Jefferson County, WI Weather Forecast
County weather hub
Mostly Sunny
Compare major city weather across Jefferson County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Mostly sunny, with a high near 73. East wind 10 to 15 mph.
County Weather Overview
This county weather page brings together forecast coverage for Jefferson County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 6 of 6 mapped cities in Jefferson County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- May 30 to Jun 5, 2026
- Latest sync
- May 30, 2026 1:27 AM CDT
- Forecast office
- MKX
- Source
- NOAA / NWS
Daily Outlook
This Week in Jefferson County
Thursday looks like the warmest upcoming period in Jefferson County at 87 degrees F.
Saturday Night is the coolest period ahead with temperatures near 49 degrees F.
The strongest winds are forecast for Saturday at about 10 to 15 mph E.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- May 30, 2026 1:27 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
Partly cloudy, with a low around 49. East wind 5 to 10 mph.
Partly sunny, with a high near 77. Southeast wind 5 to 10 mph.
Mostly cloudy, with a low around 51. South wind 0 to 5 mph.
Mostly sunny, with a high near 80. East wind 0 to 5 mph.
Mostly clear, with a low around 51. East wind 0 to 5 mph.
Sunny, with a high near 80. East wind 5 to 10 mph.
Mostly clear, with a low around 51.
Sunny, with a high near 84.
Partly cloudy, with a low around 57.
Mostly sunny, with a high near 87.
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 30%.
A chance of showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 40%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
May 30
|
Mostly Sunny
|
73°F |
10 to 15 mph
E
|
|
Saturday Night
May 30
|
Partly Cloudy
|
49°F |
5 to 10 mph
E
|
|
Sunday
May 31
|
Partly Sunny
|
77°F |
5 to 10 mph
SE
|
|
Sunday Night
May 31
|
Mostly Cloudy
|
51°F |
0 to 5 mph
S
|
|
Monday
Jun 1
|
Mostly Sunny
|
80°F |
0 to 5 mph
E
|
|
Monday Night
Jun 1
|
Mostly Clear
|
51°F |
0 to 5 mph
E
|
|
Tuesday
Jun 2
|
Sunny
|
80°F |
5 to 10 mph
E
|
|
Tuesday Night
Jun 2
|
Mostly Clear
|
51°F |
0 to 5 mph
E
|
|
Wednesday
Jun 3
|
Sunny
|
84°F |
0 to 5 mph
S
|
|
Wednesday Night
Jun 3
|
Partly Cloudy
|
57°F |
5 mph
S
|
|
Thursday
Jun 4
|
Mostly Sunny
|
87°F |
5 to 10 mph
SW
|
|
Thursday Night
Jun 4
|
Slight Chance Showers And Thunderstorms
|
63°F |
5 mph
S
|
|
Friday
Jun 5
|
Chance Showers And Thunderstorms
|
86°F |
5 to 10 mph
S
|
Major City Forecasts
Live forecast snapshots for major cities across Jefferson County.
Coverage
Forecast coverage currently spans 6 of 6 mapped cities in Jefferson County.
Largest mapped city population in this region: 12,372.
