Chillicothe, IL Weather Forecast & Current Conditions

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Chillicothe, IL Weather Maps

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Chillicothe Weather Map
UTC Time: 9/16/2026, 09:47
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
Auto-refresh in: 5:02

Chillicothe, IL Regional Weather

Expires:202609161000;;538399
ASUS43 KLOT 160912
RWRIL 

ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
400 AM CDT WED SEP 16 2026

NOTE: "FAIR" INDICATES FEW OR NO CLOUDS BELOW 12,000 FEET WITH NO
SIGNIFICANT WEATHER AND/OR OBSTRUCTIONS TO VISIBILITY.

* THESE STATIONS ARE NOT UNDER NWS QUALITY CONTROL. THEY ALSO MAY NOT
  REPORT WEATHER SUCH AS PRECIPITATION OR FOG.


ILZ028>032-037-038-041>044-048-051>054-059>061-161000-
CENTRAL ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
PONTIAC        HVY RAIN  72  72 100 N9G17     30.22R TC  22           
BLOOMINGTON    TSTM      72  72 100 N9        30.23F TC  22           
DECATUR        CLOUDY    73  70  90 NE15      30.16  THUNDER TC  23   
PEORIA         RAIN      69  68  96 MISG      30.22R TC  21           
LACON*         RAIN      66  64  91 S3        30.24R TC  19           
LINCOLN*       CLOUDY    72  72 100 N5        30.19R TC  22           
SPRINGFIELD    LGT RAIN  72  71  97 NW12G18   30.22R TC  22           
TAYLORVILLE    NOT AVBL                                               
$$


SKY/WX - Weather  TMP - Temperature  DP - Dew Point  RH - Humidity
WIND - Wind Direction/Speed PRES - Barometric Pressure VSB - Visibility
WCI - Wind Chill Index E13G22 Wind - East Wind 13 mph/Gusts of 22 mph

Chillicothe, IL

Today
Thunderstorms
82°/ 68° 28°/ 20°
70%
Thursday
Thunderstorms
82°/ 65° 28°/ 18°
50%
Friday
Rain Showers
85°/ 68° 29°/ 20°
40%
Saturday
Rain Showers
88°/ 68° 31°/ 20°
70%
Sun-Sun Night
Thunderstorms
78°26°
50%
Monday
Rain Showers
75°/ 60° 24°/ 16°
50%
Tuesday
Sunny
75°24°
0%

Day: Mostly cloudy with a slight chance of thunderstorms. Showers likely, mainly this morning. Highs in the lower 80s. Northeast winds 5 to 10 mph. Chance of rain 70 percent.

Night: Mostly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Humid with lows in the upper 60s. East winds around 5 mph. Chance of rain 50 percent.

Marshall, IL

Today
Thunderstorms
78°/ 68° 26°/ 20°
70%
Thursday
Thunderstorms
82°/ 65° 28°/ 18°
70%
Friday
Rain Showers
82°/ 68° 28°/ 20°
50%
Saturday
Thunderstorms
85°/ 65° 29°/ 18°
70%
Sunday
Rain Showers
78°/ 62° 26°/ 17°
50%
Monday
Rain Showers
75°/ 58° 24°/ 14°
50%
Tuesday
Sunny
75°24°
0%

Day: A slight chance of thunderstorms. Showers likely, mainly this morning. Highs in the upper 70s. Northeast winds 5 to 10 mph. Chance of rain 60 percent.

Night: Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. Lows in the upper 60s. East winds around 5 mph. Chance of rain 70 percent.

Woodford, IL

Today
Thunderstorms
82°/ 68° 28°/ 20°
60%
Thursday
Thunderstorms
85°/ 65° 29°/ 18°
50%
Friday
Rain Showers
82°/ 68° 28°/ 20°
40%
Saturday
Rain Showers
88°/ 65° 31°/ 18°
70%
Sun-Sun Night
Thunderstorms
78°26°
50%
Monday
Rain Showers
75°/ 60° 24°/ 16°
50%
Tuesday
Rain Showers
75°24°
30%

Day: Mostly cloudy with a slight chance of thunderstorms. Showers likely, mainly this morning. Highs in the lower 80s. Northeast winds 5 to 10 mph. Chance of rain 60 percent.

Night: Mostly cloudy in the evening, then becoming partly cloudy. A chance of showers. A slight chance of thunderstorms in the evening, then a chance of thunderstorms after midnight. Humid with lows in the upper 60s. East winds around 5 mph. Chance of rain 50 percent.

Stark, IL

Today
Thunderstorms
78°/ 65° 26°/ 18°
60%
Thursday
Thunderstorms
82°/ 65° 28°/ 18°
70%
Friday
Rain Showers
82°/ 68° 28°/ 20°
50%
Saturday
Rain Showers
85°/ 65° 29°/ 18°
70%
Sunday
Rain Showers
78°/ 62° 26°/ 17°
50%
Monday
Rain Showers
75°/ 58° 24°/ 14°
50%
Tuesday
Rain Showers
75°24°
40%

Day: Mostly cloudy with a slight chance of thunderstorms. Showers likely, mainly this morning. Highs in the upper 70s. Northeast winds 5 to 10 mph. Chance of rain 60 percent.

Night: Mostly cloudy. Showers likely with a chance of thunderstorms after midnight. Lows in the mid 60s. East winds around 5 mph in the evening, becoming light and variable. Chance of rain 60 percent.

Tazewell, IL

Today
Thunderstorms
85°/ 68° 29°/ 20°
70%
Thursday
Thunderstorms
85°/ 68° 29°/ 20°
50%
Friday
Rain Showers
85°/ 68° 29°/ 20°
40%
Saturday
Rain Showers
88°/ 68° 31°/ 20°
70%
Sun-Sun Night
Thunderstorms
80°27°
50%
Monday
Rain Showers
78°/ 60° 26°/ 16°
50%

Day: Mostly cloudy with a slight chance of thunderstorms. Showers likely, mainly this morning. Highs in the mid 80s. Northeast winds 5 to 10 mph. Chance of rain 70 percent.

Night: Partly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Humid with lows in the upper 60s. East winds around 5 mph. Chance of rain 50 percent.

Putnam, IL

Today
Thunderstorms
78°/ 68° 26°/ 20°
70%
Thursday
Thunderstorms
82°/ 65° 28°/ 18°
70%
Friday
Rain Showers
82°/ 68° 28°/ 20°
50%
Sat-Sat Night
Thunderstorms
85°29°
70%
Sunday
Rain Showers
78°/ 62° 26°/ 17°
60%
Monday
Rain Showers
75°/ 58° 24°/ 14°
50%
Tuesday
Rain Showers
75°24°
40%

Day: A slight chance of thunderstorms. Showers likely after midnight, then a chance of showers. Humid with highs in the upper 70s. Northeast winds around 5 mph. Chance of rain 70 percent.

Night: Mostly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Humid with lows in the upper 60s. East winds around 5 mph. Chance of rain 50 percent.

Bureau, IL

Today
Thunderstorms
75°/ 65° 24°/ 18°
70%
Thursday
Thunderstorms
82°/ 65° 28°/ 18°
50%
Friday
Rain Showers
80°/ 68° 27°/ 20°
60%
Sat-Sat Night
Thunderstorms
85°29°
70%
Sunday
Rain Showers
75°/ 62° 24°/ 17°
50%
Monday
Rain Showers
75°/ 58° 24°/ 14°
50%
Tuesday
Rain Showers
75°24°
40%

Day: Cloudy with a slight chance of thunderstorms. Showers likely after midnight, then a chance of showers. Not as warm. Humid with highs in the mid 70s. Northeast winds 5 to 10 mph. Chance of rain 70 percent.

Night: Mostly cloudy. A chance of showers and thunderstorms after midnight. Humid with lows in the mid 60s. East winds around 5 mph. Chance of rain 50 percent.

La Salle, IL

Tonight
Thunderstorms
68°20°
80%
Wednesday
Thunderstorms
75°/ 68° 24°/ 20°
80%
Thursday
Thunderstorms
80°/ 65° 27°/ 18°
70%
Friday
Rain Showers
80°/ 68° 27°/ 20°
50%
Saturday
Thunderstorms
85°/ 65° 29°/ 18°
70%
Sunday
Rain Showers
78°/ 62° 26°/ 17°
60%
Monday
Rain Showers
75°/ 58° 24°/ 14°
40%
Tuesday
Rain Showers
75°24°
30%

Night: Showers and a slight chance of thunderstorms. Near steady temperature in the upper 60s. Northeast winds 5 to 10 mph. Chance of precipitation 80 percent.

Knox, IL

Today
Thunderstorms
78°/ 68° 26°/ 20°
70%
Thursday
Thunderstorms
82°/ 65° 28°/ 18°
50%
Friday
Rain Showers
82°/ 68° 28°/ 20°
40%
Saturday
Rain Showers
85°/ 65° 29°/ 18°
70%
Sunday
Rain Showers
78°/ 62° 26°/ 17°
70%
Monday
Rain Showers
75°/ 58° 24°/ 14°
50%

Day: Mostly cloudy. Showers likely with a chance of thunderstorms this morning, then a chance of showers with a slight chance of thunderstorms this afternoon. Highs in the upper 70s. East winds 5 to 10 mph. Chance of rain 70 percent.

Night: Mostly cloudy. A chance of showers and thunderstorms after midnight. Lows in the upper 60s. East winds around 5 mph in the evening, becoming light and variable. Chance of rain 50 percent.

McLean, IL

Today
Thunderstorms
85°/ 68° 29°/ 20°
60%
Thursday
Thunderstorms
85°/ 65° 29°/ 18°
50%
Friday
Rain Showers
85°/ 68° 29°/ 20°
40%
Saturday
Rain Showers
88°/ 68° 31°/ 20°
70%
Sunday
Rain Showers
80°/ 62° 27°/ 17°
50%
Monday
Rain Showers
78°/ 60° 26°/ 16°
50%
Tuesday
Rain Showers
75°24°
30%

Day: Mostly cloudy with a slight chance of thunderstorms. Showers likely, mainly this morning. Not as warm with highs in the mid 80s. East winds 5 to 10 mph. Chance of rain 60 percent.

Night: Mostly cloudy in the evening, then becoming partly cloudy. A chance of showers. A chance of thunderstorms, mainly in the evening. Humid with lows in the upper 60s. Northeast winds around 5 mph, becoming southeast after midnight. Chance of rain 50 percent.

Henry, IL

Today
Thunderstorms
75°/ 65° 24°/ 18°
70%
Thursday
Thunderstorms
80°/ 65° 27°/ 18°
70%
Friday
Rain Showers
82°/ 68° 28°/ 20°
50%
Saturday
Rain Showers
85°/ 65° 29°/ 18°
70%
Sunday
Rain Showers
75°/ 62° 24°/ 17°
60%
Monday
Rain Showers
72°/ 58° 22°/ 14°
50%

Day: A slight chance of thunderstorms. Showers likely after midnight, then a chance of showers. Humid with highs in the mid 70s. Northeast winds 5 to 10 mph. Chance of rain 70 percent.

Night: Mostly cloudy. Showers likely with a chance of thunderstorms after midnight. Humid with lows in the mid 60s. East winds around 5 mph. Chance of rain 70 percent.

Livingston, IL

Tonight
Thunderstorms
70°21°
80%
Wednesday
Thunderstorms
82°/ 68° 28°/ 20°
70%
Thursday
Thunderstorms
82°/ 65° 28°/ 18°
70%
Friday
Rain Showers
82°/ 68° 28°/ 20°
50%
Saturday
Thunderstorms
88°/ 65° 31°/ 18°
70%
Sunday
Thunderstorms
78°/ 62° 26°/ 17°
50%
Monday
Rain Showers
78°/ 58° 26°/ 14°
40%
Tuesday
Rain Showers
75°24°
30%

Night: Showers and a chance of thunderstorms. Near steady temperature around 70. Northeast winds around 5 mph. Chance of precipitation 80 percent.

Fulton, IL

Today
Thunderstorms
82°/ 68° 28°/ 20°
70%
Thursday
Thunderstorms
85°/ 68° 29°/ 20°
50%
Friday
Rain Showers
85°/ 68° 29°/ 20°
40%
Saturday
Rain Showers
88°/ 65° 31°/ 18°
70%
Sunday
Rain Showers
78°/ 62° 26°/ 17°
50%
Monday
Rain Showers
75°/ 58° 24°/ 14°
50%
Tuesday
Rain Showers
75°24°
30%

Day: Mostly cloudy. Showers likely with a chance of thunderstorms this morning, then a chance of showers with a slight chance of thunderstorms this afternoon. Not as warm with highs in the lower 80s. Northeast winds around 5 mph. Chance of rain 70 percent.

Night: Partly cloudy. A chance of showers with a slight chance of thunderstorms after midnight. Humid with lows in the upper 60s. Northeast winds around 5 mph in the evening, becoming light and variable. Chance of rain 50 percent.

Mason, IL

Today
Thunderstorms
85°/ 68° 29°/ 20°
70%
Thursday
Thunderstorms
88°/ 68° 31°/ 20°
40%
Friday
Rain Showers
88°/ 68° 31°/ 20°
40%
Saturday
Partly Cloudy
90°/ 68° 32°/ 20°
70%
Sun-Sun Night
Thunderstorms
82°28°
50%
Monday
Rain Showers
78°/ 60° 26°/ 16°
50%

Day: Mostly cloudy. Showers likely with a chance of thunderstorms this morning, then a chance of showers with a slight chance of thunderstorms this afternoon. Highs in the mid 80s. Northeast winds around 5 mph. Chance of rain 70 percent.

Night: Partly cloudy. A slight chance of showers and thunderstorms after midnight. Humid with lows in the upper 60s. Northeast winds around 5 mph, becoming southeast after midnight. Chance of rain 20 percent.

Logan, IL

Today
Thunderstorms
88°/ 70° 31°/ 21°
60%
Thursday
Thunderstorms
88°/ 68° 31°/ 20°
40%
Friday
Rain Showers
88°/ 68° 31°/ 20°
40%
Saturday
Partly Cloudy
92°/ 68° 33°/ 20°
70%
Sunday
Thunderstorms
82°/ 65° 28°/ 18°
50%
Monday
Rain Showers
78°/ 62° 26°/ 17°
40%

Day: Mostly cloudy with showers likely with a slight chance of thunderstorms this morning, then partly sunny this afternoon. Highs in the upper 80s. East winds 5 to 10 mph. Chance of rain 60 percent.

Night: Partly cloudy. A slight chance of showers and thunderstorms after midnight. Humid with lows around 70. East winds around 5 mph, becoming southeast after midnight. Chance of rain 20 percent.

Whiteside, IL

Today
Thunderstorms
75°/ 65° 24°/ 18°
90%
Thursday
Thunderstorms
78°/ 62° 26°/ 17°
70%
Friday
Rain Showers
78°/ 65° 26°/ 18°
70%
Sat-Sat Night
Thunderstorms
82°28°
70%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
50%
Monday
Rain Showers
72°/ 58° 22°/ 14°
50%

Day: Cloudy with a chance of showers with a slight chance of thunderstorms. Highs in the mid 70s. Northeast winds 5 to 10 mph. Chance of rain 50 percent.

Night: Mostly cloudy. Showers with a chance of thunderstorms after midnight. Humid with lows in the mid 60s. East winds around 5 mph. Chance of rain 90 percent.

Lee, IL

Tonight
Thunderstorms
62°17°
50%
Wednesday
Rain Showers
72°/ 65° 22°/ 18°
80%
Thursday
Thunderstorms
78°/ 62° 26°/ 17°
50%
Friday
Thunderstorms
78°/ 65° 26°/ 18°
70%
Saturday
Thunderstorms
82°/ 62° 28°/ 17°
70%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
50%
Monday
Rain Showers
72°/ 58° 22°/ 14°
40%
Tuesday
Rain Showers
75°24°
30%

Night: Cloudy. A chance of showers. A slight chance of thunderstorms late. Lows in the lower 60s. Northeast winds 5 to 10 mph. Chance of precipitation 50 percent.

De Witt, IL

Today
Thunderstorms
88°/ 70° 31°/ 21°
60%
Thursday
Thunderstorms
88°/ 68° 31°/ 20°
40%
Friday
Rain Showers
85°/ 68° 29°/ 20°
30%
Saturday
Partly Cloudy
90°/ 68° 32°/ 20°
70%
Sunday
Rain Showers
82°28°
50%
Sun Night-Mon
Rain Showers
65°18°
40%
Mon Night-Tue
Cloudy
60°16°
0%

Day: Mostly cloudy with showers likely with a slight chance of thunderstorms this morning, then partly sunny this afternoon. Highs in the upper 80s. Southeast winds 5 to 10 mph. Chance of rain 60 percent.

Night: Partly cloudy with a slight chance of showers and thunderstorms. Humid with lows around 70. East winds around 5 mph, becoming southeast after midnight. Chance of rain 20 percent.

Grundy, IL

Tonight
Thunderstorms
70°21°
80%
Wednesday
Thunderstorms
78°/ 68° 26°/ 20°
80%
Thursday
Thunderstorms
82°/ 65° 28°/ 18°
70%
Friday
Rain Showers
82°/ 68° 28°/ 20°
50%
Saturday
Thunderstorms
85°/ 65° 29°/ 18°
70%
Sunday
Rain Showers
78°/ 62° 26°/ 17°
50%
Monday
Rain Showers
78°/ 60° 26°/ 16°
40%
Tuesday
Rain Showers
75°24°
30%

Night: Showers and a chance of thunderstorms. Near steady temperature around 70. Northeast winds around 5 mph. Chance of precipitation 80 percent.

Mercer, IL

Today
Thunderstorms
75°/ 65° 24°/ 18°
70%
Thursday
Thunderstorms
80°/ 65° 27°/ 18°
50%
Friday
Rain Showers
82°/ 68° 28°/ 20°
50%
Saturday
Rain Showers
85°/ 65° 29°/ 18°
60%
Sunday
Rain Showers
75°/ 62° 24°/ 17°
60%
Monday
Rain Showers
72°/ 58° 22°/ 14°
50%

Day: A slight chance of thunderstorms. Showers likely after midnight, then a chance of showers this afternoon. Humid with highs in the mid 70s. Northeast winds 5 to 10 mph. Chance of rain 70 percent.

Night: Mostly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Humid with lows in the mid 60s. East winds around 5 mph. Chance of rain 50 percent.

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