Arena, WI Weather & Growing Conditions
Today
81°F
Partly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 81. Southwest wind 5 to 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 81°F | Partly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph SW | 34% |
| Tonight | 61°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 to 5 mph NW | 75% |
| Wednesday | 77°F | Areas Of Fog then Partly Sunny | 0 to 5 mph NW | 36% |
| Wednesday Night | 54°F | Partly Cloudy | 0 to 5 mph W | 13% |
| Thursday | 79°F | Sunny | 0 mph | 1% |
| Thursday Night | 57°F | Mostly Clear | 0 mph | 1% |
| Friday | 82°F | Sunny | 0 to 5 mph SW | 2% |
| Friday Night | 62°F | Mostly Clear | 0 to 5 mph S | 7% |
| Saturday | 84°F | Mostly Sunny | 5 to 10 mph SW | 10% |
| Saturday Night | 67°F | Partly Cloudy then Chance Showers And Thunderstorms | 5 mph SW | 25% |
| Sunday | 85°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 25% |
| Sunday Night | 65°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 49% |
| Monday | 84°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 mph S | 49% |
| Monday Night | 66°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 mph N | 41% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Arena, WI
Last spring frost
May 7
First fall frost
Oct 1
Growing season
148 days
Hardiness zone
5a
Explore more for Arena, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Mazomanie Wwtp, Wi (7.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.