Argyle Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Argyle Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Argyle Lake today is 26.7°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 79°F (26°C) to 82°F (28°C). This is very warm water, allowing for extended stays without any discomfort. Swimming in these conditions will be particularly enjoyable, making it the ideal temperature range for those who want to relax in the sea. Additionally, water in this temperature range is suitable for children and elderly people, as it is comfortable for prolonged stays. It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| AUG 24 | 27.7°C | 26.1°C | |
| AUG 25 | 27.5°C | 26.1°C | |
| AUG 26 | 27.2°C | 26.1°C | |
| AUG 27 | 26.6°C | 26.1°C | |
| AUG 28 | 26.8°C | 26.1°C | |
| AUG 29 | 26.8°C | 26.1°C | |
| AUG 30 | 26.9°C | 26.1°C | |
| AUG 31 | 26.6°C | 26.1°C | |
| SEP 1 | 23.3°C | 26.5°C | |
| SEP 2 | 23.3°C | 26.4°C | |
| SEP 3 | 23.3°C | 26.2°C | |
| SEP 4 | 23.3°C | 26.0°C | |
| SEP 5 | 23.3°C | 25.9°C | |
| SEP 6 | 23.3°C | 25.7°C | |
| SEP 7 | 23.3°C | 25.5°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 1°C | 4°C | 6°C |
| February | 0°C | 3°C | 6°C |
| March | 0°C | 5°C | 10°C |
| April | 6°C | 12°C | 19°C |
| May | 14°C | 19°C | 24°C |
| June | 19°C | 24°C | 29°C |
| July | 23°C | 27°C | 31°C |
| August | 23°C | 26°C | 30°C |
| September | 21°C | 23°C | 26°C |
| October | 16°C | 19°C | 22°C |
| November | 6°C | 13°C | 18°C |
| December | 2°C | 5°C | 8°C |
Argyle Lake: Water Temperature by Location
Argyle Lake: Weather Forecast
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September 6
Location & Local Information
Argyle Lake in western Illinois experiences the full range of Midwest seasonal water temperatures. In winter the surface often approaches freezing, roughly 32–40°F (0–4°C) under ice or near-ice conditions. Spring warming typically moves the lake through about 40–65°F (4–18°C) as snowmelt and runoff mix with rising air temperatures. Peak summer surface temperatures commonly reach the mid‑60s to upper‑70s °F, roughly 65–80°F (18–27°C), with the warmest, shallow areas sometimes edging a bit higher on hot, calm days. Into early fall the lake cools again, generally settling between about 50–70°F (10–21°C) before colder weather returns.
Swimming is not a primary activity at Argyle Lake because the park does not maintain a designated, lifeguarded swim beach and the lake is managed mainly for fishing, boating and wildlife habitat. That lack of a marked swim area, combined with shoreline drop‑offs, submerged vegetation and variable temperatures, means formal swimming is discouraged; many visitors instead use canoes or kayaks, fish from the shore or boat, or wade cautiously in warm weather. Anyone choosing to enter the water should be aware of cold pockets, underwater hazards and the absence of on‑site life saving services.