Williams Bay, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Williams Bay, a village in Walworth County, Wisconsin.
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 for Williams Bay
| 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) for Williams Bay (42.579, -88.546). Updated through the day.
Growing snapshot for Williams Bay
Last spring frost
Apr 25
First fall frost
Oct 21
Growing season
179 days
Hardiness zone
5b
More local growing data for Williams Bay: nearby ZIP 53191 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Allens Grove
Big Foot Prairie
Bloomfield
Como
Darien
Delavan
Delavan Lake
East Troy
Elkhorn
Fontana-on-Geneva Lake
Genoa City
Lake Geneva
Lake Ivanhoe
Lake Lorraine
Lauderdale Lakes
Lyons
Powers Lake
Sharon
Springfield
Turtle Lake
Walworth
Whitewater
Climate data from the nearest NOAA station, Lake Geneva Wwtp, Wi (6.3 mi from Williams Bay). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.