Merriam, IL Weather Forecast & Current Conditions

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Merriam, IL Weather Maps

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Merriam Weather Map
UTC Time: 10/6/2026, 21:19
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
Auto-refresh in: 5:02

Merriam, IL Regional Weather

Expires:202610062200;;646782
ASUS43 KLOT 062110
RWRIL 

ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
400 PM CDT TUE OCT 06 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>094-062200-
SOUTH-CENTRAL ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
CARBONDALE     SUNNY     79  45  29 S6        30.00F TC  26           
CAIRO*         SUNNY     80  47  31 E3        30.01S TC  27           
EFFINGHAM*     SUNNY     76  35  23 SE6       30.03F TC  24           
MARION         SUNNY     77  45  31 CALM      30.01F TC  25           
MT. VERNON     SUNNY     80  44  27 S9        30.01F HAZE    TC  27   
SALEM*         SUNNY     79  43  27 MISG      30.01F TC  26           
METROPOLIS*    SUNNY     78  37  22 CALM      30.02S TC  26           
$$


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

Merriam, IL

Afternoon
Sunny
75°/ 52° 24°/ 11°
0%
Wednesday
Sunny
88°/ 55° 31°/ 13°
0%
Thursday
Sunny
82°/ 52° 28°/ 11°
0%
Friday
Sunny
82°/ 55° 28°/ 13°
0%
Saturday
Sunny
88°/ 58° 31°/ 14°
50%
Sunday
Rain Showers
78°/ 58° 26°/ 14°
50%

Day: Sunny. Near steady temperature in the mid 70s. South winds around 5 mph.

Night: Clear. Lows in the lower 50s. South winds around 5 mph.

Carmi, IL

Afternoon
Sunny
75°/ 52° 24°/ 11°
0%
Wednesday
Sunny
85°/ 58° 29°/ 14°
0%
Thursday
Sunny
85°/ 52° 29°/ 11°
0%
Fri Night-Sat
Clear
55°13°
0%
Sat Night
Rain Showers
58°14°
50%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
50%
Columbus Day
Sunny
80°27°
0%

Day: Sunny. Near steady temperature in the mid 70s. Southeast winds around 5 mph.

Night: Clear. Lows in the lower 50s. Calm winds.

Albion, IL

Afternoon
Sunny
75°/ 52° 24°/ 11°
0%
Wednesday
Sunny
85°/ 55° 29°/ 13°
0%
Thursday
Sunny
82°/ 52° 28°/ 11°
0%
Friday
Sunny
82°/ 55° 28°/ 13°
0%
Saturday
Sunny
85°/ 58° 29°/ 14°
50%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
50%
Columbus Day
Sunny
82°28°
0%

Day: Sunny. Near steady temperature in the mid 70s. Southeast winds around 5 mph.

Night: Clear. Lows in the lower 50s. Calm winds, becoming south around 5 mph after midnight.

McLeansboro, IL

Afternoon
Sunny
75°/ 52° 24°/ 11°
0%
Wednesday
Sunny
88°/ 58° 31°/ 14°
0%
Thursday
Sunny
85°/ 55° 29°/ 13°
0%
Fri Night
Clear
55°13°
0%
Saturday
Sunny
88°/ 58° 31°/ 14°
50%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
50%

Day: Sunny. Near steady temperature in the mid 70s. Southeast winds around 5 mph.

Night: Clear. Lows in the lower 50s. Calm winds.

Mount Carmel, IL

Afternoon
Sunny
75°/ 52° 24°/ 11°
0%
Wednesday
Sunny
85°/ 55° 29°/ 13°
0%
Thursday
Sunny
82°/ 52° 28°/ 11°
0%
Fri Night
Clear
55°13°
0%
Saturday
Sunny
85°/ 58° 29°/ 14°
50%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
50%
Columbus Day
Sunny
80°27°
0%

Day: Sunny. Near steady temperature in the mid 70s. Southeast winds around 5 mph.

Night: Clear. Lows in the lower 50s. Calm winds, becoming south around 5 mph after midnight.

Poseyville, IN

Afternoon
Sunny
75°/ 52° 24°/ 11°
0%
Wednesday
Sunny
85°/ 58° 29°/ 14°
0%
Thursday
Sunny
82°/ 52° 28°/ 11°
0%
Fri Night-Sat
Clear
55°13°
0%
Sat Night
Rain Showers
58°14°
50%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
60%
Columbus Day
Sunny
78°26°
0%

Day: Sunny. Near steady temperature in the mid 70s. Southeast winds around 5 mph.

Night: Clear. Lows in the lower 50s. Calm winds.

Mount Vernon, IL

Afternoon
Sunny
78°/ 52° 26°/ 11°
0%
Wednesday
Sunny
88°/ 55° 31°/ 13°
0%
Thursday
Sunny
85°/ 52° 29°/ 11°
0%
Fri Night
Clear
55°13°
0%
Saturday
Sunny
88°/ 58° 31°/ 14°
50%
Sunday
Rain Showers
78°/ 55° 26°/ 13°
50%

Day: Sunny. Near steady temperature in the upper 70s. South winds around 5 mph.

Night: Clear. Lows in the lower 50s. Calm winds, becoming southwest around 5 mph after midnight.

West Frankfort, IL

Afternoon
Sunny
78°/ 52° 26°/ 11°
0%
Wednesday
Sunny
88°/ 58° 31°/ 14°
0%
Thursday
Sunny
85°/ 55° 29°/ 13°
0%
Fri Night
Clear
55°13°
0%
Saturday
Sunny
88°/ 58° 31°/ 14°
50%
Sunday
Rain Showers
78°/ 58° 26°/ 14°
50%

Day: Sunny. Near steady temperature in the upper 70s. Southeast winds around 5 mph.

Night: Clear. Lows in the lower 50s. Calm winds, becoming south around 5 mph after midnight.

Fort Branch, IN

Afternoon
Sunny
75°/ 52° 24°/ 11°
0%
Wednesday
Sunny
85°/ 55° 29°/ 13°
0%
Thursday
Sunny
82°/ 52° 28°/ 11°
0%
Fri Night-Sat
Clear
55°13°
0%
Sat Night
Rain Showers
58°14°
50%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
50%
Columbus Day
Sunny
78°26°
0%

Day: Sunny. Near steady temperature in the mid 70s. Southeast winds around 5 mph.

Night: Clear. Lows in the lower 50s. Calm winds, becoming south around 5 mph after midnight.

Shawneetown, IL

Afternoon
Sunny
75°/ 52° 24°/ 11°
0%
Wednesday
Sunny
85°/ 58° 29°/ 14°
0%
Thursday
Sunny
85°/ 52° 29°/ 11°
0%
Fri Night
Clear
55°13°
0%
Saturday
Sunny
85°/ 58° 29°/ 14°
50%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
50%
Columbus Day
Sunny
80°27°
0%

Day: Sunny. Near steady temperature in the mid 70s. Southeast winds around 5 mph.

Night: Clear. Lows in the lower 50s. Calm winds.

Harrisburg, IL

Afternoon
Sunny
75°/ 52° 24°/ 11°
0%
Wednesday
Sunny
85°/ 58° 29°/ 14°
0%
Thursday
Sunny
85°/ 52° 29°/ 11°
0%
Fri Night
Clear
58°14°
0%
Saturday
Sunny
85°/ 58° 29°/ 14°
50%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
50%
Columbus Day
Sunny
80°27°
0%

Day: Sunny. Near steady temperature in the mid 70s. Southeast winds around 5 mph.

Night: Clear. Lows in the lower 50s. Calm winds.

Vincennes, IN

Tonight
Clear
50°10°
0%
Wednesday
Sunny
85°/ 55° 29°/ 13°
0%
Thursday
Sunny
82°/ 48° 28°/ 9°
0%
Fri-Fri Night
Clear
80°27°
0%
Saturday
Cloudy
85°/ 58° 29°/ 14°
50%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
50%
Mon Night-Tue
Rain Showers
58°14°
20%

Night: Clear. Lows around 50. South winds around 5 mph.

Evansville, IN

Afternoon
Sunny
75°/ 52° 24°/ 11°
0%
Wednesday
Sunny
85°/ 58° 29°/ 14°
0%
Thursday
Sunny
82°/ 52° 28°/ 11°
0%
Fri Night-Sat
Clear
55°13°
0%
Sat Night
Rain Showers
58°14°
50%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
60%
Columbus Day
Sunny
78°26°
0%

Day: Sunny. Near steady temperature in the mid 70s. Southeast winds around 5 mph.

Night: Clear. Lows in the lower 50s. Calm winds.

Morganfield, KY

Afternoon
Sunny
75°/ 50° 24°/ 10°
0%
Wednesday
Sunny
82°/ 58° 28°/ 14°
0%
Thursday
Sunny
82°/ 52° 28°/ 11°
0%
Fri Night
Clear
55°13°
0%
Saturday
Sunny
85°/ 58° 29°/ 14°
50%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
60%
Columbus Day
Sunny
78°26°
0%

Day: Sunny. Near steady temperature in the mid 70s. Southeast winds around 5 mph.

Night: Clear. Lows around 50. Calm winds.

Boonville, IN

Afternoon
Sunny
75°/ 50° 24°/ 10°
0%
Wednesday
Sunny
82°/ 55° 28°/ 13°
0%
Thursday
Sunny
82°/ 52° 28°/ 11°
0%
Fri Night
Clear
55°13°
0%
Saturday
Sunny
85°/ 58° 29°/ 14°
50%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
60%

Day: Sunny. Near steady temperature in the mid 70s. Southeast winds around 5 mph.

Night: Clear. Lows around 50. Calm winds.

Herrin, IL

Afternoon
Sunny
78°/ 52° 26°/ 11°
0%
Wednesday
Sunny
85°/ 58° 29°/ 14°
0%
Thursday
Sunny
85°/ 52° 29°/ 11°
0%
Fri Night
Clear
58°14°
0%
Saturday
Sunny
85°/ 58° 29°/ 14°
50%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
50%
Columbus Day
Sunny
80°27°
0%

Day: Sunny. Near steady temperature in the upper 70s. Southeast winds around 5 mph.

Night: Clear. Lows in the lower 50s. Calm winds.

Henderson, KY

Afternoon
Sunny
75°/ 52° 24°/ 11°
0%
Wednesday
Sunny
85°/ 58° 29°/ 14°
0%
Thursday
Sunny
82°/ 52° 28°/ 11°
0%
Fri Night
Clear
55°13°
0%
Saturday
Sunny
85°/ 58° 29°/ 14°
50%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
60%
Columbus Day
Sunny
78°26°
0%

Day: Sunny. Near steady temperature in the mid 70s. Southeast winds around 5 mph.

Night: Clear. Lows in the lower 50s. Calm winds.

Petersburg, IN

Afternoon
Sunny
75°/ 50° 24°/ 10°
0%
Wednesday
Sunny
85°/ 55° 29°/ 13°
0%
Thursday
Sunny
82°/ 50° 28°/ 10°
0%
Fri Night-Sat
Clear
55°13°
0%
Sat Night-Sun
Rain Showers
58°14°
50%
Sun Night
Mostly Cloudy
58°14°
0%
Columbus Day
Sunny
78°26°
0%

Day: Sunny. Near steady temperature in the mid 70s. Southeast winds around 5 mph.

Night: Clear. Lows around 50. Calm winds, becoming south around 5 mph after midnight.

Pinckneyville, IL

Afternoon
Sunny
78°/ 52° 26°/ 11°
0%
Wednesday
Sunny
88°/ 58° 31°/ 14°
0%
Thursday
Sunny
85°/ 55° 29°/ 13°
0%
Fri Night
Clear
55°13°
0%
Saturday
Sunny
88°/ 58° 31°/ 14°
50%
Sunday
Rain Showers
78°/ 55° 26°/ 13°
50%

Day: Sunny. Near steady temperature in the upper 70s. South winds around 5 mph.

Night: Clear. Lows in the lower 50s. South winds around 5 mph.

Elizabethtown, IL

Afternoon
Sunny
75°/ 52° 24°/ 11°
0%
Wednesday
Sunny
82°/ 58° 28°/ 14°
0%
Thursday
Sunny
82°/ 52° 28°/ 11°
0%
Fri Night
Clear
58°14°
0%
Saturday
Sunny
82°/ 58° 28°/ 14°
50%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
50%
Columbus Day
Sunny
78°26°
0%

Day: Sunny. Near steady temperature in the mid 70s. Southeast winds around 5 mph.

Night: Clear. Lows in the lower 50s. Calm winds.

Names listed above may include county names.

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