Portland, WI Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms then Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Portland, WI in one place.
A chance of rain showers before 7am, then a chance of showers and thunderstorms between 7am and 11am. Mostly sunny, with a high near 82. South wind 7 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Local Weather Overview
This forecast page for Portland, 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 24, 2026 1:38 PM CDT.
The active forecast window currently covers May 25 to May 30, 2026 for Portland, WI.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 25 to May 30, 2026
- Latest sync
- May 24, 2026 1:38 PM CDT
- Forecast office
- ARX
- Source
- NOAA / NWS
Daily Outlook
This Week in Portland
Wednesday looks like the warmest upcoming period in Portland at 88 degrees F.
Friday Night is the coolest period ahead with temperatures near 54 degrees F.
The strongest winds are forecast for Memorial Day at about 7 to 13 mph S.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- May 24, 2026 1:38 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- ARX
- Radar station
- KARX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 60. South wind 5 to 9 mph, with gusts as high as 20 mph.
Sunny, with a high near 86. Southwest wind around 6 mph.
Mostly clear, with a low around 61. South wind 0 to 3 mph.
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. East wind 1 to 6 mph. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 59. East wind around 6 mph. Chance of precipitation is 20%.
Sunny, with a high near 83. East wind around 7 mph.
Partly cloudy, with a low around 56. East wind around 6 mph.
Mostly sunny, with a high near 80. East wind around 7 mph.
Partly cloudy, with a low around 54. East wind around 5 mph.
Sunny, with a high near 78. East wind around 6 mph.
Mostly clear, with a low around 54. East wind around 5 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Memorial Day
May 25
|
Chance Showers And Thunderstorms then Mostly Sunny
|
82°F |
7 to 13 mph
S
|
|
Monday Night
May 25
|
Mostly Clear
|
60°F |
5 to 9 mph
S
|
|
Tuesday
May 26
|
Sunny
|
86°F |
6 mph
SW
|
|
Tuesday Night
May 26
|
Mostly Clear
|
61°F |
0 to 3 mph
S
|
|
Wednesday
May 27
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
88°F |
1 to 6 mph
E
|
|
Wednesday Night
May 27
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
59°F |
6 mph
E
|
|
Thursday
May 28
|
Sunny
|
83°F |
7 mph
E
|
|
Thursday Night
May 28
|
Partly Cloudy
|
56°F |
6 mph
E
|
|
Friday
May 29
|
Mostly Sunny
|
80°F |
7 mph
E
|
|
Friday Night
May 29
|
Partly Cloudy
|
54°F |
5 mph
E
|
|
Saturday
May 30
|
Sunny
|
78°F |
6 mph
E
|
|
Saturday Night
May 30
|
Mostly Clear
|
54°F |
5 mph
E
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Portland.