Slap Out, IL Weather Forecast & Current Conditions

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Slap Out Weather Map
UTC Time: 9/21/2026, 10:18
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
Auto-refresh in: 5:02

Slap Out, IL Regional Weather

Expires:202609211100;;812778
ASUS43 KLOT 211010
RWRIL 

ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
500 AM CDT MON SEP 21 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.


ILZ064>066-069>071-074>076-080>082-084>086-088>090-092>094-211100-
SOUTH-CENTRAL ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
CARBONDALE     NOT AVBL                                               
CAIRO*         PTCLDY    73  70  90 N3        29.92R TC  23           
EFFINGHAM*     CLOUDY    69  67  94 CALM      29.96R TC  20           
MARION         MOCLDY    73  66  78 NE6       29.93R TC  23           
MT. VERNON     CLOUDY    69  67  93 CALM      29.93S TC  21           
CENTRALIA*     CLOUDY    69  68  98 E3        29.93F TC  21           
SALEM*         LGT RAIN  70  70  99 MISG      29.93F TC  21           
METROPOLIS*    PTCLDY    74  67  78 N6        29.91S TC  23           
$$


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

Slap Out, IL

Today
Thunderstorms
78°/ 60° 26°/ 16°
40%
Tuesday
Partly Cloudy
75°/ 55° 24°/ 13°
0%
Wednesday
Sunny
75°/ 55° 24°/ 13°
0%
Thursday
Cloudy
55°13°
0%
Fri Night
Cloudy
55°13°
0%
Saturday
Partly Cloudy
75°/ 55° 24°/ 13°
0%

Day: Mostly cloudy. A chance of showers and thunderstorms this morning. Much cooler with highs in the upper 70s. Northeast winds 5 to 10 mph. Chance of rain 40 percent.

Night: Mostly cloudy. Lows around 60. Northeast winds 5 to 10 mph.

Flora, IL

Tonight
Thunderstorms
68°20°
70%
Monday
Thunderstorms
78°/ 58° 26°/ 14°
50%
Tuesday
Partly Cloudy
75°/ 55° 24°/ 13°
0%
Wednesday
Cloudy
75°24°
0%
Thursday
Cloudy
75°24°
0%
Friday
Cloudy
75°24°
0%
Sat Night
Cloudy
75°24°
0%
Sunday
Sunny
80°27°
0%

Night: Showers and thunderstorms likely. Near steady temperature in the upper 60s. Northeast winds 5 to 10 mph. Chance of rain 70 percent.

Fairfield, IL

Overnight
Thunderstorms
68°20°
50%
Monday
Thunderstorms
80°/ 60° 27°/ 16°
40%
Tuesday
Partly Cloudy
75°/ 55° 24°/ 13°
0%
Wednesday
Cloudy
78°26°
0%
Thursday
Cloudy
78°/ 55° 26°/ 13°
0%
Friday
Cloudy
78°26°
0%
Sat Night
Cloudy
78°26°
0%
Sunday
Sunny
82°28°
0%

Night: Mostly cloudy with a chance of showers and thunderstorms. Near steady temperature in the upper 60s. North winds 5 to 10 mph. Chance of rain 50 percent.

Mount Vernon, IL

Overnight
Thunderstorms
70°21°
50%
Monday
Thunderstorms
82°/ 60° 28°/ 16°
20%
Tuesday
Sunny
78°/ 55° 26°/ 13°
0%
Wednesday
Cloudy
78°26°
0%
Thursday
Cloudy
78°/ 55° 26°/ 13°
0%
Fri-Fri Night
Cloudy
78°26°
0%
Saturday
Partly Cloudy
75°/ 55° 24°/ 13°
0%

Night: Mostly cloudy with a chance of showers and thunderstorms. Near steady temperature around 70. Northeast winds around 5 mph. Chance of rain 50 percent.

Litchfield, IL

Today
Thunderstorms
72°/ 58° 22°/ 14°
50%
Tuesday
Partly Cloudy
72°/ 52° 22°/ 11°
0%
Wednesday
Sunny
72°/ 52° 22°/ 11°
0%
Thursday
Cloudy
52°11°
0%
Fri Night
Cloudy
52°11°
0%
Saturday
Partly Cloudy
75°/ 52° 24°/ 11°
0%

Day: Cloudy. A chance of showers and thunderstorms this morning. Patchy fog this morning. Much cooler with highs in the lower 70s. Northeast winds 5 to 10 mph. Chance of rain 50 percent.

Night: Mostly cloudy. Lows in the upper 50s. Northeast winds 5 to 10 mph.

Centralia, IL

Today
Thunderstorms
78°/ 60° 26°/ 16°
40%
Tuesday
Partly Cloudy
75°/ 55° 24°/ 13°
0%
Wednesday
Sunny
75°/ 55° 24°/ 13°
0%
Thursday
Cloudy
55°13°
0%
Fri Night
Cloudy
55°13°
0%
Saturday
Partly Cloudy
75°/ 55° 24°/ 13°
0%

Day: Mostly cloudy. A chance of showers and thunderstorms this morning. Much cooler with highs in the upper 70s. Northeast winds 5 to 10 mph. Chance of rain 40 percent.

Night: Mostly cloudy. Lows around 60. Northeast winds 5 to 10 mph.

Effingham, IL

Tonight
Thunderstorms
68°20°
70%
Monday
Thunderstorms
75°/ 58° 24°/ 14°
50%
Tuesday
Partly Cloudy
72°/ 55° 22°/ 13°
0%
Wednesday
Cloudy
75°24°
0%
Thursday
Cloudy
75°24°
0%
Friday
Cloudy
75°24°
0%
Sat Night
Cloudy
75°24°
0%
Sunday
Sunny
80°27°
0%

Night: Showers and thunderstorms likely. Near steady temperature in the upper 60s. Northeast winds 5 to 10 mph. Chance of rain 70 percent.

McLeansboro, IL

Overnight
Thunderstorms
70°21°
20%
Monday
Thunderstorms
82°/ 62° 28°/ 17°
20%
Tuesday
Partly Cloudy
78°/ 58° 26°/ 14°
0%
Wednesday
Cloudy
78°26°
0%
Thursday
Cloudy
78°/ 55° 26°/ 13°
0%
Friday
Cloudy
78°26°
0%
Sat Night
Cloudy
78°26°
0%
Sunday
Sunny
82°28°
0%

Night: Mostly cloudy with a slight chance of showers and thunderstorms. Near steady temperature around 70. North winds around 5 mph. Chance of rain 20 percent.

Olney, IL

Tonight
Thunderstorms
68°20°
50%
Monday
Thunderstorms
78°/ 58° 26°/ 14°
50%
Tuesday
Partly Cloudy
75°/ 55° 24°/ 13°
0%
Wednesday
Cloudy
75°24°
0%
Thursday
Cloudy
75°24°
0%
Friday
Cloudy
75°24°
0%
Sat Night
Cloudy
75°24°
0%
Sunday
Sunny
82°28°
0%

Night: Cloudy with a chance of showers and thunderstorms. Near steady temperature in the upper 60s. Northeast winds around 10 mph. Chance of rain 50 percent.

West Frankfort, IL

Overnight
Thunderstorms
72°22°
20%
Monday
Thunderstorms
82°/ 62° 28°/ 17°
20%
Tuesday
Partly Cloudy
78°/ 58° 26°/ 14°
0%
Wednesday
Cloudy
78°26°
0%
Thursday
Cloudy
78°/ 55° 26°/ 13°
0%
Friday
Cloudy
78°26°
0%
Sat Night
Cloudy
78°26°
0%
Sunday
Sunny
82°28°
0%

Night: Mostly cloudy with a slight chance of showers and thunderstorms. Near steady temperature in the lower 70s. Northeast winds around 5 mph. Chance of rain 20 percent.

Carmi, IL

Overnight
Thunderstorms
72°22°
20%
Monday
Thunderstorms
85°/ 62° 29°/ 17°
20%
Tuesday
Partly Cloudy
78°/ 58° 26°/ 14°
0%
Wednesday
Cloudy
78°26°
0%
Thursday
Cloudy
78°/ 55° 26°/ 13°
0%
Friday
Cloudy
80°27°
0%
Saturday
Cloudy
80°27°
0%
Sunday
Cloudy
80°27°
0%

Night: Mostly cloudy with a slight chance of showers and thunderstorms. Near steady temperature in the lower 70s. North winds around 5 mph. Chance of rain 20 percent.

Newton, IL

Tonight
Thunderstorms
68°20°
70%
Monday
Thunderstorms
75°/ 58° 24°/ 14°
50%
Tuesday
Partly Cloudy
72°/ 55° 22°/ 13°
0%
Wednesday
Cloudy
75°24°
0%
Thursday
Cloudy
75°24°
0%
Friday
Cloudy
75°24°
0%
Sat Night
Cloudy
75°24°
0%
Sunday
Sunny
80°27°
0%

Night: Showers and thunderstorms likely. Near steady temperature in the upper 60s. Northeast winds 5 to 10 mph. Chance of rain 70 percent.

Albion, IL

Overnight
Thunderstorms
70°21°
50%
Monday
Thunderstorms
82°/ 62° 28°/ 17°
40%
Tuesday
Mostly Cloudy
78°/ 58° 26°/ 14°
0%
Wednesday
Cloudy
78°26°
0%
Thursday
Cloudy
78°/ 55° 26°/ 13°
0%
Friday
Cloudy
78°26°
0%
Saturday
Cloudy
78°26°
0%
Sunday
Cloudy
78°26°
0%

Night: Mostly cloudy with a chance of showers and thunderstorms. Near steady temperature around 70. Northeast winds around 5 mph. Chance of rain 50 percent.

Pinckneyville, IL

Overnight
Thunderstorms
68°20°
50%
Monday
Thunderstorms
82°/ 62° 28°/ 17°
20%
Tuesday
Partly Cloudy
78°/ 55° 26°/ 13°
0%
Wednesday
Cloudy
78°26°
0%
Thursday
Cloudy
78°26°
0%
Friday
Cloudy
78°26°
0%
Sat Night
Cloudy
78°26°
0%
Sunday
Sunny
82°28°
0%

Night: Mostly cloudy with a chance of showers and thunderstorms. Lows in the upper 60s. North winds around 5 mph. Chance of rain 50 percent.

Shelbyville, IL

Tonight
Thunderstorms
65°18°
70%
Monday
Thunderstorms
72°/ 55° 22°/ 13°
50%
Tuesday
Partly Cloudy
72°/ 52° 22°/ 11°
0%
Wednesday
Cloudy
72°22°
0%
Thursday
Cloudy
72°22°
0%
Fri Night
Cloudy
72°22°
0%
Saturday
Partly Cloudy
75°/ 52° 24°/ 11°
0%

Night: Showers and thunderstorms likely. Near steady temperature in the mid 60s. Northeast winds 5 to 10 mph. Chance of rain 70 percent.

Greenup, IL

Tonight
Thunderstorms
65°18°
70%
Monday
Thunderstorms
72°/ 58° 22°/ 14°
50%
Tuesday
Partly Cloudy
72°/ 55° 22°/ 13°
0%
Wednesday
Cloudy
75°24°
0%
Thursday
Cloudy
75°24°
0%
Friday
Cloudy
75°24°
0%
Sat Night
Cloudy
75°24°
0%
Sunday
Sunny
78°26°
0%

Night: Showers and thunderstorms likely. Near steady temperature in the mid 60s. Northeast winds around 10 mph. Chance of rain 70 percent.

Alton, IL

Today
Thunderstorms
75°/ 62° 24°/ 17°
40%
Tuesday
Partly Cloudy
72°/ 55° 22°/ 13°
0%
Wednesday
Sunny
75°/ 55° 24°/ 13°
0%
Thursday
Cloudy
55°13°
0%
Fri Night
Cloudy
55°13°
0%
Saturday
Rain Showers
75°/ 58° 24°/ 14°
20%
Sunday
Sunny
82°28°
0%

Day: Patchy fog this morning. Cloudy with a slight chance of thunderstorms. A chance of showers, mainly this morning. Much cooler with highs in the mid 70s. Northeast winds 5 to 10 mph. Chance of rain 40 percent.

Night: Mostly cloudy. Lows in the lower 60s. Northeast winds 5 to 10 mph.

Mount Carmel, IL

Overnight
Thunderstorms
70°21°
50%
Monday
Thunderstorms
82°/ 62° 28°/ 17°
50%
Tuesday
Mostly Cloudy
78°/ 58° 26°/ 14°
0%
Wednesday
Cloudy
78°26°
0%
Thursday
Cloudy
78°26°
0%
Friday
Cloudy
78°/ 52° 26°/ 11°
0%
Saturday
Cloudy
78°26°
0%
Sunday
Cloudy
78°26°
0%

Night: Mostly cloudy with a chance of showers and thunderstorms. Near steady temperature around 70. Northeast winds around 5 mph. Chance of rain 50 percent.

Harrisburg, IL

Overnight
Thunderstorms
68°20°
20%
Monday
Thunderstorms
85°/ 62° 29°/ 17°
20%
Tuesday
Partly Cloudy
78°/ 58° 26°/ 14°
0%
Wednesday
Cloudy
78°26°
0%
Thursday
Cloudy
78°/ 55° 26°/ 13°
0%
Friday
Cloudy
78°26°
0%
Sat Night
Cloudy
78°26°
0%
Sunday
Sunny
82°28°
0%

Night: Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the upper 60s. North winds around 5 mph. Chance of rain 20 percent.

Lawrenceville, IL

Tonight
Thunderstorms
68°20°
50%
Monday
Thunderstorms
78°/ 60° 26°/ 16°
50%
Tuesday
Mostly Cloudy
75°/ 58° 24°/ 14°
0%
Wednesday
Cloudy
75°24°
0%
Thursday
Cloudy
75°24°
0%
Friday
Cloudy
75°24°
0%
Sat Night
Cloudy
75°24°
0%
Sunday
Sunny
82°28°
0%

Night: Mostly cloudy with a chance of showers and thunderstorms. Near steady temperature in the upper 60s. Northeast winds around 10 mph. Chance of rain 50 percent.

Names listed above may include county names.

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