Main Lake, IL Weather Forecast & Current Conditions

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Main Lake Weather Map
UTC Time: 10/10/2026, 13:08
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
Auto-refresh in: 5:02

Main Lake, IL Regional Weather

Expires:202610101400;;855160
ASUS43 KLOT 101301
RWRIL 

ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
800 AM CDT SAT OCT 10 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>094-101400-
SOUTH-CENTRAL ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
CARBONDALE     CLOUDY    54  52  93 CALM      30.09R TC  12           
CAIRO*         MOSUNNY   58  57  97 CALM      30.07F TC  14           
EFFINGHAM*     PTSUNNY   54  50  89 CALM      30.13S TC  12           
MT. VERNON     CLOUDY    53  51  93 N3        30.11R TC  12           
CENTRALIA*     PTSUNNY   57  49  73 E5        30.10S TC  14           
SALEM*         PTSUNNY   62  50  64 MISG      30.10S TC  17           
METROPOLIS*    PTSUNNY   56  56  97 CALM      30.08R TC  14           
$$


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

Main Lake, IL

Today
Rain Showers
75°/ 55° 24°/ 13°
50%
Sunday
Mostly Cloudy
82°/ 58° 28°/ 14°
0%
Columbus Day
Sunny
90°32°
0%
Mon Night
Clear
65°18°
0%
Tue-Tue Night
Clear
90°32°
0%
Wed-Wed Night
Rain Showers
82°28°
50%
Thursday
Rain Showers
80°/ 55° 27°/ 13°
50%
Friday
Partly Cloudy
72°22°
0%

Day: Cloudy. A slight chance of showers this afternoon. Highs in the mid 70s. East winds 5 to 10 mph. Chance of rain 20 percent.

Night: Mostly cloudy. A chance of showers, mainly in the evening. Lows in the mid 50s. Northeast winds 10 to 15 mph. Chance of rain 50 percent.

Carmi, IL

Today
Rain Showers
72°/ 58° 22°/ 14°
70%
Sunday
Rain Showers
80°/ 58° 27°/ 14°
40%
Columbus Day
Sunny
90°32°
0%
Mon Night-Tue
Clear
65°18°
0%
Tue Night
Clear
65°18°
0%
Wed-Wed Night
Rain Showers
82°28°
50%
Thursday
Rain Showers
80°/ 55° 27°/ 13°
50%
Friday
Sunny
72°22°
0%

Day: Mostly cloudy. A chance of showers this afternoon. Cooler with highs in the lower 70s. East winds 5 to 10 mph. Chance of rain 50 percent.

Night: Cloudy with a slight chance of thunderstorms. Showers likely, mainly in the evening. Lows in the upper 50s. Northeast winds 10 to 15 mph. Chance of rain 70 percent.

Harrisburg, IL

Today
Rain Showers
72°/ 55° 22°/ 13°
70%
Sunday
Mostly Cloudy
82°/ 58° 28°/ 14°
0%
Columbus Day
Sunny
88°31°
0%
Mon Night-Tue
Clear
65°18°
0%
Tue Night
Clear
65°18°
0%
Wed-Wed Night
Rain Showers
82°28°
50%
Thursday
Rain Showers
82°/ 55° 28°/ 13°
50%
Friday
Sunny
72°22°
0%

Day: Cloudy. A chance of showers this afternoon. Cooler with highs in the lower 70s. East winds 5 to 10 mph. Chance of rain 50 percent.

Night: Cloudy. Showers likely, mainly in the evening. Lows in the mid 50s. Northeast winds 10 to 15 mph. Chance of rain 70 percent.

Shawneetown, IL

Today
Thunderstorms
72°/ 55° 22°/ 13°
80%
Sunday
Rain Showers
78°/ 58° 26°/ 14°
40%
Columbus Day
Sunny
88°31°
0%
Mon Night-Tue
Clear
65°18°
0%
Tue Night
Clear
65°18°
0%
Wed-Wed Night
Rain Showers
82°28°
50%
Thursday
Rain Showers
80°/ 55° 27°/ 13°
40%
Friday
Sunny
72°22°
0%

Day: Mostly cloudy. A chance of showers with a slight chance of thunderstorms this afternoon. Cooler with highs in the lower 70s. East winds around 5 mph, increasing to 10 to 15 mph this afternoon. Chance of rain 50 percent.

Night: Cloudy with a slight chance of thunderstorms. Showers, mainly in the evening. Lows in the mid 50s. Northeast winds 10 to 15 mph. Chance of rain 80 percent.

Fairfield, IL

Today
Mostly Cloudy
75°/ 55° 24°/ 13°
50%
Sunday
Mostly Cloudy
82°/ 58° 28°/ 14°
0%
Columbus Day
Sunny
92°33°
0%
Mon Night
Clear
65°18°
0%
Tue-Tue Night
Clear
88°31°
0%
Wed-Wed Night
Rain Showers
80°27°
50%
Thursday
Rain Showers
78°/ 55° 26°/ 13°
50%
Friday
Partly Cloudy
72°22°
0%

Day: Mostly cloudy. Highs in the mid 70s. East winds 5 to 10 mph.

Night: Mostly cloudy. A chance of showers, mainly in the evening. Lows in the mid 50s. Northeast winds 10 to 15 mph. Chance of rain 50 percent.

West Frankfort, IL

Today
Cloudy
75°/ 55° 24°/ 13°
50%
Sunday
Partly Cloudy
82°/ 58° 28°/ 14°
0%
Columbus Day
Sunny
90°32°
0%
Mon Night
Clear
65°18°
0%
Tue-Tue Night
Clear
90°32°
0%
Wed-Wed Night
Rain Showers
82°28°
50%
Thursday
Rain Showers
82°/ 55° 28°/ 13°
50%
Friday
Partly Cloudy
72°22°
0%

Day: Cloudy. Highs in the mid 70s. East winds 5 to 10 mph.

Night: Cloudy. A chance of showers, mainly in the evening. Lows in the mid 50s. Northeast winds 10 to 15 mph. Chance of rain 50 percent.

Mount Vernon, IL

Today
Mostly Cloudy
75°/ 55° 24°/ 13°
40%
Sunday
Sunny
82°/ 58° 28°/ 14°
0%
Columbus Day
Sunny
92°33°
0%
Mon Night
Clear
68°20°
0%
Tue-Tue Night
Clear
90°32°
0%
Wed-Wed Night
Rain Showers
82°28°
50%
Thursday
Rain Showers
80°/ 55° 27°/ 13°
50%
Friday
Partly Cloudy
72°22°
0%

Day: Mostly cloudy. Highs in the mid 70s. East winds 5 to 10 mph.

Night: Mostly cloudy. A chance of showers in the evening. Lows in the mid 50s. Northeast winds 5 to 10 mph. Chance of rain 40 percent.

Albion, IL

Today
Rain Showers
75°/ 58° 24°/ 14°
70%
Sunday
Mostly Cloudy
80°/ 58° 27°/ 14°
0%
Columbus Day
Sunny
88°31°
0%
Mon Night
Clear
65°18°
0%
Tue-Tue Night
Clear
88°31°
0%
Wednesday
Rain Showers
78°/ 60° 26°/ 16°
50%
Thursday
Rain Showers
78°/ 55° 26°/ 13°
40%
Friday
Sunny
72°22°
0%

Day: Mostly cloudy. A slight chance of showers this afternoon. Highs in the mid 70s. East winds 5 to 10 mph. Chance of rain 20 percent.

Night: Mostly cloudy. Showers likely with a slight chance of thunderstorms in the evening, then a chance of showers after midnight. Lows in the upper 50s. Northeast winds 10 to 15 mph. Chance of rain 70 percent.

Poseyville, IN

Today
Thunderstorms
72°/ 58° 22°/ 14°
80%
Sunday
Rain Showers
78°/ 58° 26°/ 14°
40%
Columbus Day
Sunny
88°31°
0%
Mon Night-Tue
Clear
65°18°
0%
Tue Night
Clear
65°18°
0%
Wed-Wed Night
Rain Showers
80°27°
50%
Thursday
Rain Showers
80°/ 55° 27°/ 13°
40%
Friday
Sunny
72°22°
0%

Day: Mostly cloudy. A chance of showers with a slight chance of thunderstorms this afternoon. Highs in the lower 70s. East winds around 5 mph, increasing to 10 to 15 mph this afternoon. Chance of rain 50 percent.

Night: Mostly cloudy. Showers with a chance of thunderstorms in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. Lows in the upper 50s. Northeast winds 10 to 15 mph. Chance of rain 80 percent.

Herrin, IL

Today
Rain Showers
75°/ 55° 24°/ 13°
50%
Sunday
Mostly Cloudy
82°/ 60° 28°/ 16°
0%
Columbus Day
Sunny
88°31°
0%
Mon Night-Tue
Clear
65°18°
0%
Tue Night
Clear
65°18°
0%
Wed-Wed Night
Rain Showers
82°28°
50%
Thursday
Rain Showers
80°/ 55° 27°/ 13°
50%
Friday
Partly Cloudy
72°22°
0%

Day: Cloudy. A slight chance of showers this afternoon. Cooler with highs in the mid 70s. East winds 5 to 10 mph. Chance of rain 20 percent.

Night: Cloudy. A chance of showers, mainly in the evening. Lows in the mid 50s. Northeast winds 10 to 15 mph, diminishing to around 5 mph after midnight. Chance of rain 50 percent.

Mount Carmel, IL

Today
Rain Showers
75°/ 58° 24°/ 14°
70%
Sunday
Mostly Cloudy
78°/ 58° 26°/ 14°
0%
Columbus Day
Sunny
88°31°
0%
Mon Night-Tue
Clear
65°18°
0%
Tue Night
Clear
62°17°
0%
Wednesday
Rain Showers
78°/ 60° 26°/ 16°
50%
Thursday
Rain Showers
78°/ 55° 26°/ 13°
40%
Friday
Sunny
70°21°
0%

Day: Mostly cloudy. A chance of showers this afternoon. Highs in the mid 70s. East winds 5 to 10 mph. Chance of rain 40 percent.

Night: Mostly cloudy with a slight chance of thunderstorms. Showers likely, mainly in the evening. Lows in the upper 50s. Northeast winds 10 to 15 mph. Chance of rain 70 percent.

Morganfield, KY

Today
Thunderstorms
72°/ 55° 22°/ 13°
90%
Sunday
Rain Showers
78°/ 58° 26°/ 14°
50%
Columbus Day
Sunny
88°31°
0%
Mon Night-Tue
Clear
65°18°
0%
Tue Night
Clear
65°18°
0%
Wednesday
Rain Showers
82°28°
40%
Thursday
Rain Showers
82°/ 55° 28°/ 13°
40%
Friday
Sunny
72°22°
0%

Day: Cloudy. Showers likely with a slight chance of thunderstorms this afternoon. Cooler with highs in the lower 70s. East winds around 5 mph, increasing to 10 to 15 mph this afternoon. Chance of rain 70 percent.

Night: Cloudy. Showers with a chance of thunderstorms in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. Lows in the mid 50s. Northeast winds 10 to 15 mph. Chance of rain 90 percent.

Golconda, IL

Today
Thunderstorms
72°/ 55° 22°/ 13°
70%
Sunday
Rain Showers
80°/ 58° 27°/ 14°
40%
Columbus Day
Sunny
88°31°
0%
Mon Night-Tue
Clear
65°18°
0%
Tue Night
Clear
65°18°
0%
Wed-Wed Night
Rain Showers
82°28°
50%
Thursday
Rain Showers
82°/ 58° 28°/ 14°
40%
Friday
Sunny
72°22°
0%

Day: Cloudy. A chance of showers with a slight chance of thunderstorms this afternoon. Cooler with highs in the lower 70s. East winds 5 to 10 mph. Chance of rain 50 percent.

Night: Cloudy. Showers likely with a slight chance of thunderstorms in the evening, then a chance of showers after midnight. Lows in the mid 50s. Northeast winds 5 to 10 mph. Gusts up to 25 mph in the evening. Chance of rain 70 percent.

Elizabethtown, IL

Today
Thunderstorms
72°/ 55° 22°/ 13°
90%
Sunday
Rain Showers
78°/ 58° 26°/ 14°
50%
Columbus Day
Sunny
85°29°
0%
Mon Night-Tue
Clear
65°18°
0%
Tue Night
Clear
65°18°
0%
Wednesday
Rain Showers
82°28°
40%
Thursday
Rain Showers
82°/ 55° 28°/ 13°
40%
Friday
Sunny
72°22°
0%

Day: Cloudy. Showers likely with a slight chance of thunderstorms this afternoon. Cooler with highs in the lower 70s. East winds 5 to 10 mph. Chance of rain 70 percent.

Night: Cloudy with a slight chance of thunderstorms. Showers, mainly in the evening. Lows in the mid 50s. Northeast winds 5 to 10 mph. Gusts up to 25 mph in the evening. Chance of rain 90 percent.

Henderson, KY

Today
Thunderstorms
72°/ 58° 22°/ 14°
70%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
50%
Columbus Day
Sunny
88°31°
0%
Mon Night-Tue
Clear
65°18°
0%
Tue Night
Clear
65°18°
0%
Wed-Wed Night
Rain Showers
82°28°
50%
Thursday
Rain Showers
80°/ 55° 27°/ 13°
40%
Friday
Sunny
72°22°
0%

Day: Cloudy. Showers likely with a slight chance of thunderstorms this afternoon. Cooler with highs in the lower 70s. East winds 10 to 15 mph. Chance of rain 70 percent.

Night: Showers likely. A chance of thunderstorms, mainly in the evening. Lows in the upper 50s. Northeast winds 10 to 15 mph. Chance of rain 70 percent.

Vienna, IL

Today
Rain Showers
72°/ 55° 22°/ 13°
70%
Sunday
Partly Cloudy
82°/ 58° 28°/ 14°
0%
Columbus Day
Sunny
88°31°
0%
Mon Night-Tue
Clear
65°18°
0%
Tue Night
Clear
65°18°
0%
Wed-Wed Night
Rain Showers
82°28°
50%
Thursday
Rain Showers
80°/ 55° 27°/ 13°
40%
Friday
Sunny
72°22°
0%

Day: Cloudy. A chance of showers this afternoon. Cooler with highs in the lower 70s. East winds 5 to 10 mph. Chance of rain 50 percent.

Night: Cloudy. Showers likely, mainly in the evening. Lows in the mid 50s. Northeast winds 5 to 10 mph. Gusts up to 25 mph in the evening. Chance of rain 70 percent.

Fort Branch, IN

Today
Rain Showers
72°/ 58° 22°/ 14°
50%
Sunday
Rain Showers
78°/ 58° 26°/ 14°
40%
Columbus Day
Sunny
88°31°
0%
Mon Night
Clear
65°18°
0%
Tue-Tue Night
Clear
88°31°
0%
Wednesday
Rain Showers
78°/ 60° 26°/ 16°
50%
Thursday
Rain Showers
78°/ 55° 26°/ 13°
40%
Friday
Sunny
72°22°
0%

Day: Mostly cloudy. A chance of showers this afternoon. Highs in the lower 70s. East winds around 5 mph, increasing to 10 to 15 mph this afternoon. Chance of rain 50 percent.

Night: Mostly cloudy with a chance of showers. A chance of thunderstorms, mainly in the evening. Lows in the upper 50s. Northeast winds 10 to 15 mph. Chance of rain 50 percent.

Evansville, IN

Today
Thunderstorms
72°/ 58° 22°/ 14°
80%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
40%
Columbus Day
Sunny
88°31°
0%
Mon Night-Tue
Clear
65°18°
0%
Tue Night
Clear
65°18°
0%
Wed-Wed Night
Rain Showers
80°27°
50%
Thursday
Rain Showers
80°/ 58° 27°/ 14°
40%
Friday
Sunny
72°22°
0%

Day: Cloudy. Showers likely with a slight chance of thunderstorms this afternoon. Cooler with highs in the lower 70s. East winds around 5 mph, increasing to 10 to 15 mph with gusts up to 25 mph this afternoon. Chance of rain 70 percent.

Night: Mostly cloudy. Showers with a chance of thunderstorms in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. Lows in the upper 50s. Northeast winds 10 to 15 mph. Chance of rain 80 percent.

Marion, KY

Today
Thunderstorms
70°/ 55° 21°/ 13°
90%
Sunday
Rain Showers
78°/ 58° 26°/ 14°
50%
Columbus Day
Sunny
85°29°
0%
Mon Night-Tue
Clear
65°18°
0%
Tue Night
Clear
65°18°
0%
Wednesday
Rain Showers
82°28°
40%
Thursday
Rain Showers
82°/ 55° 28°/ 13°
40%
Friday
Sunny
72°22°
0%

Day: Cloudy. Showers with a chance of thunderstorms this afternoon. Cooler with highs around 70. East winds 5 to 10 mph. Chance of rain 80 percent.

Night: Mostly cloudy. Showers with a chance of thunderstorms in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. Lows in the mid 50s. Northeast winds 10 to 15 mph. Chance of rain 90 percent.

Pinckneyville, IL

Today
Mostly Cloudy
78°/ 55° 26°/ 13°
20%
Sunday
Sunny
85°/ 60° 29°/ 16°
0%
Columbus Day
Sunny
92°33°
0%
Mon Night
Clear
65°18°
0%
Tue-Tue Night
Clear
92°33°
0%
Wed-Wed Night
Rain Showers
82°28°
50%
Thursday
Rain Showers
80°/ 55° 27°/ 13°
50%
Friday
Partly Cloudy
72°22°
0%

Day: Mostly cloudy. Highs in the upper 70s. East winds 5 to 10 mph.

Night: Mostly cloudy. A slight chance of showers in the evening. Lows in the mid 50s. Northeast winds 5 to 10 mph. Chance of rain 20 percent.

Names listed above may include county names.

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