Brillion, WI Weather Forecast
Local 7-day forecast
Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Brillion, WI in one place.
A chance of drizzle and a slight chance of rain showers before 11am, then rain showers and a chance of drizzle. Cloudy. High near 58, with temperatures falling to around 56 in the afternoon. East southeast wind around 10 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Local Weather Overview
This forecast page for Brillion, WI is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Oct 15, 2026 12:39 PM CDT.
The active forecast window currently covers Oct 15 to Oct 21, 2026 for Brillion, WI.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 21, 2026
- Latest sync
- Oct 15, 2026 12:39 PM CDT
- Forecast office
- GRB
- Source
- NOAA / NWS
Daily Outlook
This Week in Brillion
Wednesday looks like the warmest upcoming period in Brillion at 68 degrees F.
Friday Night is the coolest period ahead with temperatures near 31 degrees F.
The strongest winds are forecast for Friday at about 15 to 23 mph NNW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 15, 2026 12:39 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- GRB
- Radar station
- KGRB
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Rain showers. Cloudy. Low around 45, with temperatures rising to around 47 overnight. North northeast wind 5 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
A chance of rain showers before 1pm. Partly sunny. High near 53, with temperatures falling to around 50 in the afternoon. North northwest wind 15 to 23 mph, with gusts as high as 40 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Widespread frost after midnight. Mostly clear, with a low around 31. Northwest wind 3 to 18 mph, with gusts as high as 32 mph.
Widespread frost before 9am. Sunny, with a high near 55. West southwest wind 3 to 15 mph, with gusts as high as 23 mph.
Clear, with a low around 39.
Sunny, with a high near 62.
Mostly clear, with a low around 42.
Sunny, with a high near 65.
Mostly clear, with a low around 41.
Patchy fog before 8am. Sunny, with a high near 66.
Mostly clear, with a low around 44.
Mostly sunny, with a high near 68.
A slight chance of rain showers after 1am. Partly cloudy, with a low around 48. Chance of precipitation is 20%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Oct 15
|
Rain Showers
|
58°F |
10 mph
ESE
|
|
Tonight
Oct 15
|
Rain Showers
|
45°F |
5 to 15 mph
NNE
|
|
Friday
Oct 16
|
Chance Rain Showers
|
53°F |
15 to 23 mph
NNW
|
|
Friday Night
Oct 16
|
Mostly Clear then Widespread Frost
|
31°F |
3 to 18 mph
NW
|
|
Saturday
Oct 17
|
Widespread Frost then Sunny
|
55°F |
3 to 15 mph
WSW
|
|
Saturday Night
Oct 17
|
Clear
|
39°F |
12 to 16 mph
SW
|
|
Sunday
Oct 18
|
Sunny
|
62°F |
16 to 20 mph
SW
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
42°F |
6 to 15 mph
SW
|
|
Monday
Oct 19
|
Sunny
|
65°F |
7 mph
SW
|
|
Monday Night
Oct 19
|
Mostly Clear
|
41°F |
3 mph
SW
|
|
Tuesday
Oct 20
|
Patchy Fog then Sunny
|
66°F |
0 to 5 mph
SE
|
|
Tuesday Night
Oct 20
|
Mostly Clear
|
44°F |
5 mph
SSE
|
|
Wednesday
Oct 21
|
Mostly Sunny
|
68°F |
3 to 10 mph
S
|
|
Wednesday Night
Oct 21
|
Partly Cloudy then Slight Chance Rain Showers
|
48°F |
9 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Brillion.
