Split Rock Lake, IL Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Split Rock Lake Weather Forecast
| REST OF TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY |
| Patchy Fog | Patchy Fog | Chance of Showers | Showers | Chance of T-Storm | Chance of T-Storm | Showers | Chance of Showers | Partly Cloudy | Partly Cloudy | Mostly Cloudy | Partly Cloudy |
| Lo: 50°FLo: 10°C | Hi: 79°FHi: 26°C | Lo: 65°FLo: 18°C | Hi: 75°FHi: 24°C | Lo: 69°FLo: 21°C | Hi: 75°FHi: 24°C | Lo: 59°FLo: 15°C | Hi: 69°FHi: 21°C | Lo: 50°FLo: 10°C | Hi: 69°FHi: 21°C | Lo: 50°FLo: 10°C | Hi: 69°FHi: 21°C |
| POP: 40% | POP: 70% | POP: 50% | POP: 90% | POP: 90% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 120 AM CDT Tue Sep 29 2026 

Split Rock Lake Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Split Rock Lake Weather Map
Split Rock Lake Quick Facts
Split Rock Lake Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 1259 AM CDT Tue Sep 29 2026
Key Messages
- More fog possible late tonight into early Tuesday morning, some may become locally dense.
- Widespread rain is likely across the region in the late Wednesday through Thursday night time frame.
Discussion
... Issued at 240 PM CDT Mon Sep 28 2026
Surface high pressure remains dominant across the Great Lakes region tonight into Tuesday. Light winds and mainly clear skies tonight will facilitate additional fog development (locally dense in spots) late tonight into early Tuesday morning as air...
Weather World