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Firefly Lake, WI Weather Forecast
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Firefly Lake Weather Forecast
| TODAY | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT |
 |  | |  | |  |  |  | | |  | |
| Clearing | Patchy Fog | Clearing | Partly Cloudy | Partly Cloudy | Mostly Cloudy | Mostly Cloudy | Chance of Showers | Partly Cloudy | Partly Cloudy | Chance of Showers | Patchy Fog |
| Hi: 69°FHi: 21°C | Lo: 35°FLo: 2°C | Hi: 65°FHi: 18°C | Lo: 41°FLo: 5°C | Hi: 65°FHi: 18°C | Hi: 69°FHi: 21°C Lo: 50°FLo: 10°C | Hi: 69°FHi: 21°C Lo: 50°FLo: 10°C | Lo: 45°FLo: 7°C | Hi: 55°FHi: 13°C Lo: 31°FLo: -1°C | Hi: 55°FHi: 13°C Lo: 31°FLo: -1°C | Hi: 49°FHi: 9°C | Lo: 29°FLo: -2°C |
| POP: 40% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 548 AM CDT Wed Oct 21 2026 
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Issued: 630 AM CDT Wed Oct 21 2026
Key Messages
- Dense fog overnight into Wednesday morning across east-central Wisconsin and areas west of Green Bay, locally dropping visibilities below 1/2 mile. More fog possible early Thursday and early Friday.
- Dry and mild through Saturday afternoon with inland high temperatures warming into the upper 60s to lower 70s. Warmest days Wednesday and Saturday.
- A 20 to 30 percent chance of light rain showers Saturday night into Sunday across especially northern Wisconsin. Chances for at least some sh...