Saint Jacob, IL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Saint Jacob, IL in one place.
Sunny, with a high near 63.
Local Weather Overview
This forecast page for Saint Jacob, 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 15, 2026 11:07 PM CDT.
The active forecast window currently covers Apr 19 to Apr 22, 2026 for Saint Jacob, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 19 to Apr 22, 2026
- Latest sync
- Apr 15, 2026 11:07 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Saint Jacob
Wednesday looks like the warmest upcoming period in Saint Jacob at 77 degrees F.
Sunday Night is the coolest period ahead with temperatures near 41 degrees F.
The strongest winds are forecast for Tuesday at about 8 to 15 mph SW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 15, 2026 11:07 PM CDT
- Coverage
- 4 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
Clear, with a low around 41.
Sunny, with a high near 70.
Mostly clear, with a low around 50.
Sunny, with a high near 76.
A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 55. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 77. Chance of precipitation is 20%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
Apr 19
|
Sunny
|
63°F |
6 to 14 mph
NW
|
|
Sunday Night
Apr 19
|
Clear
|
41°F |
5 to 9 mph
NE
|
|
Monday
Apr 20
|
Sunny
|
70°F |
5 to 12 mph
S
|
|
Monday Night
Apr 20
|
Mostly Clear
|
50°F |
10 mph
S
|
|
Tuesday
Apr 21
|
Sunny
|
76°F |
8 to 15 mph
SW
|
|
Tuesday Night
Apr 21
|
Mostly Clear then Slight Chance Showers And Thunderstorms
|
55°F |
7 to 12 mph
SW
|
|
Wednesday
Apr 22
|
Slight Chance Showers And Thunderstorms
|
77°F |
7 to 13 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Saint Jacob.