Rubicon, WI Weather & Growing Conditions
Today
82°F
Mostly Sunny then Slight Chance Showers And Thunderstorms
A slight chance of rain showers between 3pm and 4pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 82. Southwest wind 5 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 24% |
| Tonight | 63°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 mph W | 88% |
| Wednesday | 75°F | Patchy Fog then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 57% |
| Wednesday Night | 59°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 29% |
| Thursday | 79°F | Mostly Sunny | 0 mph | 11% |
| Thursday Night | 58°F | Mostly Clear | 0 mph | 8% |
| Friday | 81°F | Sunny | 0 to 5 mph SW | 1% |
| Friday Night | 62°F | Mostly Clear | 5 mph SW | 6% |
| Saturday | 83°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 15% |
| Saturday Night | 66°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 | 64°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 mph SW | 51% |
| Monday | 82°F | Chance Rain Showers | 5 mph S | 41% |
| Monday Night | 64°F | Chance Showers And Thunderstorms | 5 mph NE | 43% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Rubicon, WI
Last spring frost
May 8
First fall frost
Oct 3
Growing season
148 days
Hardiness zone
5a
Explore more for Rubicon, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Hartford Wwtp, Wi (2.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.