Brillion, WI Weather & Growing Conditions
Tonight
59°F
Rain Showers
A chance of rain showers before 8pm, then rain showers and areas of fog. Cloudy, with a low around 59. South southeast wind around 13 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 59°F | Rain Showers | 13 mph SSE | 86% |
| Wednesday | 65°F | Rain Showers | 10 to 15 mph S | 85% |
| Wednesday Night | 48°F | Rain Showers Likely | 15 mph SW | 61% |
| Thursday | 53°F | Rain Showers | 9 to 13 mph W | 85% |
| Thursday Night | 38°F | Chance Rain Showers | 15 mph N | 48% |
| Friday | 46°F | Slight Chance Rain Showers then Partly Sunny | 10 to 16 mph N | 22% |
| Friday Night | 32°F | Partly Cloudy | 2 to 7 mph NNW | 4% |
| Saturday | 49°F | Mostly Sunny | 2 to 6 mph W | 3% |
| Saturday Night | 34°F | Partly Cloudy | 3 to 7 mph WSW | 9% |
| Sunday | 55°F | Mostly Sunny | 7 to 12 mph W | 14% |
| Sunday Night | 35°F | Mostly Clear | 8 mph W | 5% |
| Monday | 57°F | Mostly Sunny | 6 to 13 mph WSW | 1% |
| Monday Night | 40°F | Partly Cloudy | 12 mph W | 1% |
| Tuesday | 56°F | Sunny | 8 to 12 mph WNW | 0% |
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 Nov 4, 2026.