Brillion, WI Weather & Growing Conditions
Today
63°F
Rain Showers Likely
Rain showers likely before 4pm, then showers and thunderstorms likely. Cloudy, with a high near 63. East southeast wind around 13 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 63°F | Rain Showers Likely | 13 mph ESE | 70% |
| Tonight | 54°F | Showers And Thunderstorms Likely | 10 mph NE | 65% |
| Sunday | 66°F | Mostly Sunny | 10 to 15 mph NNE | 13% |
| Sunday Night | 50°F | Mostly Cloudy | 9 to 15 mph NE | 1% |
| Monday | 60°F | Mostly Cloudy | 9 to 14 mph NE | 2% |
| Monday Night | 46°F | Mostly Cloudy | 7 to 12 mph NE | 2% |
| Tuesday | 61°F | Mostly Sunny | 6 to 14 mph ENE | 2% |
| Tuesday Night | 46°F | Mostly Clear | 5 to 9 mph NE | 3% |
| Wednesday | 63°F | Mostly Sunny | 5 to 10 mph ENE | 3% |
| Wednesday Night | 48°F | Partly Cloudy | 3 to 7 mph NE | 1% |
| Thursday | 66°F | Mostly Sunny | 3 to 8 mph NE | 2% |
| Thursday Night | 48°F | Partly Cloudy | 5 mph NE | 1% |
| Friday | 70°F | Mostly Sunny | 2 to 7 mph NE | 2% |
| Friday Night | 49°F | Partly Cloudy | 1 to 5 mph E | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Brillion, WI
Last spring frost
May 6
First fall frost
Oct 6
Growing season
151 days
Hardiness zone
5b
Explore more for Brillion, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Brillion, Wi (1.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.