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Oswego, IL 60543 Weather
Current conditions
Observed at Lewis University Airport · 1 hr ago
Forecast
10-day-
Today
Sunny. High near 69, with temperatures falling to around 66 in the afternoon. East southeast wind 0 to 5 mph.
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Tonight
Mostly clear, with a low around 41. East wind 0 to 5 mph.
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Wednesday
Sunny. High near 72, with temperatures falling to around 68 in the afternoon. South southwest wind around 0 mph.
National Weather Service forecast updated 5 hrs ago.
Hourly
Hourly forecast- Now69°
- 4 PM69°
- 5 PM66°
- 6 PM62°
- 7 PM58°
- 8 PM55°
- 9 PM53°
- 10 PM51°
- 11 PM49°
- Wed12 AM48°
- 1 AM47°
- 2 AM46°
- 3 AM44°
- 4 AM43°
- 5 AM42°
- 6 AM42°
- 7 AM41°
- 8 AM43°
- 9 AM50°
- 10 AM55°
- 11 AM61°
- 12 PM65°
- 1 PM68°
- 2 PM70°
10-day forecast
Details- TodayOct 20Sunny41°69°
- WedOct 21Sunny46°72°
- ThuOct 22Sunny47°72°
- FriOct 23Sunny46°69°
- SatOct 24Mostly Sunny50°69°
- SunOct 25Partly Sunny48°71°
- MonOct 26Partly Sunny16%45°66°
- TueOct 27Cloudy43°54°
- WedOct 28Cloudy0.02 in43°51°
- ThuOct 29Sunny40°55°
Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.
Radar
Full mapWeather news near Oswego
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Air quality
Acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.
Forecast
- TueModerate
- WedModerate
- ThuModerate
Aurora and Elgin, IL reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Almanac
MonthlyAurora Water, records since 1887. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
- Aurora 9 km
- Joliet 28 km
- Naperville 20 km
- Elgin 40 km
- Cicero 52 km
- Arlington Heights 54 km
- Schaumburg 44 km
- Bolingbrook 23 km
- Palatine 54 km
- Des Plaines 54 km
- Orland Park 41 km
- Tinley Park 48 km
Forecasters' discussion
From the National Weather Service office in LOT, issued 9 hrs ago
Key Messages
- Some ground fog may develop within 10-15 miles of Lake Michigan during early morning hours the next few days. Any fog would then quickly dissipate after sunrise.
- An extended period of dry and above to much above average temperatures is expected through the upcoming weekend.
Discussion
Issued at 154 AM CDT Tue Oct 20 2026
No significant weather is expected through the upcoming weekend with above to much above average temperatures each day. Generally light winds should allow weak lake breezes to form each of the next several afternoons, but only result in slightly cooler conditions right near the lake. A modest increase in moisture in the wake of the afternoon lake breezes could allow for some ground fog to form during the early morning hours the next few days. Otherwise, look for mostly sunny conditions for the remainder of the work week.
- Borchardt/Izzi
Aviation
Issued at 620 AM CDT Tue Oct 20 2026
Key Aviation Messages for the current TAF period:
- Patchy fog, locally dense, expected through sunrise today for Chicago terminals north of a KARR to KMDW line
- Another chance for fog tomorrow morning for terminals closer to the lake
A locally dense fog bank is slowly moving west-southwest through northeastern Illinois this morning. The densest portion of this fog dropped visibilities at KORD down to 1/8SM. This fog is expected to impact terminals north of a KARR to KMDW line. Some MVFR vis may develop south of this border, but there is lower confidence in dense fog currently. Once the sun rises, visibilities are expected to improve back to VFR conditions.
Winds are expected to be light and mostly out of the east- southeast today. Clear skies are expected tonight with light, if not calm, winds across the area leading to another chance for fog developing closer to the lake, similar to what is happening this morning. A TEMPO was added for tomorrow morning introducing reduced vis which can be adjusted in later TAF packages with updated confidence in fog development.
Lot Watches
IL...Dense Fog Advisory until 9 AM CDT this morning for ILZ005- ILZ006-ILZ013-ILZ103-ILZ104.
IN...None. LM...None.
Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Conservative index and reflects what the press published. Terms of use.