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Oswego, IL Weather Forecast

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Oswego, IL Weather Forecast

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Oswego IL weather - Clear - 80°F
Clear
80°F
Updated 5:07 pm
Feels Like 84°F
Humidity 43%
Wind SE 8 mph
Barometer  29.91 in
Dew Point 56°F
Oswego IL weather - Clear - 27°C
Clear
27°C
Updated 5:07 pm
Feels Like 29°C
Humidity 43%
Wind SE 13 km/h
Barometer  101.2 kPa
Dew Point 13°C
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Oswego Weather Forecast

THIS AFTERNOON TONIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT
Oswego, IL Weather - This Afternoon Partly Cloudy Oswego, IL Weather - Tonight Partly Cloudy Oswego, IL Weather - Saturday Partly Cloudy Oswego, IL Weather - Saturday Night Partly Cloudy Oswego, IL Weather - Sunday Chance Of Showers Oswego, IL Weather - Sunday Night Chance Of Showers Oswego, IL Weather - Monday Chance Of Showers Oswego, IL Weather - Monday Night Chance Of T-Storm Oswego, IL Weather - Tuesday Chance Of T-Storm Oswego, IL Weather - Tuesday Night Chance Of T-Storm Oswego, IL Weather - Wednesday Showers Likely Oswego, IL Weather - Wednesday Night Showers
Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Chance of Showers Chance of Showers Chance of Showers Chance of T-Storm Chance of T-Storm Chance of T-Storm Showers Likely Showers
Hi: 79°FHi: 26°C
 Lo: 65°FLo: 18°C Hi: 85°FHi: 29°C
 Lo: 60°FLo: 16°C Hi: 79°FHi: 26°C
 Lo: 55°FLo: 13°C Hi: 75°FHi: 24°C
 Lo: 65°FLo: 18°C Hi: 85°FHi: 29°C
 Lo: 65°FLo: 18°C Hi: 79°FHi: 26°C
 Lo: 61°FLo: 16°C
POP: 30% POP: 30% POP: 30% POP: 20% POP: 60% POP: 80% POP: 70% POP: 70%
POP = Probability of Precipitation.
Weather Outlook Updated: 120 PM CDT Fri Sep 11 2026 Oswego, IL Weather - WeatherWorld.com

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Issued: 209 PM CDT Fri Sep 11 2026

Key Messages

  • Dry and mild through Saturday before rain chances begin to increase later Sunday.
  • Waves of heavy rain producing thunderstorms possible in the general region early to mid next week.

Discussion

... Issued at 209 PM CDT Fri Sep 11 2026

A slow-moving compact wave along an elongated trough from Arkansas to southern Indiana will drift northeastward across Indiana through tonight. Upper-level clouds associated with the trough will continue to filter northward over the area through tonight. Mea...