Local weather forecast

Weather in Oswego, IL

Updated 2026-08-11 12:45 local time · ZIP codes 60543

Light rain
Now68°F

Light rain

High / Low85° / 73°
Rain chance83%
Wind6 mph
Weather alerts

Active alerts

3
Flood Advisory issued August 11 at 9:59AM CDT until August 11 at 2:00PM CDT by NWS Chicago IL

* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Northern Grundy County in northeastern Illinois... Kane County in northeastern Illinois... Kendall County in northeastern Illinois... * WHEN...Until 200 PM CDT. * IMPACTS...Flooding may occur in poor drainage and urban areas. Roads and streets may be flooded. * ADDITIONAL DETAILS... - At 959 AM CDT, Doppler radar and automated rain gauges indicated a line of intense thunderstorms with rainfall rates of 1 to 2 inches per hour moving into the area. Localized flooding of roadways and poor drainage areas will occur slightly after the onset of rainfall. - Some locations that will experience flooding include... Aurora, Elgin, Carpentersville, St. Charles, Oswego, Algonquin, Batavia, Huntley, Geneva, Yorkville, Morris, Channahon, Campton Hills, Minooka and Plano. - http://www.weather.gov/safety/flood

Safety instructions

A Flood Advisory means minor flooding along waterways and other poor drainage areas is imminent or may already be occurring. Persons in the advisory area should use caution and avoid flood waters.

Tornado Warning issued August 11 at 10:27AM CDT until August 11 at 11:30AM CDT by NWS Chicago IL

TORLOT The National Weather Service in Chicago has issued a * Tornado Warning for... Southeastern Kendall County in northeastern Illinois... Will County in northeastern Illinois... Northeastern Grundy County in northeastern Illinois... Northeastern Kankakee County in northeastern Illinois... * Until 1130 AM CDT. * At 1027 AM CDT, severe thunderstorms capable of producing both tornadoes and extensive straight line wind damage were located near Minooka, moving east at 55 mph. HAZARD...Tornado. SOURCE...Radar indicated rotation. IMPACT...Flying debris will be dangerous to those caught without shelter. Mobile homes will be damaged or destroyed. Damage to roofs, windows, and vehicles will occur. Tree damage is likely. * These dangerous storms will be near... Joliet, Channahon, Minooka, Shorewood, and Elwood around 1035 AM CDT. Manhattan around 1040 AM CDT. New Lenox around 1045 AM CDT. Other locations in the path of this tornadic thunderstorm include Mokena, Frankfort, University Park, Monee, Park Forest, Steger and Crete.

Safety instructions

Heavy rainfall may hide this tornado. Do not wait to see or hear the tornado. TAKE COVER NOW! This cluster of thunderstorms is capable of producing tornadoes and widespread significant wind damage. Do not wait to see or hear the tornado. For your protection move to an interior room on the lowest floor of a building.

Tornado Warning issued August 11 at 10:37AM CDT until August 11 at 11:30AM CDT by NWS Chicago IL

At 1036 AM CDT, a severe squall line capable of producing both tornadoes and extensive straight line wind damage was located near Elwood, or near Wilmington, moving east at 60 mph. HAZARD...Tornado. SOURCE...Radar indicated rotation. IMPACT...Flying debris will be dangerous to those caught without shelter. Mobile homes will be damaged or destroyed. Damage to roofs, windows, and vehicles will occur. Tree damage is likely. These dangerous storms will be near... Wilmington and Elwood around 1040 AM CDT. Manhattan around 1045 AM CDT. Other locations in the path of this tornadic thunderstorm include Peotone, Monee and Beecher.

Safety instructions

Heavy rainfall may hide this tornado. Do not wait to see or hear the tornado. TAKE COVER NOW! This cluster of thunderstorms is capable of producing tornadoes and widespread significant wind damage. Do not wait to see or hear the tornado. For your protection move to an interior room on the lowest floor of a building.

Hourly

Next hours

NowLight rain68°86% rain
2 PMPatchy rain nearby78°32% rain
3 PMSunny85°11% rain
4 PMSunny85°11% rain
5 PMSunny84°11% rain
6 PMSunny82°12% rain
7 PMSunny80°11% rain
8 PMClear77°17% rain
9 PMClear76°14% rain
10 PMClear75°20% rain
11 PMClear76°21% rain
12 AMFog70°42% rain
Forecast

3-day weather forecast

Today2026-08-11
Sunny
85° 73°Sunny
Rain 83%Gust 8 mph
Tomorrow2026-08-12
Sunny
81° 68°Sunny
Rain 85%Gust 16 mph
Thursday2026-08-13
Sunny
80° 65°Sunny
Rain 50%Gust 6 mph
Conditions

Weather details

Feels like68°F
Humidity94%
Pressure29.91 inHg
Visibility9 mi
Wind6 mph S
Wind gusts9 mph
Precipitation0.62 in
UV index2
Daylight

Sunrise, sunset and moon

Sunrise05:57 AM
Sunset07:59 PM
Moonrise03:56 AM
Moon phaseNew Moon
Practical guide

Weather insights for today

Take an umbrella

Rain chance reaches about 70% over the next 12 hours.

Light layers should work

It feels like 68°F with winds near 6 mph.

Best window: 7 PM

80°F, 11% rain chance and 4 mph wind.

Use extra caution while driving

Visibility is around 9 mi; gusts may reach 12 mph.

Running conditions are less comfortable

Current temperature is 68°F, wind 6 mph, rain chance up to 70%.

Low UV protection needs

UV index is 2.

Oswego weather today

Light rain and 68°F in Oswego, IL. Today's high is 85°F with a 83% rain chance. Winds are around 6 mph with gusts near 9 mph. Relative humidity is 94%, pressure is 29.91 inHg, and visibility is about 9 miles.

Tonight and tomorrow in Oswego

Sunrise is at 05:57 AM and sunset is at 07:59 PM. Tomorrow's forecast calls for Sunny with a high near 81°F and a low near 68°F. The maximum rain chance is 85%.

Nearby

Weather near Oswego

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