Helenville, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Helenville, a community in Jefferson County, Wisconsin.
Today
70°F
Chance Showers And Thunderstorms then Showers And Thunderstorms
A chance of showers and thunderstorms before noon, then showers and thunderstorms. Cloudy, with a high near 70. Southeast wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast for Helenville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 70°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 to 10 mph SE | 78% |
| Tonight | 59°F | Showers And Thunderstorms | 5 to 10 mph E | 83% |
| Sunday | 66°F | Chance Rain Showers then Cloudy | 10 to 15 mph NE | 52% |
| Sunday Night | 52°F | Mostly Cloudy | 10 to 15 mph NE | 3% |
| Monday | 63°F | Mostly Cloudy | 10 to 15 mph NE | 9% |
| Monday Night | 47°F | Mostly Cloudy | 5 to 10 mph NE | 7% |
| Tuesday | 62°F | Partly Sunny | 5 to 15 mph NE | 8% |
| Tuesday Night | 47°F | Partly Cloudy | 5 to 10 mph NE | 4% |
| Wednesday | 64°F | Mostly Sunny | 5 to 10 mph NE | 3% |
| Wednesday Night | 48°F | Partly Cloudy | 0 to 5 mph NE | 0% |
| Thursday | 67°F | Mostly Sunny | 5 mph NE | 3% |
| Thursday Night | 49°F | Partly Cloudy | 0 to 5 mph NE | 3% |
| Friday | 71°F | Mostly Sunny | 0 to 5 mph NE | 3% |
| Friday Night | 49°F | Partly Cloudy | 0 to 5 mph NE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Helenville (43.017, -88.700). Updated through the day.
Growing snapshot for Helenville
Last spring frost
May 3
First fall frost
Oct 9
Growing season
157 days
Hardiness zone
5b
More local growing data for Helenville: nearby ZIP 53137 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Fort Atkinson
Hebron
Ixonia
Jefferson
Johnson Creek
Lake Mills
Palmyra
Rome
Sullivan
Waterloo
Watertown
Climate data from the nearest NOAA station, Sullivan 3Se, Wi (6.6 mi from Helenville). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.