Williams Bay, WI Weather & Growing Conditions
This Afternoon
69°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy, with a high near 69. East wind around 10 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Chance Rain Showers | 10 mph E | 35% |
| Tonight | 60°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 10 mph E | 86% |
| Saturday | 73°F | Showers And Thunderstorms | 5 to 10 mph SE | 93% |
| Saturday Night | 60°F | Showers And Thunderstorms | 5 to 10 mph NE | 75% |
| Sunday | 66°F | Rain Showers Likely | 10 to 15 mph NE | 56% |
| Sunday Night | 53°F | Chance Rain Showers | 10 to 15 mph NE | 34% |
| Monday | 62°F | Chance Rain Showers | 10 to 15 mph NE | 28% |
| Monday Night | 49°F | Chance Rain Showers | 5 to 15 mph NE | 28% |
| Tuesday | 61°F | Slight Chance Rain Showers | 10 to 15 mph NE | 17% |
| Tuesday Night | 49°F | Mostly Cloudy | 5 to 10 mph NE | 12% |
| Wednesday | 63°F | Partly Sunny | 5 to 10 mph NE | 8% |
| Wednesday Night | 49°F | Partly Cloudy | 0 to 5 mph NE | 4% |
| Thursday | 66°F | Partly Sunny | 0 to 5 mph NE | 4% |
| Thursday Night | 50°F | Partly Cloudy | 0 to 5 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Williams Bay, WI
Last spring frost
Apr 25
First fall frost
Oct 21
Growing season
179 days
Hardiness zone
5b
Explore more for Williams Bay, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Lake Geneva Wwtp, Wi (6.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.