Live Weather & Forecast
Weather in Swansea
Illinois, United States · Real-time conditions & 3-day outlook
18°C
Feels like 18°C
64°F / Feels 64°F
Partly cloudy
Swansea, Illinois
🌙 Nighttime
Updated: 2026-04-16 01:00
Humidity
97%
Wind
20.5 km/h W
Wind Gust
37.1 km/h
Pressure
1011 mb
Visibility
16 km
UV Index
0
(Low)
Precipitation
2.04 mm
Cloud Cover
75%
Dew Point
15.2°C
Wind Degree
260°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
170.9 μg/m³
NO₂
5.5 μg/m³
O₃
70 μg/m³
SO₂
2.2 μg/m³
PM 2.5
3.8 μg/m³
PM 10
4 μg/m³
Today's Hourly Forecast
24-hour breakdown for Swansea, Illinois
12 AM
18°
Patchy light rain
1 AM
18°
Partly cloudy
2 AM
17°
Patchy rain nearby
3 AM
16°
Patchy rain nearby
4 AM
16°
Patchy rain nearby
5 AM
16°
Patchy rain nearby
6 AM
16°
Patchy rain nearby
7 AM
16°
Patchy rain nearby
8 AM
17°
Sunny
9 AM
18°
Sunny
10 AM
20°
Sunny
11 AM
21°
Sunny
12 PM
25°
Sunny
1 PM
27°
Sunny
2 PM
29°
Sunny
3 PM
29°
Sunny
4 PM
29°
Sunny
5 PM
28°
Sunny
6 PM
28°
Sunny
7 PM
25°
Sunny
8 PM
23°
Clear
9 PM
21°
Clear
10 PM
20°
Clear
11 PM
19°
Clear
3-Day Forecast
Daily overview for Swansea, Illinois
Today
Moderate rain
30°
/
15°
🌧️ 85% chance of rain
💧 Avg. humidity: 72%
💨 Max wind: 20.9 km/h
🌧️ Total precip: 11.12 mm
☀️ UV Index: 1.8
🌅 Sunrise: 06:22 AM
🌇 Sunset: 07:38 PM
🌙 Waning Crescent
🌑 Moon: 3% lit
Fri, Apr 17
Overcast
30°
/
16°
🌧️ 0% chance of rain
💧 Avg. humidity: 78%
💨 Max wind: 35.3 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 2
🌅 Sunrise: 06:21 AM
🌇 Sunset: 07:39 PM
🌙 New Moon
🌑 Moon: 0% lit
Sat, Apr 18
Moderate rain
14°
/
7°
🌧️ 83% chance of rain
💧 Avg. humidity: 67%
💨 Max wind: 34.2 km/h
🌧️ Total precip: 16 mm
☀️ UV Index: 1.4
🌅 Sunrise: 06:19 AM
🌇 Sunset: 07:40 PM
🌙 Waxing Crescent
🌑 Moon: 1% lit
Best Time to Visit Swansea
Plan your trip to Swansea, 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.
Frequently Asked Questions
What is the current weather in Swansea?
Current conditions in Swansea: Partly cloudy, temperature 18°C, humidity 97%.
What is the best time to visit Swansea?
The best time to visit Swansea is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Swansea?
Swansea is located at approximately 38.5° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Swansea?
The wettest period in Swansea is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Swansea?
For visits to Swansea during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Swansea in?
Swansea is located in United States, in the state of Illinois.
What are the public holidays in Swansea in 2026?
View the 2026 public holidays for Swansea on our Holidays page.
What are the GPS coordinates used for the weather forecast in Swansea?
The weather forecast for Swansea uses coordinates 38.5339, -89.989.