Sullivan, WI Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Sullivan, WI in one place.
Mostly sunny, with a high near 74. East wind 5 to 15 mph.
Local Weather Overview
This forecast page for Sullivan, 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: May 28, 2026 2:11 AM CDT.
The active forecast window currently covers May 30 to Jun 3, 2026 for Sullivan, WI.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 30 to Jun 3, 2026
- Latest sync
- May 28, 2026 2:11 AM CDT
- Forecast office
- MKX
- Source
- NOAA / NWS
Daily Outlook
This Week in Sullivan
Wednesday looks like the warmest upcoming period in Sullivan at 82 degrees F.
Saturday Night is the coolest period ahead with temperatures near 50 degrees F.
The strongest winds are forecast for Saturday at about 5 to 15 mph E.
The forecast from May 30 through Jun 3 stays mostly dry.
Forecast Details
- Last updated
- May 28, 2026 2:11 AM CDT
- Coverage
- 5 days
- Time zone
- America/Chicago
- Forecast office
- MKX
- Radar station
- KMKX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Partly cloudy, with a low around 50. East wind 5 to 10 mph.
Mostly sunny, with a high near 79. Southeast wind around 5 mph.
Partly cloudy, with a low around 52.
Mostly sunny, with a high near 80.
Mostly clear, with a low around 52.
Sunny, with a high near 79.
Mostly clear, with a low around 51.
Sunny, with a high near 82.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
May 30
|
Mostly Sunny
|
74°F |
5 to 15 mph
E
|
|
Saturday Night
May 30
|
Partly Cloudy
|
50°F |
5 to 10 mph
E
|
|
Sunday
May 31
|
Mostly Sunny
|
79°F |
5 mph
SE
|
|
Sunday Night
May 31
|
Partly Cloudy
|
52°F |
0 to 5 mph
E
|
|
Monday
Jun 1
|
Mostly Sunny
|
80°F |
0 to 10 mph
NE
|
|
Monday Night
Jun 1
|
Mostly Clear
|
52°F |
0 to 10 mph
NE
|
|
Tuesday
Jun 2
|
Sunny
|
79°F |
5 to 10 mph
NE
|
|
Tuesday Night
Jun 2
|
Mostly Clear
|
51°F |
0 to 5 mph
SE
|
|
Wednesday
Jun 3
|
Sunny
|
82°F |
0 to 10 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sullivan.
