National Weather Service forecast
Swansea, Illinois Weather
Swansea 7-Day Forecast
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Overnight55°FSlight Chance Light Rain16% chance of precipitation
A slight chance of rain before 3am, then a slight chance of drizzle. Mostly cloudy, with a low around 55. Southwest wind around 8 mph. Chance of precipitation is 20%.
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Wednesday63°FSlight Chance Drizzle then Mostly Cloudy10% chance of precipitation
A slight chance of drizzle before 7am. Mostly cloudy, with a high near 63. West wind 7 to 13 mph.
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Wednesday Night46°FPartly Cloudy
Partly cloudy, with a low around 46. West wind around 6 mph.
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Thursday65°FSunny
Sunny. High near 65, with temperatures falling to around 60 in the afternoon. West wind 5 to 10 mph.
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Thursday Night48°FPartly Cloudy2% chance of precipitation
Partly cloudy, with a low around 48. Northwest wind around 5 mph.
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Friday57°FPartly Sunny1% chance of precipitation
Partly sunny. High near 57, with temperatures falling to around 53 in the afternoon.
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Friday Night37°FPartly Cloudy
Partly cloudy, with a low around 37.
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Saturday55°FMostly Sunny
Mostly sunny, with a high near 55.
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Saturday Night36°FPartly Cloudy
Partly cloudy, with a low around 36.
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Sunday59°FSunny1% chance of precipitation
Sunny, with a high near 59.
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Sunday Night37°FClear
Clear, with a low around 37.
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Monday66°FSunny
Sunny, with a high near 66.
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Monday Night42°FClear
Clear, with a low around 42.
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Tuesday69°FSunny1% chance of precipitation
Sunny, with a high near 69.
Issued by the National Weather Service (LSX office), updated .
Swansea Hourly Forecast
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Swansea Weather Radar
Open the full radar for SwanseaAbout Swansea
- Population (2020 Census)
- 14,386
- Coordinates
- 38.552, -89.987
- Elevation
- 551 ft
- NWS forecast office
- LSX
- Time zone
- America/Chicago
- Sunrise today
- 6:29 AM CST
- Sunset today
- 4:57 PM CST
- Daylight today
- 10 h 28 min
Swansea Weather Questions
What is the weather forecast for Swansea, Illinois?
Overnight: A slight chance of rain before 3am, then a slight chance of drizzle. Mostly cloudy, with a low around 55. Southwest wind around 8 mph. Chance of precipitation is 20%. Wednesday: A slight chance of drizzle before 7am. Mostly cloudy, with a high near 63. West wind 7 to 13 mph.
Will it rain or snow in Swansea this week?
Not much. The highest chance of precipitation in the 7-day forecast is 16%, Overnight.
How warm and how cold will it get in Swansea this week?
The warmest day is Tuesday, with a high near 69°F. The coldest night is Saturday Night, with a low near 36°F.
What time are sunrise and sunset in Swansea today?
Sunrise is at 6:29 AM CST and sunset is at 4:57 PM CST, for 10 h 28 min of daylight.
Weather near Swansea
- Belleville 3 mi
- Fairview Heights 3 mi
- Shiloh 4 mi
- O'Fallon 5 mi
- Caseyville 6 mi
- Alorton 7 mi
- Scott AFB 7 mi
- Centreville 7 mi