Marathon County, WI Weather Forecast
County weather hub
Mostly Sunny
Compare major city weather across Marathon County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Mostly sunny. High near 62, with temperatures falling to around 59 in the afternoon. Northwest wind 8 to 12 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
- Oct 13 to Oct 19, 2026
- Latest sync
- Oct 13, 2026 4:47 PM 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 66 degrees F.
Friday Night is the coolest period ahead with temperatures near 29 degrees F.
The strongest winds are forecast for Friday at about 15 to 24 mph NW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 13, 2026 4:47 PM 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
Mostly cloudy, with a low around 47. Northwest wind 3 to 7 mph.
Partly sunny, with a high near 62. North wind 5 to 8 mph.
Mostly cloudy, with a low around 39. East northeast wind around 6 mph.
Rain showers likely after 7am. Mostly cloudy, with a high near 57. East wind around 6 mph. Chance of precipitation is 70%.
Rain showers likely before 1am. Mostly cloudy, with a low around 37. Chance of precipitation is 70%.
Mostly sunny, with a high near 52.
Widespread frost after 10pm. Mostly clear, with a low around 29.
Widespread frost before 9am. Sunny, with a high near 59.
Clear, with a low around 35.
Sunny, with a high near 64.
Partly cloudy, with a low around 41.
Mostly sunny, with a high near 66.
Partly cloudy, with a low around 39.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Oct 13
|
Mostly Sunny
|
62°F |
8 to 12 mph
NW
|
|
Tonight
Oct 13
|
Mostly Cloudy
|
47°F |
3 to 7 mph
NW
|
|
Wednesday
Oct 14
|
Partly Sunny
|
62°F |
5 to 8 mph
N
|
|
Wednesday Night
Oct 14
|
Mostly Cloudy
|
39°F |
6 mph
ENE
|
|
Thursday
Oct 15
|
Rain Showers Likely
|
57°F |
6 mph
E
|
|
Thursday Night
Oct 15
|
Rain Showers Likely
|
37°F |
5 to 17 mph
NW
|
|
Friday
Oct 16
|
Mostly Sunny
|
52°F |
15 to 24 mph
NW
|
|
Friday Night
Oct 16
|
Widespread Frost
|
29°F |
3 to 13 mph
WNW
|
|
Saturday
Oct 17
|
Widespread Frost then Sunny
|
59°F |
3 to 15 mph
SW
|
|
Saturday Night
Oct 17
|
Clear
|
35°F |
13 mph
SSW
|
|
Sunday
Oct 18
|
Sunny
|
64°F |
12 to 17 mph
SSW
|
|
Sunday Night
Oct 18
|
Partly Cloudy
|
41°F |
5 to 13 mph
SW
|
|
Monday
Oct 19
|
Mostly Sunny
|
66°F |
5 mph
W
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
39°F |
3 mph
SSE
|
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.
