Marathon County, WI Weather Forecast
County weather hub
Mostly Cloudy
Compare major city weather across Marathon County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Mostly cloudy, with a low around 57. South wind around 3 mph.
County Weather Overview
This county weather page brings together forecast coverage for Marathon County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 7 of 7 mapped cities in Marathon County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Aug 29 to Sep 4, 2026
- Latest sync
- Aug 29, 2026 4:40 AM CDT
- Forecast office
- GRB
- Source
- NOAA / NWS
Daily Outlook
This Week in Marathon County
Monday looks like the warmest upcoming period in Marathon County at 86 degrees F.
Overnight is the coolest period ahead with temperatures near 57 degrees F.
The strongest winds are forecast for Saturday at about 3 to 9 mph S.
Precipitation is mentioned in 13 upcoming forecast periods.
Forecast Details
- Last updated
- Aug 29, 2026 4:40 AM CDT
- Coverage
- 7 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
A chance of rain showers between 7am and 10am, then showers and thunderstorms. Cloudy, with a high near 71. South wind 3 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then patchy fog and a slight chance of showers and thunderstorms between 1am and 4am. Mostly cloudy, with a low around 61. South southeast wind 6 to 9 mph. Chance of precipitation is 40%. New rainfall amounts between a quarter and half of an inch possible.
Patchy fog before 7am, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 82. Heat index values as high as 85. Southeast wind around 7 mph. Chance of precipitation is 30%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. East southeast wind 5 to 8 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 85. Chance of precipitation is 40%.
A slight chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Partly sunny, with a high near 82. Chance of precipitation is 40%.
A slight chance of rain showers before 7pm, then a slight chance of showers and thunderstorms. Partly cloudy, with a low around 59. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 82. Chance of precipitation is 20%.
A chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 60. Chance of precipitation is 30%.
A chance of rain showers before 1pm. Mostly sunny, with a high near 82. Chance of precipitation is 30%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Aug 29
|
Mostly Cloudy
|
57°F |
3 mph
S
|
|
Saturday
Aug 29
|
Showers And Thunderstorms
|
71°F |
3 to 9 mph
S
|
|
Saturday Night
Aug 29
|
Chance Showers And Thunderstorms
|
61°F |
6 to 9 mph
SSE
|
|
Sunday
Aug 30
|
Patchy Fog then Chance Showers And Thunderstorms
|
82°F |
7 mph
SE
|
|
Sunday Night
Aug 30
|
Chance Showers And Thunderstorms
|
64°F |
5 to 8 mph
ESE
|
|
Monday
Aug 31
|
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
|
86°F |
9 mph
S
|
|
Monday Night
Aug 31
|
Chance Showers And Thunderstorms
|
66°F |
3 to 7 mph
SW
|
|
Tuesday
Sep 1
|
Chance Showers And Thunderstorms
|
85°F |
2 to 8 mph
SW
|
|
Tuesday Night
Sep 1
|
Slight Chance Showers And Thunderstorms
|
63°F |
3 to 7 mph
NW
|
|
Wednesday
Sep 2
|
Chance Showers And Thunderstorms
|
82°F |
2 to 6 mph
NW
|
|
Wednesday Night
Sep 2
|
Slight Chance Showers And Thunderstorms
|
59°F |
5 mph
NNE
|
|
Thursday
Sep 3
|
Slight Chance Showers And Thunderstorms
|
82°F |
6 mph
SE
|
|
Thursday Night
Sep 3
|
Chance Showers And Thunderstorms
|
60°F |
6 mph
SE
|
|
Friday
Sep 4
|
Chance Rain Showers
|
82°F |
5 to 8 mph
S
|
Major City Forecasts
Live forecast snapshots for major cities across Marathon County.
Coverage
Forecast coverage currently spans 7 of 7 mapped cities in Marathon County.
Largest mapped city population in this region: 8,143.
