
Summer average ~80°F
Summer average ~70°F
Summer average ~79°F
Explore water temperatures
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Frequently asked questions
What is the water temperature of Lake Springfield?
Lake Springfield has a typical summer surface temperature of about 76°F. It is usually warmest in July (around 80°F) and coldest in April (around 55°F). These are typical values by month from 72 EPA Water Quality Portal field readings (2010–2018), not a live reading.
When is Lake Springfield warmest?
Surface water at Lake Springfield is typically warmest in July, reaching about 80°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 Lake Springfield warm enough to swim?
At its typical summer peak of about 76°F, Lake Springfield rates as "comfortable" for swimming. Pleasant for swimming — the range most people find enjoyable without a wetsuit.
Where does this Lake Springfield 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 — 72 readings from 2 monitoring stations between 2010 and 2018. 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.