Brillion, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Brillion, a city in Calumet County, Wisconsin.
Today
83°F
Partly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 3pm. Partly sunny. High near 83, with temperatures falling to around 81 in the afternoon. Heat index values as high as 87. Southwest wind 12 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Brillion
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Partly Sunny then Chance Showers And Thunderstorms | 12 to 15 mph SW | 43% |
| Tonight | 63°F | Chance Showers And Thunderstorms | 3 to 10 mph W | 68% |
| Wednesday | 78°F | Chance Showers And Thunderstorms then Mostly Cloudy | 5 mph WNW | 50% |
| Wednesday Night | 56°F | Partly Cloudy | 0 to 5 mph SW | 3% |
| Thursday | 80°F | Mostly Sunny | 0 to 5 mph SSW | 0% |
| Thursday Night | 59°F | Mostly Clear | 6 mph S | 0% |
| Friday | 82°F | Sunny | 3 to 13 mph SW | 1% |
| Friday Night | 65°F | Mostly Clear | 8 to 12 mph SW | 8% |
| Saturday | 84°F | Sunny | 8 to 13 mph SW | 12% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms | 6 to 10 mph SSW | 40% |
| Sunday | 84°F | Chance Showers And Thunderstorms | 7 to 12 mph WSW | 40% |
| Sunday Night | 64°F | Chance Showers And Thunderstorms | 3 to 10 mph W | 48% |
| Monday | 81°F | Chance Rain Showers | 3 to 8 mph S | 33% |
| Monday Night | 63°F | Chance Showers And Thunderstorms | 3 to 8 mph NNE | 39% |
Forecast source: National Weather Service (api.weather.gov) for Brillion (44.174, -88.068). Updated through the day.
Growing snapshot for Brillion
Last spring frost
May 6
First fall frost
Oct 6
Growing season
151 days
Hardiness zone
5b
More local growing data for Brillion: nearby ZIP 54110 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Brillion, Wi (1.6 mi from Brillion). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.