Delavan Lake, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Delavan Lake, a community in Walworth County, Wisconsin.
Today
83°F
Mostly Sunny
Mostly sunny, with a high near 83. Southwest wind 0 to 10 mph.
7-day forecast for Delavan Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Mostly Sunny | 0 to 10 mph SW | 5% |
| Tonight | 66°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 84% |
| Wednesday | 74°F | Showers And Thunderstorms | 0 to 5 mph W | 76% |
| Wednesday Night | 60°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 to 5 mph NW | 57% |
| Thursday | 78°F | Chance Rain Showers then Mostly Sunny | 0 to 5 mph NE | 32% |
| Thursday Night | 58°F | Mostly Clear | 0 mph | 11% |
| Friday | 81°F | Mostly Sunny | 0 to 5 mph S | 2% |
| Friday Night | 62°F | Mostly Clear | 0 to 5 mph S | 6% |
| Saturday | 83°F | Mostly Sunny | 5 to 10 mph SW | 10% |
| Saturday Night | 67°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 25% |
| Sunday | 84°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 25% |
| Sunday Night | 66°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 45% |
| Monday | 83°F | Chance Rain Showers | 5 mph S | 44% |
| Monday Night | 66°F | Chance Showers And Thunderstorms | 5 mph W | 45% |
Forecast source: National Weather Service (api.weather.gov) for Delavan Lake (42.599, -88.624). Updated through the day.
Growing snapshot for Delavan Lake
Last spring frost
Apr 28
First fall frost
Oct 14
Growing season
168 days
Hardiness zone
5b
More local growing data for Delavan Lake: nearby ZIP 53115 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Allens Grove
Big Foot Prairie
Bloomfield
Como
Darien
Delavan
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 Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.