Delavan, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Delavan, a city in Walworth County, Wisconsin.
Overnight
61°F
Mostly Clear
Mostly clear, with a low around 61. South wind around 5 mph.
7-day forecast for Delavan
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 61°F | Mostly Clear | 5 mph S | 0% |
| Tuesday | 84°F | Mostly Sunny | 5 to 10 mph SW | 5% |
| Tuesday Night | 66°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 84% |
| Wednesday | 75°F | Showers And Thunderstorms | 0 to 5 mph W | 76% |
| Wednesday Night | 59°F | Chance Showers And Thunderstorms | 0 to 5 mph N | 54% |
| Thursday | 78°F | Chance Rain Showers then Mostly Sunny | 0 to 5 mph NE | 31% |
| Thursday Night | 58°F | Mostly Clear | 0 mph | 12% |
| Friday | 81°F | Mostly Sunny | 0 to 5 mph S | 2% |
| Friday Night | 61°F | Mostly Clear | 0 to 5 mph S | 6% |
| Saturday | 83°F | Mostly Sunny | 5 to 10 mph SW | 10% |
| Saturday Night | 66°F | Slight Chance Showers And Thunderstorms | 5 mph SW | 26% |
| Sunday | 84°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 26% |
| Sunday Night | 66°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 46% |
| Monday | 83°F | Chance Rain Showers | 5 mph S | 44% |
Forecast source: National Weather Service (api.weather.gov) for Delavan (42.630, -88.630). Updated through the day.
Growing snapshot for Delavan
Last spring frost
Apr 28
First fall frost
Oct 14
Growing season
168 days
Hardiness zone
5b
More local growing data for Delavan: nearby ZIP 53115 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Allens Grove
Big Foot Prairie
Bloomfield
Como
Darien
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
Williams Bay
Climate data from the nearest NOAA station, Delavan Wwtp, Wi (1.4 mi from Delavan). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.