Portland, WI Weather Forecast
Local 7-day forecast
Isolated Rain Showers then Isolated Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Portland, WI in one place.
Isolated rain showers between 7am and 1pm, then isolated showers and thunderstorms. Sunny, with a high near 87. Northwest wind around 10 mph. Chance of precipitation is 20%.
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: Jul 16, 2026 3:34 PM CDT.
The active forecast window currently covers Jul 18 to Jul 22, 2026 for Portland, WI.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 18 to Jul 22, 2026
- Latest sync
- Jul 16, 2026 3:34 PM CDT
- Forecast office
- MKX
- Source
- NOAA / NWS
Daily Outlook
This Week in Portland
Saturday looks like the warmest upcoming period in Portland at 87 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 57 degrees F.
The strongest winds are forecast for Monday at about 5 to 15 mph SW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 16, 2026 3:34 PM 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
Isolated rain showers before 7pm. Mostly clear, with a low around 61. Northeast wind 0 to 10 mph. Chance of precipitation is 20%.
Sunny, with a high near 85. East wind 0 to 5 mph.
Partly cloudy, with a low around 64. South wind around 5 mph.
A chance of showers and thunderstorms between 7am and 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Partly cloudy, with a low around 67. Chance of precipitation is 40%.
A slight chance of rain showers. Sunny, with a high near 82. Chance of precipitation is 20%.
A slight chance of rain showers before 7pm. Mostly clear, with a low around 58. Chance of precipitation is 20%.
Sunny, with a high near 78.
Mostly clear, with a low around 57.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Jul 18
|
Isolated Rain Showers then Isolated Showers And Thunderstorms
|
87°F |
10 mph
NW
|
|
Saturday Night
Jul 18
|
Isolated Rain Showers then Mostly Clear
|
61°F |
0 to 10 mph
NE
|
|
Sunday
Jul 19
|
Sunny
|
85°F |
0 to 5 mph
E
|
|
Sunday Night
Jul 19
|
Partly Cloudy
|
64°F |
5 mph
S
|
|
Monday
Jul 20
|
Chance Showers And Thunderstorms
|
87°F |
5 to 15 mph
SW
|
|
Monday Night
Jul 20
|
Chance Showers And Thunderstorms
|
67°F |
10 mph
W
|
|
Tuesday
Jul 21
|
Slight Chance Rain Showers
|
82°F |
10 to 15 mph
NW
|
|
Tuesday Night
Jul 21
|
Slight Chance Rain Showers then Mostly Clear
|
58°F |
5 to 15 mph
NW
|
|
Wednesday
Jul 22
|
Sunny
|
78°F |
5 to 10 mph
NW
|
|
Wednesday Night
Jul 22
|
Mostly Clear
|
57°F |
0 to 5 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Portland.