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Mainline Lake, WI Weather Forecast
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Mainline Lake Weather Forecast
| TODAY | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT |
 |  |  |  | | |  |  | |  | | |
| Sunny | Partly Cloudy | Partly Sunny | Mostly Cloudy | Mostly Cloudy | Mostly Cloudy | Chance of Showers | Chance of Showers | Chance of Showers | Snow Showers | Mostly Cloudy | Chance of Showers |
| Hi: 69°FHi: 21°C | Lo: 45°FLo: 7°C | Hi: 70°FHi: 21°C | Hi: 70°FHi: 21°C Lo: 49°FLo: 9°C | Hi: 70°FHi: 21°C Lo: 49°FLo: 9°C | Lo: 50°FLo: 10°C | Hi: 59°FHi: 15°C | Lo: 39°FLo: 4°C | Hi: 49°FHi: 9°C | Lo: 31°FLo: -1°C | Hi: 49°FHi: 9°C | Lo: 31°FLo: -1°C |
| POP: 40% | POP: 30% | POP: 40% | POP: 30% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 608 AM CDT Thu Oct 22 2026 
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Issued: 632 AM CDT Thu Oct 22 2026
Key Messages
- Dense fog late tonight into Thursday morning, locally dropping visibilities below 1/2 mile. More fog possible early Friday.
- Mild into the weekend with inland high temperatures warming into the middle 60s to lower 70s.
- Rain chances return Saturday night into Monday (20-40%). Additional chances for rain linger through much of next week.
- Cooler next week, with highs mainly in the 50s.
Discussion
... Issued at 1113 PM CDT Wed Oct 21 2026
Fog trends through Friday morning...Cold front over n...