Brillion, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Brillion, a city in Calumet County, Wisconsin.
This Afternoon
62°F
Showers And Thunderstorms
Rain showers likely before 4pm, then showers and thunderstorms. Cloudy, with a high near 62. East wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Brillion
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 62°F | Showers And Thunderstorms | 10 mph E | 79% |
| Tonight | 55°F | Chance Showers And Thunderstorms | 8 to 12 mph NE | 52% |
| Sunday | 66°F | Partly Sunny | 12 to 16 mph NE | 5% |
| Sunday Night | 50°F | Mostly Cloudy | 8 to 15 mph NE | 5% |
| Monday | 60°F | Mostly Cloudy | 8 to 14 mph ENE | 1% |
| Monday Night | 44°F | Mostly Cloudy | 7 to 12 mph NE | 2% |
| Tuesday | 60°F | Partly Sunny | 6 to 14 mph ENE | 4% |
| Tuesday Night | 47°F | Partly Cloudy | 6 to 10 mph NE | 4% |
| Wednesday | 63°F | Mostly Sunny | 6 to 12 mph ENE | 5% |
| Wednesday Night | 50°F | Partly Cloudy | 3 to 7 mph NE | 3% |
| Thursday | 66°F | Mostly Sunny | 3 to 8 mph ENE | 4% |
| Thursday Night | 51°F | Mostly Cloudy | 1 to 5 mph NE | 4% |
| Friday | 70°F | Partly Sunny | 2 to 6 mph NE | 4% |
| Friday Night | 51°F | Partly Cloudy | 0 to 3 mph NE | 2% |
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 Sep 19, 2026.