Saint Joseph, IL Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Saint Joseph, IL in one place.
Mostly sunny, with a high near 66. East wind around 9 mph.
Local Weather Overview
This forecast page for Saint Joseph, 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 2:26 PM CDT.
The active forecast window currently covers Apr 11 to Apr 15, 2026 for Saint Joseph, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 11 to Apr 15, 2026
- Latest sync
- Apr 9, 2026 2:26 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Saint Joseph
Tuesday looks like the warmest upcoming period in Saint Joseph at 84 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 54 degrees F.
The strongest winds are forecast for Sunday at about 13 to 25 mph SSW.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 9, 2026 2:26 PM CDT
- Coverage
- 5 days
- Time zone
- America/Chicago
- Forecast office
- ILX
- Radar station
- KILX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly cloudy, with a low around 55. South southeast wind 7 to 12 mph, with gusts as high as 20 mph.
Mostly cloudy, with a high near 78. South southwest wind 13 to 25 mph, with gusts as high as 36 mph.
A slight chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 80. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
A chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 84.
A chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 63.
Rain showers likely before 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 79.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 54.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Apr 11
|
Mostly Sunny
|
66°F |
9 mph
E
|
|
Saturday Night
Apr 11
|
Mostly Cloudy
|
55°F |
7 to 12 mph
SSE
|
|
Sunday
Apr 12
|
Mostly Cloudy
|
78°F |
13 to 25 mph
SSW
|
|
Sunday Night
Apr 12
|
Slight Chance Showers And Thunderstorms
|
62°F |
21 mph
SSW
|
|
Monday
Apr 13
|
Chance Showers And Thunderstorms
|
80°F |
20 mph
SW
|
|
Monday Night
Apr 13
|
Chance Showers And Thunderstorms
|
65°F |
16 mph
SSW
|
|
Tuesday
Apr 14
|
Chance Showers And Thunderstorms
|
84°F |
15 to 21 mph
SSW
|
|
Tuesday Night
Apr 14
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
63°F |
17 mph
SSW
|
|
Wednesday
Apr 15
|
Rain Showers Likely
|
79°F |
16 to 22 mph
SW
|
|
Wednesday Night
Apr 15
|
Chance Showers And Thunderstorms
|
54°F |
10 to 16 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Saint Joseph.