Jamestown, IL Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Jamestown, IL in one place.
A chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 40%.
Local Weather Overview
This forecast page for Jamestown, IL 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: Apr 9, 2026 4:53 PM CDT.
The active forecast window currently covers Apr 14 to Apr 15, 2026 for Jamestown, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 14 to Apr 15, 2026
- Latest sync
- Apr 9, 2026 4:53 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Jamestown
Tuesday looks like the warmest upcoming period in Jamestown at 83 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 58 degrees F.
The strongest winds are forecast for Tuesday at about 13 to 18 mph S.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 9, 2026 4:53 PM CDT
- Coverage
- 2 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KLSX
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 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 50%.
A chance of showers and thunderstorms. Mostly cloudy, with a high near 80. Chance of precipitation is 50%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 58. Chance of precipitation is 40%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Apr 14
|
Chance Showers And Thunderstorms
|
83°F |
13 to 18 mph
S
|
|
Tuesday Night
Apr 14
|
Chance Showers And Thunderstorms
|
65°F |
16 mph
S
|
|
Wednesday
Apr 15
|
Chance Showers And Thunderstorms
|
80°F |
14 to 18 mph
SW
|
|
Wednesday Night
Apr 15
|
Chance Showers And Thunderstorms
|
58°F |
7 to 13 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Jamestown.