Jefferson County, IA Weather Forecast
County weather hub
Slight Chance Showers And Thunderstorms
Compare major city weather across Jefferson County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 93. Heat index values as high as 103. Northwest wind around 10 mph. Chance of precipitation is 20%.
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 2 of 2 mapped cities in Jefferson County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Jul 18 to Jul 24, 2026
- Latest sync
- Jul 18, 2026 6:03 PM CDT
- Forecast office
- DVN
- Source
- NOAA / NWS
Daily Outlook
This Week in Jefferson County
Monday looks like the warmest upcoming period in Jefferson County at 95 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 61 degrees F.
The strongest winds are forecast for Tuesday at about 10 to 15 mph NW.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 18, 2026 6:03 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- DVN
- Radar station
- KDVN
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 67. North wind 5 to 10 mph. Chance of precipitation is 30%.
Patchy smoke after 7am. Sunny, with a high near 89. East wind around 5 mph.
Patchy smoke before 1am. Mostly clear, with a low around 69. Southeast wind around 5 mph.
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 95.
A chance of showers and thunderstorms before 4am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 74. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 7am. Sunny, with a high near 88. Chance of precipitation is 50%.
Clear, with a low around 64.
Sunny, with a high near 84.
Mostly clear, with a low around 61.
A slight chance of rain showers between 7am and 1pm. Mostly sunny, with a high near 84.
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64.
A slight chance of showers and thunderstorms. Partly sunny, with a high near 86.
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 66.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Jul 18
|
Slight Chance Showers And Thunderstorms
|
93°F |
10 mph
NW
|
|
Tonight
Jul 18
|
Chance Showers And Thunderstorms then Partly Cloudy
|
67°F |
5 to 10 mph
N
|
|
Sunday
Jul 19
|
Patchy Smoke
|
89°F |
5 mph
E
|
|
Sunday Night
Jul 19
|
Patchy Smoke
|
69°F |
5 mph
SE
|
|
Monday
Jul 20
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
95°F |
5 to 10 mph
S
|
|
Monday Night
Jul 20
|
Chance Showers And Thunderstorms
|
74°F |
10 mph
S
|
|
Tuesday
Jul 21
|
Chance Showers And Thunderstorms then Sunny
|
88°F |
10 to 15 mph
NW
|
|
Tuesday Night
Jul 21
|
Clear
|
64°F |
5 to 15 mph
N
|
|
Wednesday
Jul 22
|
Sunny
|
84°F |
5 mph
N
|
|
Wednesday Night
Jul 22
|
Mostly Clear
|
61°F |
5 mph
NE
|
|
Thursday
Jul 23
|
Slight Chance Rain Showers
|
84°F |
5 mph
SE
|
|
Thursday Night
Jul 23
|
Partly Cloudy then Slight Chance Showers And Thunderstorms
|
64°F |
5 to 10 mph
SE
|
|
Friday
Jul 24
|
Slight Chance Showers And Thunderstorms
|
86°F |
5 to 10 mph
SE
|
|
Friday Night
Jul 24
|
Slight Chance Showers And Thunderstorms
|
66°F |
5 to 10 mph
SE
|
Major City Forecasts
Live forecast snapshots for major cities across Jefferson County.
Coverage
Forecast coverage currently spans 2 of 2 mapped cities in Jefferson County.
Largest mapped city population in this region: 10,500.
