What is today's weather forecast for Swansea, IL?

Today's forecast for Swansea shows a high of 57 degrees and a low of 54 degrees Fahrenheit. Rain likely, mainly before 11am.

What is the 7-day weather forecast for Swansea, IL?

The 7-day forecast for Swansea shows highs from 51 to 65 degrees and lows from 41 to 54 degrees Fahrenheit. Expect precipitation on 5 days with chances of 20% or higher.

Will it rain in Swansea, IL this week?

Yes, rain is possible in Swansea this week. Precipitation chances: Thursday (80% chance), Friday (90% chance), Sunday (20% chance), Monday (70% chance), Tuesday (40% chance).

How accurate is the Swansea weather forecast?

WeatherForYou provides highly accurate Swansea forecasts using National Weather Service data and current conditions from the nearest available weather stations, often miles closer than regional airports, for the most precise local forecasts.

Swansea, IL Weather Forecast and Current Conditions

Current Conditions From Nearby Local Station

Switch to Metric Units

48°F
Feels Like 48°F

Humidity 96% Dew Point 47°F Wind SE 2 MPH Gusts 6 Barometer 29.99 in.761.7 mm

Solar Rad 60 w/m²

Report from a MADIS/MESONET weather station 2.3 miles SE of central Swansea
at 8:30 AM Thu, Nov 20, 2025

Point Forecast at a Glance

ThuNov 20

60%

FriNov 21

90%

SatNov 22

SunNov 23

MonNov 24

50%

TueNov 25

40%

WedNov 26

7-Day Temperature Trend

Week Ahead Summary

Variable high temperatures through the week, ranging from 51°F to 65°F. Unsettled weather expected with rain likely on at least 5 days.

Climate Context

This week's forecast shows temperatures running 3°F above the historical average for November. Normal highs for this period are around 56°F with lows around 36°F.

This Date in Weather History

1979 - A blizzard struck Cheyenne, WY, producing a record 19.8 inches of snow in 24 hours, and a record total of 25.6 inches in forty hours. Strong winds created huge drifts stopping all transportation.

Swansea, IL 7 Day Weather Forecast Details

Thursday Nov 20

Day: Rain likely, mainly before 11am. Patchy fog before 9am. Otherwise, cloudy, with a high near 57. Southeast wind 5 to 7 mph. Chance of precipitation is 60%.

Night: Rain, mainly after 8pm. Patchy fog after 8pm. Low around 54. Southeast wind 3 to 5 mph. Chance of precipitation is 80%.

Friday Nov 21

Day: Rain and possibly a thunderstorm. Patchy fog before noon. High near 65. East wind 5 to 9 mph becoming northeast in the afternoon. Chance of precipitation is 90%.

Night: Rain likely before midnight. Mostly cloudy, with a low around 47. Northeast wind around 7 mph. Chance of precipitation is 60%.

Saturday Nov 22

Day: Mostly sunny, with a high near 59. North wind 3 to 6 mph.

Night: Mostly clear, with a low around 41.

Sunday Nov 23

Day: Mostly sunny, with a high near 62.

Night: A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 44.

Monday Nov 24

Day: A 50 percent chance of rain. Mostly cloudy, with a high near 59.

Night: Rain likely. Mostly cloudy, with a low around 49. Chance of precipitation is 70%.

Tuesday Nov 25

Day: A 40 percent chance of rain. Partly sunny, with a high near 61.

Night: Mostly cloudy, with a low around 41.

Wednesday Nov 26

Day: Partly sunny, with a high near 51.

About Swansea, IL

Swansea is a village in St. Clair County, Illinois. It is a part of the St. Louis metropolitan area and Metro East in southern Illinois. It is surrounded by the communities of Fairview Heights, Belleville, O’Fallon, and Shiloh. The population was 13,430 at the 2010 census, an increase from 10,579 in 2000.

Content from Wikipedia, licensed under CC BY-SA 3.0.

How We Provide Better Local Weather

Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.

Forecasts: National Weather Service point forecasts predict for your specific area, not broad regional zones, making them far more relevant to your location.

Your favorites: