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
70°F
Light Rain
Rain and a slight chance of thunderstorms. Cloudy. High near 70, with temperatures falling to around 65 in the afternoon. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Williams Bay
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Light Rain | 15 mph S | 81% |
| Tonight | 56°F | Light Rain | 10 to 15 mph S | 88% |
| Wednesday | 61°F | Light Rain Likely | 10 to 15 mph S | 73% |
| Wednesday Night | 46°F | Chance Light Rain | 10 mph SW | 30% |
| Thursday | 54°F | Light Rain Likely | 5 to 10 mph W | 63% |
| Thursday Night | 39°F | Chance Light Rain | 5 to 10 mph NW | 52% |
| Friday | 49°F | Slight Chance Light Rain then Mostly Cloudy | 5 to 10 mph N | 20% |
| Friday Night | 33°F | Partly Cloudy | 0 to 5 mph N | 2% |
| Saturday | 51°F | Mostly Sunny | 0 to 5 mph W | 2% |
| Saturday Night | 33°F | Partly Cloudy | 0 to 5 mph W | 7% |
| Sunday | 56°F | Mostly Sunny then Slight Chance Light Rain | 5 to 10 mph W | 18% |
| Sunday Night | 35°F | Mostly Clear | 0 to 5 mph W | 7% |
| Monday | 59°F | Sunny | 5 to 10 mph SW | 2% |
| Monday Night | 39°F | Mostly Clear | 5 to 10 mph W | 2% |
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 Nov 4, 2026.