Round Lake weather
At 6:30 PM local time it was cloudy and 13°C (55°F). Light rain for 3 of the next 24 hours (under 1 mm/h, 0.7 mm total) — cloudy, but fine to be out. Best months for weather: May–Sep. Round Lake sits 242 m (794 ft) above sea level, which keeps it cooler than the coast. Below: today's sky, the hour-by-hour rain chance and the 16-day forecast for Round Lake, Illinois, United States.
Current conditions
- Clouds
- 100%
- Chance of rain
- 5%
- Rain
- 0.0 mm/h
Hourly Forecast
Light rain for 3 of the next 24 hours (under 1 mm/h, 0.7 mm total) — cloudy, but fine to be out
Daily Forecast
Best Time to Visit
Peak season May–SepOff season Nov–Mar
About Round Lake weather
Is it raining in Round Lake right now?
No. It’s cloudy and 13° right now. Light rain for 3 of the next 24 hours (under 1 mm/h, 0.7 mm total) — cloudy, but fine to be out.
What’s the weather like in Round Lake this week?
Over the next 7 days, expect highs of 10–20° and lows of 7–15°. Rain is likely on 5 of 7 days (Monday, Tuesday, Wednesday, Thursday, Friday). The driest day looks like Sunday.
Has it been raining in Round Lake lately?
Barely. The past 7 days were mostly dry, with 0.0 mm of rain in total.
What should I pack for Round Lake?
For the coming week, bring an umbrella or rain jacket and a warm layer for the evenings.
Round Lake weather by month
When is the best time to visit Round Lake?
Based on weather alone, the best time to visit Round Lake is May–Sep, according to NASA's 2001–2025 climate averages. Nov–Mar tends to be the least pleasant. Average highs run from -2°C (28°F) in January to 28°C (82°F) in July.
What is the rainiest month in Round Lake?
June is the wettest month, with about 123 mm (4.8 in) of rain on average. January is the driest, with about 42 mm (1.7 in).
What is the hottest month in Round Lake?
July is the warmest, with average highs of 28°C (82°F) and lows of 18°C (64°F). January is the coolest, with highs of -2°C (28°F) and lows of -10°C (13°F).
Does Round Lake have a rainy season?
Not a strong one. No month averages more than 150 mm of rain; the wettest is June at about 123 mm (4.8 in).
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), forecast and current conditions from Open-Meteo. Page updated . How we rate months