Delavan, WI Weather & Growing Conditions
Overnight
62°F
Showers And Thunderstorms
Showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy, with a low around 62. East wind 10 to 15 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 62°F | Showers And Thunderstorms | 10 to 15 mph E | 100% |
| Saturday | 71°F | Showers And Thunderstorms | 5 to 10 mph SE | 100% |
| Saturday Night | 60°F | Showers And Thunderstorms | 5 to 10 mph NE | 82% |
| Sunday | 65°F | Chance Rain Showers | 10 to 15 mph NE | 46% |
| Sunday Night | 52°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 16% |
| Monday | 62°F | Slight Chance Rain Showers | 10 to 15 mph NE | 18% |
| Monday Night | 48°F | Mostly Cloudy | 5 to 15 mph NE | 12% |
| Tuesday | 61°F | Partly Sunny | 10 to 15 mph NE | 12% |
| Tuesday Night | 47°F | Partly Cloudy | 5 to 10 mph NE | 6% |
| Wednesday | 63°F | Mostly Sunny | 5 to 15 mph NE | 3% |
| Wednesday Night | 48°F | Partly Cloudy | 0 to 10 mph NE | 1% |
| Thursday | 66°F | Mostly Sunny | 0 to 10 mph NE | 3% |
| Thursday Night | 49°F | Partly Cloudy | 0 to 5 mph NE | 3% |
| Friday | 69°F | Mostly Sunny | 0 to 5 mph NE | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Delavan, WI
Last spring frost
Apr 28
First fall frost
Oct 14
Growing season
168 days
Hardiness zone
5b
Explore more for Delavan, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Delavan Wwtp, Wi (1.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.