Delavan, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Delavan, a city 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 10 to 15 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Delavan
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Chance Rain Showers | 10 to 15 mph E | 35% |
| Tonight | 59°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 10 mph E | 88% |
| Saturday | 73°F | Showers And Thunderstorms | 5 to 10 mph SE | 93% |
| Saturday Night | 59°F | Showers And Thunderstorms | 5 to 10 mph NE | 75% |
| Sunday | 66°F | Chance Rain Showers | 10 to 15 mph NE | 54% |
| Sunday Night | 52°F | Chance Rain Showers | 10 to 15 mph NE | 35% |
| Monday | 62°F | Chance Rain Showers | 15 mph NE | 26% |
| Monday Night | 48°F | Chance Rain Showers | 10 to 15 mph NE | 26% |
| Tuesday | 61°F | Slight Chance Rain Showers | 10 to 15 mph NE | 16% |
| Tuesday Night | 47°F | Mostly Cloudy | 5 to 10 mph NE | 11% |
| Wednesday | 64°F | Partly Sunny | 5 to 10 mph NE | 7% |
| Wednesday Night | 48°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 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 Sep 18, 2026.