Jefferson County, WI Weather Forecast
County weather hub
Mostly Clear
Compare major city weather across Jefferson County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Mostly clear, with a low around 68. West wind around 5 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
- Jul 14 to Jul 20, 2026
- Latest sync
- Jul 14, 2026 3:14 AM CDT
- Forecast office
- MKX
- Source
- NOAA / NWS
Daily Outlook
This Week in Jefferson County
Tuesday looks like the warmest upcoming period in Jefferson County at 96 degrees F.
Sunday Night is the coolest period ahead with temperatures near 61 degrees F.
The strongest winds are forecast for Friday at about 0 to 10 mph S.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 14, 2026 3:14 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
Sunny, with a high near 96. Heat index values as high as 100. West wind around 5 mph.
Mostly clear, with a low around 70. Heat index values as high as 99. West wind 0 to 5 mph.
Sunny, with a high near 96. Heat index values as high as 102. Northwest wind 0 to 5 mph.
Partly cloudy, with a low around 69. East wind 0 to 5 mph.
Sunny, with a high near 93. Northeast wind 0 to 5 mph.
Mostly clear, with a low around 68. East wind 0 to 5 mph.
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. South wind 0 to 10 mph. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 70. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 64. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms. Sunny, with a high near 85. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms. Mostly clear, with a low around 61. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 81. Chance of precipitation is 20%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Jul 14
|
Mostly Clear
|
68°F |
5 mph
W
|
|
Tuesday
Jul 14
|
Sunny
|
96°F |
5 mph
W
|
|
Tuesday Night
Jul 14
|
Mostly Clear
|
70°F |
0 to 5 mph
W
|
|
Wednesday
Jul 15
|
Sunny
|
96°F |
0 to 5 mph
NW
|
|
Wednesday Night
Jul 15
|
Partly Cloudy
|
69°F |
0 to 5 mph
E
|
|
Thursday
Jul 16
|
Sunny
|
93°F |
0 to 5 mph
NE
|
|
Thursday Night
Jul 16
|
Mostly Clear
|
68°F |
0 to 5 mph
E
|
|
Friday
Jul 17
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
91°F |
0 to 10 mph
S
|
|
Friday Night
Jul 17
|
Slight Chance Showers And Thunderstorms
|
70°F |
5 to 10 mph
SW
|
|
Saturday
Jul 18
|
Slight Chance Showers And Thunderstorms
|
89°F |
5 to 10 mph
NW
|
|
Saturday Night
Jul 18
|
Slight Chance Showers And Thunderstorms
|
64°F |
5 to 10 mph
NE
|
|
Sunday
Jul 19
|
Slight Chance Showers And Thunderstorms
|
85°F |
5 to 10 mph
NE
|
|
Sunday Night
Jul 19
|
Slight Chance Showers And Thunderstorms
|
61°F |
5 to 10 mph
SE
|
|
Monday
Jul 20
|
Slight Chance Showers And Thunderstorms
|
81°F |
5 to 10 mph
W
|
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.
