Rio, WI Weather & Growing Conditions
This Afternoon
65°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 4pm, then showers and thunderstorms likely. Cloudy, with a high near 65. East wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 65°F | Chance Showers And Thunderstorms | 5 mph E | 72% |
| Tonight | 58°F | Showers And Thunderstorms | 5 to 10 mph NE | 78% |
| Sunday | 65°F | Mostly Cloudy | 10 to 15 mph NE | 10% |
| Sunday Night | 52°F | Mostly Cloudy | 10 to 15 mph NE | 4% |
| Monday | 62°F | Mostly Cloudy | 10 to 15 mph NE | 12% |
| Monday Night | 47°F | Slight Chance Rain Showers | 10 mph NE | 21% |
| Tuesday | 61°F | Slight Chance Rain Showers then Partly Sunny | 10 to 15 mph NE | 21% |
| Tuesday Night | 44°F | Partly Cloudy | 5 to 10 mph NE | 3% |
| Wednesday | 64°F | Mostly Sunny | 5 to 10 mph NE | 2% |
| Wednesday Night | 47°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Thursday | 66°F | Mostly Sunny | 5 mph NE | 3% |
| Thursday Night | 48°F | Partly Cloudy | 0 to 5 mph NE | 3% |
| Friday | 70°F | Mostly Sunny | 0 to 5 mph NE | 3% |
| Friday Night | 49°F | Partly Cloudy | 0 to 5 mph E | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Rio, WI
Last spring frost
May 4
First fall frost
Oct 6
Growing season
154 days
Hardiness zone
5a
Explore more for Rio, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Arlington, Wi (10.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.