Weather WorldRound Lake, IL Weather Forecast
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Round Lake Weather Forecast
| TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY |
 |  |  |  | |  | | |  | | | |
| Partly Cloudy | Mostly Cloudy | Mostly Cloudy | Clearing | Mostly Cloudy | Chance of Showers | Partly Cloudy | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers |
| Lo: 45°FLo: 7°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 71°FHi: 22°C | Lo: 55°FLo: 13°C | Hi: 71°FHi: 22°C | Lo: 50°FLo: 10°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 70°FHi: 21°C | Lo: 55°FLo: 13°C | Hi: 70°FHi: 21°C |
| POP: 30% | POP: 40% | POP: 50% | POP: 30% | POP: 40% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 705 PM CDT Mon Oct 26 2026 
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Issued: 619 PM CDT Mon Oct 26 2026
Key Messages
- Some fog is possible tonight, especially south of I-80, with some threat for locally dense fog.
- Above to much above average temperatures expected to continue through the upcoming weekend.
- While not a wash out, there will be some periodic chances for showers and perhaps isolated thunderstorms at times late Wednesday night through the upcoming weekend.
Discussion
... Issued at 112 PM CDT Mon Oct 26 2026
Weak and somewhat ill-defined frontal boundary has slowed and becoming nearly stationa...