Oswego, IL Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Oswego, IL in one place.
A chance of showers and thunderstorms. Partly sunny, with a high near 81. South southwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Oswego, 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 14, 2026 6:21 PM CDT.
The active forecast window currently covers Apr 14 to Apr 20, 2026 for Oswego, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 14 to Apr 20, 2026
- Latest sync
- Apr 14, 2026 6:21 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Oswego
This Afternoon looks like the warmest upcoming period in Oswego at 81 degrees F.
Sunday Night is the coolest period ahead with temperatures near 33 degrees F.
The strongest winds are forecast for Saturday at about 15 to 20 mph WSW.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 14, 2026 6:21 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- LOT
- Radar station
- KLOT
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Showers and thunderstorms likely before 1am, then showers and thunderstorms likely between 1am and 2am, then a chance of showers and thunderstorms between 2am and 5am, then showers and thunderstorms likely. Mostly cloudy. Low around 63, with temperatures rising to around 66 overnight. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Showers and thunderstorms. Mostly cloudy, with a high near 74. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Showers and thunderstorms before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 60. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 73. West southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 52. Chance of precipitation is 50%.
Partly sunny, with a high near 79.
A chance of showers and thunderstorms between 7pm and 1am, then showers and thunderstorms. Mostly cloudy, with a low around 54.
Showers and thunderstorms. Mostly cloudy, with a high near 66.
A chance of rain showers before 1am. Partly cloudy, with a low around 35.
Mostly sunny, with a high near 52.
Mostly clear, with a low around 33.
Sunny, with a high near 58.
Mostly clear, with a low around 40.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Apr 14
|
Chance Showers And Thunderstorms
|
81°F |
15 mph
SSW
|
|
Tonight
Apr 14
|
Showers And Thunderstorms Likely
|
63°F |
10 to 15 mph
SSW
|
|
Wednesday
Apr 15
|
Showers And Thunderstorms
|
74°F |
10 to 15 mph
SSW
|
|
Wednesday Night
Apr 15
|
Showers And Thunderstorms
|
60°F |
10 to 15 mph
SW
|
|
Thursday
Apr 16
|
Chance Showers And Thunderstorms
|
73°F |
10 mph
WSW
|
|
Thursday Night
Apr 16
|
Chance Showers And Thunderstorms then Partly Cloudy
|
52°F |
5 to 10 mph
NNE
|
|
Friday
Apr 17
|
Partly Sunny
|
79°F |
5 to 15 mph
SE
|
|
Friday Night
Apr 17
|
Chance Showers And Thunderstorms
|
54°F |
15 mph
S
|
|
Saturday
Apr 18
|
Showers And Thunderstorms
|
66°F |
15 to 20 mph
WSW
|
|
Saturday Night
Apr 18
|
Chance Rain Showers
|
35°F |
15 to 20 mph
W
|
|
Sunday
Apr 19
|
Mostly Sunny
|
52°F |
15 to 20 mph
WNW
|
|
Sunday Night
Apr 19
|
Mostly Clear
|
33°F |
5 to 15 mph
NW
|
|
Monday
Apr 20
|
Sunny
|
58°F |
5 to 10 mph
ESE
|
|
Monday Night
Apr 20
|
Mostly Clear
|
40°F |
10 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Oswego.
