Helenville, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Helenville, a community in Jefferson County, Wisconsin.
Today
83°F
Mostly Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 83. South wind 0 to 10 mph. Chance of precipitation is 20%.
7-day forecast for Helenville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 10 mph S | 17% |
| Tonight | 64°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 to 10 mph W | 91% |
| Wednesday | 75°F | Patchy Fog then Chance Showers And Thunderstorms | 5 mph W | 66% |
| Wednesday Night | 58°F | Chance Showers And Thunderstorms | 0 to 5 mph NW | 38% |
| Thursday | 78°F | Slight Chance Rain Showers then Mostly Sunny | 0 mph | 20% |
| Thursday Night | 58°F | Mostly Clear | 0 mph | 7% |
| Friday | 81°F | Sunny | 0 to 5 mph SW | 2% |
| Friday Night | 62°F | Mostly Clear | 0 to 5 mph SW | 5% |
| Saturday | 83°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 15% |
| Saturday Night | 67°F | Slight Chance Showers And Thunderstorms | 5 mph SW | 30% |
| Sunday | 84°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 30% |
| Sunday Night | 66°F | Chance Showers And Thunderstorms | 5 mph SW | 49% |
| Monday | 82°F | Chance Rain Showers | 5 mph S | 45% |
| Monday Night | 65°F | Chance Showers And Thunderstorms | 5 mph W | 44% |
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 Aug 4, 2026.