Clarksville, IL Weather Forecast

Local 7-day forecast

84°

Showers And Thunderstorms Likely

Track current conditions, temperature changes, wind, and the full daily outlook for Clarksville, IL in one place.

Wednesday, September 16, 2026

Wind: 7 mph ENE

Wednesday

Showers and thunderstorms likely before 11am, then a slight chance of showers and thunderstorms between 11am and noon, then a chance of showers and thunderstorms between noon and 1pm, then a slight chance of showers and thunderstorms between 1pm and 2pm, then a chance of showers and thunderstorms between 2pm and 4pm. Partly sunny, with a high near 84. East northeast wind around 7 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.

Local 7-day forecast

Local Weather Overview

This forecast page for Clarksville, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Sep 15, 2026 1:32 PM CDT.

The active forecast window currently covers Sep 16 to Sep 21, 2026 for Clarksville, IL.

Page Snapshot

Page focus: city weather
Forecast window: Sep 16 to Sep 21, 2026
Latest sync: Sep 15, 2026 1:32 PM CDT
Forecast office: ILX
Source: NOAA / NWS

Next High

84°F

Wednesday

Next Low

69°F

Wednesday Night

Rain Outlook

Periods mentioning precipitation

Windiest

9 to 15 mph

Monday

Daily Outlook

Today

Sep 16

Showers And Thunderstorms Likely

84 °F

/ 69°F

Wind 7 mph

Thu

Sep 17

Chance Showers And Thunderstorms

87 °F

/ 65°F

Wind 7 mph

Fri

Sep 18

Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms

84 °F

/ 67°F

Wind 8 mph

Sat

Sep 19

Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms

87 °F

/ 65°F

Wind 14 mph

Sun

Sep 20

Showers And Thunderstorms Likely

77 °F

/ 56°F

Wind 8 to 13 mph

Mon

Sep 21

Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms

73 °F

/ 53°F

Wind 9 to 15 mph

This Week in Clarksville

Thursday looks like the warmest upcoming period in Clarksville at 87 degrees F.

Monday Night is the coolest period ahead with temperatures near 53 degrees F.

The strongest winds are forecast for Monday at about 9 to 15 mph NE.

Precipitation is mentioned in 12 upcoming forecast periods.

Forecast Details

Last updated: Sep 15, 2026 1:32 PM CDT
Coverage: 6 days
Time zone: America/Chicago
Forecast office: ILX
Radar station: KILX

Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.

Open NOAA source

Extended Forecast

Wednesday Night

Sep 16

69°F

Chance Showers And Thunderstorms

6 mph ESE

A chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 69. East southeast wind around 6 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.

Thursday

Sep 17

87°F

Chance Showers And Thunderstorms

7 mph W

A chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms between 7am and 1pm. Partly sunny, with a high near 87. West wind around 7 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.

Thursday Night

Sep 17

65°F

Mostly Cloudy then Slight Chance Showers And Thunderstorms

7 mph NNE

A slight chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 65. North northeast wind around 7 mph.

Friday

Sep 18

84°F

Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms

8 mph E

A slight chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 84. East wind around 8 mph. Chance of precipitation is 30%.

Friday Night

Sep 18

67°F

Slight Chance Showers And Thunderstorms

10 mph SE

A slight chance of showers and thunderstorms. Partly cloudy, with a low around 67.

Saturday

Sep 19

87°F

Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms

14 mph SW

A slight chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 87.

Saturday Night

Sep 19

65°F

Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely

7 to 10 mph WNW

A slight chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 65.

Sunday

Sep 20

77°F

Showers And Thunderstorms Likely

8 to 13 mph N

Showers and thunderstorms likely. Partly sunny, with a high near 77.

Sunday Night

Sep 20

56°F

Chance Showers And Thunderstorms

8 to 13 mph NNE

A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 56.

Monday

Sep 21

73°F

Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms

9 to 15 mph NE

A slight chance of rain showers between 7am and 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 73.

Monday Night

Sep 21

53°F

Slight Chance Showers And Thunderstorms then Partly Cloudy

6 to 15 mph NE

A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 53.

Detailed Forecast

Period	Conditions	Temp	Wind	Details
Wednesday Sep 16	Showers And Thunderstorms Likely	84°F	7 mph ENE	Showers and thunderstorms likely before 11am, then a slight chance of showers and thunderstorms between 11am and noon, t...
Wednesday Night Sep 16	Chance Showers And Thunderstorms	69°F	6 mph ESE	A chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Partly cloudy, wi...
Thursday Sep 17	Chance Showers And Thunderstorms	87°F	7 mph W	A chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms between 7am and 1pm. Partly...
Thursday Night Sep 17	Mostly Cloudy then Slight Chance Showers And Thunderstorms	65°F	7 mph NNE	A slight chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 65. North northeast wind around...
Friday Sep 18	Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms	84°F	8 mph E	A slight chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms between 7am and 1pm,...
Friday Night Sep 18	Slight Chance Showers And Thunderstorms	67°F	10 mph SE	A slight chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Saturday Sep 19	Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms	87°F	14 mph SW	A slight chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high...
Saturday Night Sep 19	Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely	65°F	7 to 10 mph WNW	A slight chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a lo...
Sunday Sep 20	Showers And Thunderstorms Likely	77°F	8 to 13 mph N	Showers and thunderstorms likely. Partly sunny, with a high near 77.
Sunday Night Sep 20	Chance Showers And Thunderstorms	56°F	8 to 13 mph NNE	A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 56.
Monday Sep 21	Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms	73°F	9 to 15 mph NE	A slight chance of rain showers between 7am and 1pm, then a slight chance of showers and thunderstorms. Partly sunny, wi...
Monday Night Sep 21	Slight Chance Showers And Thunderstorms then Partly Cloudy	53°F	6 to 15 mph NE	A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 53.

Nearby Forecasts

Explore weather pages for nearby cities and major places around Clarksville.

Region Links

McLean County weather

County forecast page

Illinois weather

Statewide weather overview

United States weather

National weather entry point

Weather data provided by the National Weather Service (NOAA). Forecast pages update automatically as new periods are synced for each supported U.S. location.