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Round Lake Heights climate
Typical historical weather for Round Lake Heights, United States, averaged across 10 years of hourly climate data. Pick a date for a specific day.
Want today's actual conditions instead? See the current forecast for Round Lake Heights.
Annual average
9.8°C
across all months
Warmest month
25.2°C
Jul average high
Coolest month
-6.2°C
Jan average low
Annual rainfall
981mm
total per year
Monthly averages
Average daily high/low temperature (band) and monthly rainfall (bars).
● Avg high● Avg low▮ Rainfall
Records on file
Hottest day
33.8°C
23 August 2023
Coldest day
-28.3°C
31 January 2019
Wettest day
72.8mm
17 May 2020
Windiest day
11.2m/s
26 November 2025
See the detail: Round Lake Heights on 17 May 2020.