Marathon, WI Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Marathon, WI in one place.
Mostly sunny. High near 65, with temperatures falling to around 62 in the afternoon. East wind 6 to 9 mph.
Local Weather Overview
This forecast page for Marathon, 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: Sep 22, 2026 8:26 AM CDT.
The active forecast window currently covers Sep 23 to Sep 28, 2026 for Marathon, WI.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 23 to Sep 28, 2026
- Latest sync
- Sep 22, 2026 8:26 AM CDT
- Forecast office
- GRB
- Source
- NOAA / NWS
Daily Outlook
This Week in Marathon
Monday looks like the warmest upcoming period in Marathon at 70 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 42 degrees F.
The strongest winds are forecast for Wednesday at about 6 to 9 mph E.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 22, 2026 8:26 AM CDT
- Coverage
- 6 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
Partly cloudy, with a low around 42. East wind 3 to 7 mph.
Partly sunny, with a high near 65. East southeast wind 3 to 7 mph.
Mostly cloudy, with a low around 44.
Partly sunny, with a high near 67.
Mostly cloudy, with a low around 44.
A slight chance of rain showers after 1pm. Partly sunny, with a high near 66. Chance of precipitation is 20%.
A chance of rain showers. Mostly cloudy, with a low around 47. Chance of precipitation is 50%.
A chance of rain showers before 7am. Mostly cloudy, with a high near 68. Chance of precipitation is 50%.
Mostly cloudy, with a low around 49.
Partly sunny, with a high near 70.
A chance of rain showers after 1am. Mostly cloudy, with a low around 53. Chance of precipitation is 30%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Sep 23
|
Mostly Sunny
|
65°F |
6 to 9 mph
E
|
|
Wednesday Night
Sep 23
|
Partly Cloudy
|
42°F |
3 to 7 mph
E
|
|
Thursday
Sep 24
|
Partly Sunny
|
65°F |
3 to 7 mph
ESE
|
|
Thursday Night
Sep 24
|
Mostly Cloudy
|
44°F |
1 to 5 mph
SE
|
|
Friday
Sep 25
|
Partly Sunny
|
67°F |
1 to 5 mph
ESE
|
|
Friday Night
Sep 25
|
Mostly Cloudy
|
44°F |
3 mph
SE
|
|
Saturday
Sep 26
|
Partly Sunny then Slight Chance Rain Showers
|
66°F |
2 to 9 mph
SE
|
|
Saturday Night
Sep 26
|
Chance Rain Showers
|
47°F |
5 to 8 mph
SSE
|
|
Sunday
Sep 27
|
Chance Rain Showers then Mostly Cloudy
|
68°F |
6 mph
S
|
|
Sunday Night
Sep 27
|
Mostly Cloudy
|
49°F |
5 mph
S
|
|
Monday
Sep 28
|
Partly Sunny
|
70°F |
2 to 8 mph
SSE
|
|
Monday Night
Sep 28
|
Mostly Cloudy then Chance Rain Showers
|
53°F |
5 to 8 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Marathon.
