Average annual temperature is 10.8 °C
Absolute maximum temperature: 36.5 °C
Absolute minimum temperature: -22.9 °C
Number of sunny days: 181 days
Number of rainy days: 163 days
Number of snow days: 21 days
Look at detailed online map of Round Lake Beach
* Weather data for Round Lake Beach United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 9.9 | 14.5 | 19.8 | 25.9 | 30.1 | 31.6 | 33.2 | 36.5 | 33.6 | 27.7 | 19.1 | 13.3 |
| Average daytime temperature (°C) | 2.4 | 4.6 | 7.0 | 15.4 | 21.4 | 26.5 | 28.0 | 27.0 | 23.8 | 16.4 | 9.2 | 5.9 |
| Average temperature (°C) | -1.2 | -0.7 | 2.1 | 9.2 | 14.9 | 20.3 | 22.7 | 22.1 | 19.3 | 12.4 | 4.8 | 2.7 |
| Average night temperature (°C) | -3.7 | -4.6 | -1.3 | 4.2 | 9.7 | 14.9 | 18.6 | 18.2 | 15.9 | 9.3 | 1.3 | 0.5 |
| Absolute minimum temperature (°C) | -22.9 | -21.3 | -11.5 | -1.6 | 1.6 | 8.1 | 14.8 | 13.0 | 10.9 | -1.6 | -10.5 | -7.4 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.5 | 10.6 | 11.9 | 13.4 | 14.6 | 15.2 | 14.9 | 13.9 | 12.5 | 11.1 | 9.8 | 9.1 |
| Daylight minimum duration (h) | 9.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 3.5 | 7.5 | 6.6 | 8.7 | 10.8 | 11.9 | 11.7 | 10.7 | 8.3 | 6.7 | 6.9 | 3.6 |
| Precipitation (mm) | 58 | 88 | 83 | 99 | 51 | 31 | 116 | 116 | 93 | 97 | 33 | 64 |
| Sunny days | 11 | 17 | 10 | 16 | 20 | 20 | 12 | 15 | 11 | 13 | 21 | 15 |
| Rainy days | 12 | 9 | 15 | 14 | 11 | 10 | 19 | 16 | 19 | 17 | 7 | 14 |
| Snow days | 8 | 2 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 2 |
The best time to visit Round Lake Beach during the most sunny months:
The largest precipitation sum in Round Lake Beach is at