Janesville, IA Weather Forecast
Local 7-day forecast
Slight Chance Rain Showers then Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Janesville, IA in one place.
A slight chance of rain showers before 7am. Sunny, with a high near 82. Northwest wind 10 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Janesville, IA is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Jul 19, 2026 10:18 AM CDT.
The active forecast window currently covers Jul 21 to Jul 25, 2026 for Janesville, IA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 21 to Jul 25, 2026
- Latest sync
- Jul 19, 2026 10:18 AM CDT
- Forecast office
- DMX
- Source
- NOAA / NWS
Daily Outlook
This Week in Janesville
Saturday looks like the warmest upcoming period in Janesville at 85 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 58 degrees F.
The strongest winds are forecast for Tuesday at about 10 to 20 mph NW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 19, 2026 10:18 AM CDT
- Coverage
- 5 days
- Time zone
- America/Chicago
- Forecast office
- DMX
- Radar station
- KDMX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 60.
Sunny, with a high near 78.
Partly cloudy, with a low around 58.
Mostly sunny, with a high near 80.
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 61. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 80. Chance of precipitation is 30%.
Partly cloudy, with a low around 63.
Mostly sunny, with a high near 85.
Mostly clear, with a low around 66.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Jul 21
|
Slight Chance Rain Showers then Sunny
|
82°F |
10 to 20 mph
NW
|
|
Tuesday Night
Jul 21
|
Mostly Clear
|
60°F |
6 to 15 mph
N
|
|
Wednesday
Jul 22
|
Sunny
|
78°F |
6 mph
N
|
|
Wednesday Night
Jul 22
|
Partly Cloudy
|
58°F |
1 to 5 mph
SSE
|
|
Thursday
Jul 23
|
Mostly Sunny
|
80°F |
2 to 7 mph
S
|
|
Thursday Night
Jul 23
|
Mostly Cloudy then Chance Showers And Thunderstorms
|
61°F |
6 mph
SSE
|
|
Friday
Jul 24
|
Chance Showers And Thunderstorms
|
80°F |
5 to 9 mph
SSE
|
|
Friday Night
Jul 24
|
Partly Cloudy
|
63°F |
5 to 9 mph
SE
|
|
Saturday
Jul 25
|
Mostly Sunny
|
85°F |
7 mph
SE
|
|
Saturday Night
Jul 25
|
Mostly Clear
|
66°F |
6 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Janesville.