Rubicon, WI Weather & Growing Conditions
Tonight
58°F
Light Rain
Rain. Cloudy, with a low around 58. South wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 58°F | Light Rain | 10 mph S | 84% |
| Wednesday | 60°F | Chance Light Rain then Cloudy | 10 to 15 mph S | 28% |
| Wednesday Night | 46°F | Cloudy then Chance Light Rain | 15 mph SW | 36% |
| Thursday | 52°F | Light Rain Likely | 5 to 15 mph W | 60% |
| Thursday Night | 38°F | Chance Light Rain | 5 to 10 mph N | 50% |
| Friday | 48°F | Slight Chance Light Rain then Partly Sunny | 5 to 15 mph N | 22% |
| Friday Night | 31°F | Partly Cloudy | 0 to 5 mph N | 3% |
| Saturday | 50°F | Mostly Sunny | 0 to 5 mph W | 2% |
| Saturday Night | 32°F | Partly Cloudy | 0 to 5 mph W | 8% |
| Sunday | 56°F | Slight Chance Light Rain | 5 to 10 mph W | 18% |
| Sunday Night | 34°F | Mostly Clear | 5 mph W | 4% |
| Monday | 58°F | Mostly Sunny | 5 to 15 mph SW | 2% |
| Monday Night | 38°F | Partly Cloudy | 5 to 10 mph W | 1% |
| Tuesday | 58°F | Sunny | 5 to 10 mph NW | 0% |
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 Nov 4, 2026.