Portland, WI Weather Forecast
Local 7-day forecast
Mostly Cloudy
Track current conditions, temperature changes, wind, and the full daily outlook for Portland, WI in one place.
Mostly cloudy, with a low around 38. Northwest wind around 15 mph, with gusts as high as 30 mph.
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: Apr 18, 2026 7:48 AM CDT.
The active forecast window currently covers Apr 18 to Apr 24, 2026 for Portland, WI.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 18 to Apr 24, 2026
- Latest sync
- Apr 18, 2026 7:48 AM CDT
- Forecast office
- MKX
- Source
- NOAA / NWS
Daily Outlook
This Week in Portland
Thursday looks like the warmest upcoming period in Portland at 78 degrees F.
Sunday Night is the coolest period ahead with temperatures near 28 degrees F.
The strongest winds are forecast for Overnight at about 15 mph NW.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 18, 2026 7:48 AM CDT
- Coverage
- 7 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
Mostly sunny, with a high near 48. West wind around 15 mph, with gusts as high as 35 mph.
Mostly clear, with a low around 30. West wind 5 to 15 mph, with gusts as high as 30 mph.
A slight chance of rain showers after 1pm. Mostly sunny, with a high near 49. Northwest wind 5 to 15 mph. Chance of precipitation is 20%.
A slight chance of rain showers before 7pm. Mostly clear, with a low around 28. North wind 0 to 10 mph. Chance of precipitation is 20%.
Sunny, with a high near 54. South wind 0 to 10 mph.
Mostly cloudy, with a low around 42. South wind around 10 mph.
Mostly sunny, with a high near 72. Southwest wind around 10 mph.
Mostly clear, with a low around 42.
Sunny, with a high near 71.
Mostly clear, with a low around 51.
A slight chance of rain showers after 1pm. Mostly sunny, with a high near 78. Chance of precipitation is 20%.
A slight chance of rain showers before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 58. Chance of precipitation is 70%.
Rain showers likely before 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 69. Chance of precipitation is 70%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Apr 18
|
Mostly Cloudy
|
38°F |
15 mph
NW
|
|
Saturday
Apr 18
|
Mostly Sunny
|
48°F |
15 mph
W
|
|
Saturday Night
Apr 18
|
Mostly Clear
|
30°F |
5 to 15 mph
W
|
|
Sunday
Apr 19
|
Mostly Sunny then Slight Chance Rain Showers
|
49°F |
5 to 15 mph
NW
|
|
Sunday Night
Apr 19
|
Slight Chance Rain Showers then Mostly Clear
|
28°F |
0 to 10 mph
N
|
|
Monday
Apr 20
|
Sunny
|
54°F |
0 to 10 mph
S
|
|
Monday Night
Apr 20
|
Mostly Cloudy
|
42°F |
10 mph
S
|
|
Tuesday
Apr 21
|
Mostly Sunny
|
72°F |
10 mph
SW
|
|
Tuesday Night
Apr 21
|
Mostly Clear
|
42°F |
5 mph
NE
|
|
Wednesday
Apr 22
|
Sunny
|
71°F |
5 to 10 mph
E
|
|
Wednesday Night
Apr 22
|
Mostly Clear
|
51°F |
5 to 10 mph
SE
|
|
Thursday
Apr 23
|
Mostly Sunny then Slight Chance Rain Showers
|
78°F |
10 to 15 mph
S
|
|
Thursday Night
Apr 23
|
Showers And Thunderstorms Likely
|
58°F |
15 mph
S
|
|
Friday
Apr 24
|
Rain Showers Likely
|
69°F |
10 to 15 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Portland.