Troy, IL Weather Forecast & Current Conditions

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Troy, IL Weather Maps

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Troy Weather Map
UTC Time: 9/16/2026, 22:39
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
Auto-refresh in: 5:02

Troy, IL Regional Weather

Expires:202609162300;;568347
ASUS43 KLOT 162210
RWRIL 

ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
500 PM 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.


ILZ079-100>102-162300-
SOUTHWEST ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
ALTON          SUNNY     91  72  52 CALM      30.20S HX  98  TC  33   
CAHOKIA*       TSTM      76  73  91 SE9G22    30.22R FOG     TC  24   
SPARTA*        MOSUNNY   93  67  42 S10       30.21R HX  97  TC  34   
$$


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

Troy, IL

Tonight
Thunderstorms
75°24°
40%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
40%
Sun Night
Thunderstorms
68°20°
20%
Monday
Thunderstorms
88°/ 65° 31°/ 18°
40%
Tuesday
Rain Showers
82°28°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Mostly cloudy with scattered thunderstorms with a slight chance of showers this evening, then mostly clear after midnight. Lows in the mid 70s. South winds around 5 mph. Chance of rain 40 percent.

Saint Clair, IL

Tonight
Thunderstorms
75°24°
40%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
40%
Sun Night
Thunderstorms
68°20°
20%
Monday
Thunderstorms
88°/ 65° 31°/ 18°
40%
Tuesday
Rain Showers
82°28°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Mostly cloudy with scattered thunderstorms with a slight chance of showers this evening, then mostly clear after midnight. Lows in the mid 70s. South winds around 5 mph. Chance of rain 40 percent.

Clinton, IL

Tonight
Thunderstorms
75°24°
30%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
20%
Sun Night
Rain Showers
68°20°
20%
Monday
Thunderstorms
88°/ 65° 31°/ 18°
30%
Tuesday
Rain Showers
85°/ 62° 29°/ 17°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Partly cloudy. Scattered showers and thunderstorms this evening. Lows in the mid 70s. South winds around 5 mph. Chance of rain 30 percent.

Saint Louis, MO

Tonight
Thunderstorms
75°24°
40%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
40%
Sun Night
Thunderstorms
68°20°
20%
Monday
Thunderstorms
88°/ 65° 31°/ 18°
40%
Tuesday
Rain Showers
82°28°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Mostly cloudy with scattered thunderstorms with a slight chance of showers this evening, then mostly clear after midnight. Lows in the mid 70s. South winds around 5 mph. Chance of rain 40 percent.

Saint Louis City, MO

Tonight
Thunderstorms
75°24°
40%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
40%
Sun Night
Thunderstorms
68°20°
20%
Monday
Thunderstorms
88°/ 65° 31°/ 18°
40%
Tuesday
Rain Showers
82°28°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Mostly cloudy with scattered thunderstorms with a slight chance of showers this evening, then mostly clear after midnight. Lows in the mid 70s. South winds around 5 mph. Chance of rain 40 percent.

Bond, IL

Tonight
Thunderstorms
72°22°
30%
Thursday
Sunny
95°/ 72° 35°/ 22°
0%
Friday
Sunny
92°/ 72° 33°/ 22°
0%
Saturday
Sunny
95°/ 72° 35°/ 22°
30%
Sun Night
Rain Showers
65°18°
20%
Monday
Thunderstorms
88°/ 62° 31°/ 17°
30%
Tuesday
Rain Showers
82°/ 62° 28°/ 17°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Mostly cloudy with scattered showers and thunderstorms this evening, then partly cloudy after midnight. Lows in the lower 70s. South winds around 5 mph this evening, becoming light and variable. Chance of rain 30 percent.

Saint Charles, MO

Tonight
Thunderstorms
75°24°
40%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
40%
Sun Night
Thunderstorms
68°20°
20%
Monday
Thunderstorms
88°/ 65° 31°/ 18°
40%
Tuesday
Rain Showers
82°28°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Mostly cloudy with scattered thunderstorms with a slight chance of showers this evening, then mostly clear after midnight. Lows in the mid 70s. South winds around 5 mph. Chance of rain 40 percent.

Greene, IL

Tonight
Cloudy
72°22°
0%
Thursday
Sunny
95°/ 70° 35°/ 21°
0%
Friday
Rain Showers
92°/ 72° 33°/ 22°
20%
Saturday
Sunny
95°/ 70° 35°/ 21°
50%
Sunday
Thunderstorms
88°31°
50%
Sun Night-Mon
Thunderstorms
65°18°
40%
Mon Night
Rain Showers
62°17°
40%
Tuesday
Rain Showers
82°28°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Partly cloudy this evening, then clearing. Lows in the lower 70s. Southeast winds around 5 mph.

Monroe, IL

Tonight
Thunderstorms
72°22°
50%
Thursday
Thunderstorms
98°/ 72° 37°/ 22°
20%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
20%
Sunday
Rain Showers
92°/ 68° 33°/ 20°
20%
Mon-Mon Night
Thunderstorms
88°31°
40%
Tuesday
Rain Showers
82°/ 62° 28°/ 17°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Mostly cloudy with scattered showers and thunderstorms this evening, then partly cloudy after midnight. Lows in the lower 70s. South winds around 5 mph. Chance of rain 50 percent.

Washington, IL

Tonight
Thunderstorms
75°24°
30%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
20%
Sun Night
Rain Showers
68°20°
20%
Monday
Thunderstorms
88°/ 65° 31°/ 18°
30%
Tuesday
Rain Showers
85°/ 62° 29°/ 17°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Partly cloudy. Scattered showers and thunderstorms this evening. Lows in the mid 70s. South winds around 5 mph. Chance of rain 30 percent.

Montgomery, IL

Tonight
Thunderstorms
72°22°
20%
Thursday
Sunny
95°/ 70° 35°/ 21°
20%
Friday
Rain Showers
92°/ 70° 33°/ 21°
20%
Saturday
Sunny
95°/ 70° 35°/ 21°
50%
Sun Night
Rain Showers
65°18°
20%
Monday
Thunderstorms
85°/ 62° 29°/ 17°
30%
Tuesday
Rain Showers
82°/ 60° 28°/ 16°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Partly cloudy. A slight chance of showers and thunderstorms this evening. Lows in the lower 70s. East winds around 5 mph, becoming south after midnight. Chance of rain 20 percent.

Monroe, MO

Tonight
Thunderstorms
72°22°
50%
Thursday
Thunderstorms
98°/ 72° 37°/ 22°
20%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
20%
Sunday
Rain Showers
92°/ 68° 33°/ 20°
20%
Mon-Mon Night
Thunderstorms
88°31°
40%
Tuesday
Rain Showers
82°/ 62° 28°/ 17°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Mostly cloudy with scattered showers and thunderstorms this evening, then partly cloudy after midnight. Lows in the lower 70s. South winds around 5 mph. Chance of rain 50 percent.

Randolph, IL

Tonight
Thunderstorms
72°22°
50%
Thursday
Thunderstorms
98°/ 72° 37°/ 22°
20%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
0%
Sunday
Rain Showers
95°/ 68° 35°/ 20°
20%
Monday
Thunderstorms
88°/ 65° 31°/ 18°
30%
Tuesday
Rain Showers
82°/ 62° 28°/ 17°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Partly cloudy. Scattered showers and thunderstorms this evening. Lows in the lower 70s. South winds around 5 mph. Chance of rain 50 percent.

Fayette, IL

Tonight
Thunderstorms
72°22°
20%
Thursday
Sunny
95°/ 70° 35°/ 21°
20%
Friday
Rain Showers
92°/ 70° 33°/ 21°
20%
Saturday
Sunny
95°/ 70° 35°/ 21°
50%
Sun Night
Rain Showers
65°18°
20%
Monday
Thunderstorms
85°/ 62° 29°/ 17°
30%
Tuesday
Rain Showers
82°/ 60° 28°/ 16°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Partly cloudy. A slight chance of showers and thunderstorms this evening. Lows in the lower 70s. East winds around 5 mph, becoming south after midnight. Chance of rain 20 percent.

Marion, IL

Tonight
Thunderstorms
75°24°
30%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
20%
Sun Night
Rain Showers
68°20°
20%
Monday
Thunderstorms
88°/ 65° 31°/ 18°
30%
Tuesday
Rain Showers
85°/ 62° 29°/ 17°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Partly cloudy. Scattered showers and thunderstorms this evening. Lows in the mid 70s. South winds around 5 mph. Chance of rain 30 percent.

Pinckneyville, IL

Afternoon
Thunderstorms
95°/ 72° 35°/ 22°
50%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Sat Night
Cloudy
70°21°
0%
Sun Night
Cloudy
70°21°
0%
Monday
Partly Cloudy
92°/ 65° 33°/ 18°
30%
Tuesday
Sunny
85°29°
0%

Day: Sunny with a chance of showers with a slight chance of thunderstorms. Hot. Near steady temperature in the mid 90s. Southwest winds 5 to 10 mph. Chance of rain 50 percent. Highest heat index readings heat index readings up to 106.

Night: Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly clear after midnight. Lows in the lower 70s. South winds around 5 mph. Chance of rain 20 percent.

Montgomery, MO

Tonight
Cloudy
72°22°
0%
Thursday
Sunny
95°/ 72° 35°/ 22°
0%
Friday
Sunny
92°/ 72° 33°/ 22°
0%
Saturday
Sunny
92°/ 68° 33°/ 20°
50%
Sunday
Thunderstorms
88°31°
50%
Sun Night-Mon
Thunderstorms
65°18°
40%
Mon Night
Rain Showers
62°17°
40%
Tuesday
Rain Showers
78°26°
20%
Wednesday
Rain Showers
78°26°
20%

Night: Partly cloudy this evening, then clearing. Lows in the lower 70s. Southeast winds around 5 mph.

Mount Vernon, IL

Afternoon
Thunderstorms
95°/ 75° 35°/ 24°
30%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Sat Night
Cloudy
70°21°
0%
Sun Night
Cloudy
70°21°
0%
Monday
Partly Cloudy
92°/ 65° 33°/ 18°
30%
Tuesday
Sunny
85°29°
0%

Day: Sunny with a chance of showers with a slight chance of thunderstorms. Hot. Near steady temperature in the mid 90s. Southwest winds 5 to 10 mph. Chance of rain 30 percent. Highest heat index readings heat index readings up to 105.

Night: Partly cloudy with a chance of showers with a slight chance of thunderstorms in the evening, then mostly clear after midnight. Lows in the mid 70s. South winds around 5 mph. Chance of rain 30 percent.

Franklin, MO

Tonight
Thunderstorms
72°22°
50%
Thursday
Thunderstorms
95°/ 72° 35°/ 22°
20%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
95°/ 70° 35°/ 21°
40%
Sunday
Rain Showers
92°/ 65° 33°/ 18°
20%
Monday
Thunderstorms
85°/ 62° 29°/ 17°
40%
Tuesday
Rain Showers
82°28°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Partly cloudy with scattered showers and thunderstorms this evening, then mostly clear after midnight. Lows in the lower 70s. South winds around 5 mph. Chance of rain 50 percent.

Sainte Genevieve, MO

Tonight
Thunderstorms
72°22°
50%
Thursday
Thunderstorms
98°/ 72° 37°/ 22°
20%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
0%
Sunday
Rain Showers
95°/ 68° 35°/ 20°
20%
Monday
Thunderstorms
88°/ 65° 31°/ 18°
30%
Tuesday
Rain Showers
82°/ 62° 28°/ 17°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Partly cloudy. Scattered showers and thunderstorms this evening. Lows in the lower 70s. South winds around 5 mph. Chance of rain 50 percent.

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