Live Weather & Forecast

Weather in Oswego

Illinois, United States · Real-time conditions & 3-day outlook

Flag of United States
Sunny
26°C
Feels like 27°C
79°F / Feels 81°F
Sunny
Oswego, Illinois
🌞 Daytime
Updated: 2026-04-12 12:15
💧
Humidity
50%
💨
Wind
31.7 km/h SSW
🌬️
Wind Gust
41.2 km/h
🌡️
Pressure
1013 mb
👁️
Visibility
13 km
☀️
UV Index
5.6 (Moderate)
🌧️
Precipitation
0 mm
☁️
Cloud Cover
0%
💦
Dew Point
17.3°C
🌐
Wind Degree
210°

Air Quality Index

US EPA: Good UK DEFRA: Low (1)
CO
156.9 μg/m³
NO₂
4.8 μg/m³
O₃
105 μg/m³
SO₂
2.6 μg/m³
PM 2.5
7.7 μg/m³
PM 10
8.2 μg/m³

Weather Alerts 1

Met · Severe · Immediate
Flood Warning issued April 11 at 9:24PM CDT until April 14 at 7:00PM CDT by NWS Chicago IL

...The Flood Warning continues for the following rivers in Illinois...Indiana... Fox River at Algonquin Lock & Dam tailwater affecting Lake IL, McHenry and Kane Counties. Kankakee River at Dunns Bridge affecting Jasper and Porter Counties. Kankakee River at Shelby affecting Newton and Lake IN Counties. ...The Flood Warning is extended for the following rivers in Illinois... Des Plaines River...

A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation...

Effective: 2026-04-11T21:24:00-05:00  ·  Expires: 2026-04-12T15:30:00-05:00

Today's Hourly Forecast

24-hour breakdown for Oswego, Illinois

12 AM
Clear
11°
Clear
💧 71% 💨 16.9 km/h
1 AM
Clear
11°
Clear
💧 72% 💨 15.5 km/h
2 AM
Clear
11°
Clear
💧 74% 💨 17.3 km/h
3 AM
Clear
11°
Clear
💧 73% 💨 18 km/h
4 AM
Clear
11°
Clear
💧 78% 💨 18.7 km/h
5 AM
Clear
11°
Clear
💧 83% 💨 19.8 km/h
6 AM
Clear
12°
Clear
💧 86% 💨 22.3 km/h
7 AM
Sunny
13°
Sunny
💧 87% 💨 23.8 km/h
8 AM
Sunny
16°
Sunny
💧 84% 💨 24.8 km/h
9 AM
Sunny
18°
Sunny
💧 78% 💨 25.9 km/h
10 AM
Sunny
22°
Sunny
💧 71% 💨 29.5 km/h
11 AM
Sunny
25°
Sunny
💧 64% 💨 31.3 km/h
12 PM
Sunny
26°
Sunny
💧 50% 💨 31.7 km/h
1 PM
Sunny
27°
Sunny
💧 48% 💨 32.8 km/h
2 PM
Sunny
28°
Sunny
💧 45% 💨 33.5 km/h
3 PM
Sunny
29°
Sunny
💧 44% 💨 31.7 km/h
4 PM
Sunny
26°
Sunny
💧 45% 💨 27.4 km/h
5 PM
Overcast
24°
Overcast
💧 66% 💨 18.7 km/h
6 PM
Overcast
21°
Overcast
💧 71% 💨 18 km/h
7 PM
Light rain shower
21°
Light rain shower
💧 92% 💨 19.1 km/h 🌧️ 100%
8 PM
Overcast
20°
Overcast
💧 78% 💨 29.2 km/h
9 PM
Overcast
19°
Overcast
💧 84% 💨 28.4 km/h
10 PM
Overcast
18°
Overcast
💧 82% 💨 31.7 km/h
11 PM
Overcast
17°
Overcast
💧 97% 💨 29.5 km/h

3-Day Forecast

Daily overview for Oswego, Illinois

Today
Patchy rain nearby
Patchy rain nearby
29° / 10°
🌧️ 61% chance of rain
💧 Avg. humidity: 72%
💨 Max wind: 33.5 km/h
🌧️ Total precip: 1.59 mm
☀️ UV Index: 1.1
🌅 Sunrise: 06:18 AM
🌇 Sunset: 07:31 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Moderate rain
Moderate rain
23° / 16°
🌧️ 87% chance of rain
💧 Avg. humidity: 91%
💨 Max wind: 29.9 km/h
🌧️ Total precip: 16.37 mm
☀️ UV Index: 1.1
🌅 Sunrise: 06:16 AM
🌇 Sunset: 07:32 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Thundery outbreaks in nearby
Thundery outbreaks in nearby
26° / 19°
🌧️ 0% chance of rain
💧 Avg. humidity: 87%
💨 Max wind: 36.7 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 0.8
🌅 Sunrise: 06:15 AM
🌇 Sunset: 07:33 PM
🌙 Waning Crescent
🌑 Moon: 15% lit

Best Time to Visit Oswego

Plan your trip to Oswego, United States around the most favorable weather conditions.

Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
← Back to Oswego 🗓 View Holidays 2026

Frequently Asked Questions

What is the current weather in Oswego?
Current conditions in Oswego: Sunny, temperature 26°C, humidity 50%.
What is the best time to visit Oswego?
The best time to visit Oswego is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Oswego?
Oswego is located at approximately 41.7° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Oswego?
The wettest period in Oswego is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Oswego?
For visits to Oswego during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Oswego in?
Oswego is located in United States, in the state of Illinois.
What are the public holidays in Oswego in 2026?
View the 2026 public holidays for Oswego on our Holidays page.
What are the GPS coordinates used for the weather forecast in Oswego?
The weather forecast for Oswego uses coordinates 41.6835, -88.3526.