Illinois · NWS LOT office

Oswego, IL weather

It is 54°F and mostly cloudy at Aurora Municipal Airport as of Oct 28, 1:15 AM CDT. Overnight: Partly Cloudy, low near 50°F, 2% chance of precipitation. Forecast from the National Weather Service, issued Oct 28, 1:20 AM CDT.

Updated Oct 28, 1:25 AM CDT (snapshot)

Current conditions

Temperature

54°F

Mostly Cloudy

Wind

S 5 mph

Humidity 82% · dew point 48°F

Pressure · visibility

30.19 inHg

Visibility 7 mi

Observed at Aurora Municipal Airport (KARR), Oct 28, 1:15 AM CDT. Station readings can lag or be missing.

Alerts for this area

No active NWS alerts cover the Oswego forecast zone right now.

Around the NWS LOT forecast area

No active alerts in zones served by the LOT office near Oswego.

From the alert snapshot of Oct 28, 2026, 2:15 AM EDT. No alerts are active anywhere in Illinois.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for Oswego (local time)
TimeTempForecastPrecip. chanceWind
Wed 1 AM54°FMostly Cloudy2%S 5 mph
Wed 2 AM53°FMostly Cloudy2% 0 mph
Wed 3 AM52°FPartly Cloudy2% 0 mph
Wed 4 AM52°FPartly Cloudy2% 0 mph
Wed 5 AM51°FMostly Clear2% 0 mph
Wed 6 AM50°FSunny2% 0 mph
Wed 7 AM50°FSunny1% 0 mph
Wed 8 AM51°FSunny1%S 5 mph
Wed 9 AM55°FSunny0%S 5 mph
Wed 10 AM60°FSunny0%S 5 mph
Wed 11 AM64°FSunny0%S 10 mph
Wed 12 PM68°FSunny0%S 10 mph
Wed 1 PM71°FSunny0%S 10 mph
Wed 2 PM73°FSunny0%S 10 mph
Wed 3 PM74°FSunny1%S 15 mph
Wed 4 PM74°FMostly Sunny1%S 10 mph
Wed 5 PM72°FMostly Sunny1%S 10 mph
Wed 6 PM69°FPartly Cloudy1%S 10 mph
Wed 7 PM66°FMostly Clear2%S 10 mph
Wed 8 PM64°FMostly Clear2%S 10 mph
Wed 9 PM63°FMostly Clear2%S 10 mph
Wed 10 PM62°FMostly Clear2%S 10 mph
Wed 11 PM62°FMostly Clear3%S 10 mph
Thu 12 AM61°FMostly Clear3%S 10 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in Oswego can differ.

7-day forecast

Overnight

Low 50°F

Partly cloudy, with a low around 50. South wind 0 to 5 mph.

Wednesday

High 74°F·Low 58°F

Sunny. High near 74, with temperatures falling to around 72 in the afternoon. South wind 0 to 15 mph.

Wednesday Night: A slight chance of rain showers after 5am. Partly cloudy, with a low around 58. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

Thursday

High 70°F·Low 43°F

A slight chance of rain showers before 2pm. Mostly sunny, with a high near 70. West wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

Thursday Night: Mostly clear, with a low around 43. North wind around 5 mph, with gusts as high as 10 mph.

Friday

High 65°F·Low 50°F

Partly sunny, with a high near 65.

Friday Night: A chance of rain showers between 7pm and 1am, then a chance of showers and thunderstorms. Cloudy, with a low around 50.

Saturday

High 63°F·Low 50°F

A chance of showers and thunderstorms. Cloudy, with a high near 63.

Saturday Night: A chance of rain showers. Mostly cloudy, with a low around 50.

Sunday

High 66°F·Low 52°F

A chance of rain showers. Mostly cloudy, with a high near 66.

Sunday Night: A chance of rain showers. Mostly cloudy, with a low around 52.

Monday

High 67°F·Low 53°F

A chance of rain showers. Mostly cloudy, with a high near 67.

Monday Night: A chance of rain showers. Mostly cloudy, with a low around 53.

Tuesday

High 67°F

Rain showers likely. Mostly cloudy, with a high near 67.

Nearby cities

Larger cities in the area

Other cities in Kendall County

See every city we cover in Illinois, or check all active alerts.

About this forecast

Forecast office
Oswego is served by the National Weather Service LOT forecast office, forecast zone ILZ020, county zone ILC093.
Location used
The Census Bureau's internal point for Oswego (41.6832, -88.3388), in Kendall County. Population: 38,778 (2024 estimate), number 45 of the 121 Illinois cities on this site.
Radar
Nearest NWS radar: KLOT. View it on radar.weather.gov.

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Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/41.6832,-88.3388 (forecast issued Oct 28, 1:20 AM CDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

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