Delavan Lake, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Delavan Lake, a community in Walworth County, Wisconsin.
This Afternoon
69°F
Light Rain
Rain and a slight chance of thunderstorms. Cloudy, with a high near 69. South wind around 15 mph, with gusts as high as 35 mph. Chance of precipitation is 100%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Delavan Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Light Rain | 15 mph S | 95% |
| Tonight | 56°F | Light Rain | 10 to 15 mph S | 86% |
| Wednesday | 61°F | Light Rain | 10 to 15 mph SW | 76% |
| Wednesday Night | 46°F | Chance Light Rain | 10 mph SW | 32% |
| Thursday | 54°F | Light Rain Likely | 5 to 10 mph W | 64% |
| Thursday Night | 40°F | Chance Light Rain | 5 to 10 mph NW | 49% |
| Friday | 49°F | Slight Chance Light Rain then Mostly Cloudy | 10 mph N | 20% |
| Friday Night | 32°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 | 57°F | Mostly Sunny then Slight Chance Light Rain | 5 to 10 mph W | 17% |
| Sunday Night | 34°F | Mostly Clear | 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 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 Nov 3, 2026.