Allendale, IL Weather Forecast & Current Conditions

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Allendale, IL Weather Maps

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Allendale Weather Map
UTC Time: 9/21/2026, 18:14
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
Auto-refresh in: 5:02

Allendale, IL Regional Weather

Expires:202609211900;;828972
ASUS43 KLOT 211810
RWRIL 

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


ILZ067-068-072-073-078-083-087-091-211900-
SOUTHEAST ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
LAWRENCEVILLE  CLOUDY    69  66  90 N10       30.01F TC  21           
FLORA*         CLOUDY    68 N/A N/A NE7       30.02F FOG     TC  20   
FAIRFIELD*     PTSUNNY   76  68  75 N10G16    29.99F TC  24           
HARRISBURG*    PTSUNNY   85  67  54 NW8       29.99S HX  87  TC  29   
ROBINSON*      CLOUDY    68  66  94 NE8       30.02S TC  20           
$$

ABBREVIATIONS USED IN REMARKS
   TC - TEMPERATURE IN CELSIUS
  WCI - WIND CHILL INDEX
   HX - HEAT INDEX
  VSB - VISIBILITY
$$

  

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

Allendale, IL

Today
Thunderstorms
82°/ 62° 28°/ 17°
50%
Tuesday
Mostly Cloudy
78°/ 58° 26°/ 14°
0%
Wednesday
Sunny
75°/ 55° 24°/ 13°
0%
Thursday
Cloudy
55°13°
0%
Friday
Cloudy
55°/ 52° 13°/ 11°
0%
Saturday
Cloudy
78°26°
0%
Sunday
Cloudy
78°26°
0%

Day: Mostly cloudy. A chance of showers and thunderstorms this morning, then a slight chance of showers this afternoon. Highs in the lower 80s. North winds 5 to 10 mph. Chance of rain 50 percent.

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

Fort Branch, IN

Today
Thunderstorms
82°/ 62° 28°/ 17°
20%
Tuesday
Mostly Cloudy
78°/ 58° 26°/ 14°
0%
Wednesday
Sunny
75°/ 58° 24°/ 14°
0%
Thu Night
Cloudy
55°13°
0%
Friday
Sunny
78°/ 52° 26°/ 11°
0%
Saturday
Cloudy
78°26°
0%
Sunday
Cloudy
78°26°
0%

Day: A slight chance of thunderstorms this morning. Mostly cloudy with a slight chance of showers. Highs in the lower 80s. North winds 5 to 10 mph. Chance of rain 20 percent.

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

Vincennes, IN

Afternoon
Rain Showers
78°/ 58° 26°/ 14°
20%
Tuesday
Mostly Cloudy
75°/ 58° 24°/ 14°
0%
Wednesday
Cloudy
72°/ 58° 22°/ 14°
0%
Thursday
Cloudy
58°14°
0%
Friday
Cloudy
58°/ 52° 14°/ 11°
0%
Saturday
Cloudy
52°11°
0%
Sunday
Cloudy
52°11°
0%

Day: Mostly cloudy with a 20 percent chance of showers. Not as warm with highs in the upper 70s. North winds 5 to 10 mph.

Night: Partly cloudy through the late overnight, then becoming mostly cloudy. Lows in the upper 50s. Northeast winds 5 to 10 mph.

Albion, IL

Today
Thunderstorms
82°/ 62° 28°/ 17°
40%
Tuesday
Mostly Cloudy
78°/ 58° 26°/ 14°
0%
Wednesday
Sunny
75°/ 55° 24°/ 13°
0%
Thu Night
Cloudy
55°13°
0%
Friday
Cloudy
78°26°
0%
Saturday
Cloudy
78°26°
0%
Sunday
Cloudy
78°26°
0%

Day: Mostly cloudy. A chance of showers and thunderstorms this morning, then a slight chance of showers this afternoon. Cooler with highs in the lower 80s. 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.

Petersburg, IN

Today
Thunderstorms
82°/ 62° 28°/ 17°
20%
Tuesday
Mostly Cloudy
78°/ 58° 26°/ 14°
0%
Wednesday
Partly Cloudy
75°/ 58° 24°/ 14°
0%
Thursday
Cloudy
58°14°
0%
Friday
Cloudy
58°/ 52° 14°/ 11°
0%
Saturday
Cloudy
78°26°
0%
Sunday
Cloudy
78°26°
0%

Day: A slight chance of thunderstorms this morning. Mostly cloudy with a slight chance of showers. Highs in the lower 80s. North winds 5 to 10 mph. Chance of rain 20 percent.

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

Poseyville, IN

Today
Rain Showers
85°/ 62° 29°/ 17°
20%
Tuesday
Mostly Cloudy
78°/ 58° 26°/ 14°
0%
Wednesday
Sunny
78°/ 55° 26°/ 13°
0%
Thu Night
Clear
55°13°
0%
Friday
Cloudy
80°27°
0%
Saturday
Cloudy
80°27°
0%
Sunday
Cloudy
80°27°
0%

Day: Mostly cloudy this morning, then becoming partly sunny. A 20 percent chance of showers. Highs in the mid 80s. North winds 5 to 10 mph.

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

Boonville, IN

Today
Rain Showers
85°/ 62° 29°/ 17°
20%
Tuesday
Mostly Cloudy
78°/ 60° 26°/ 16°
0%
Wednesday
Partly Cloudy
75°/ 58° 24°/ 14°
0%
Thu Night
Clear
55°13°
0%
Friday
Sunny
78°/ 52° 26°/ 11°
0%
Saturday
Cloudy
78°26°
0%
Sunday
Cloudy
78°26°
0%

Day: Mostly cloudy. A slight chance of showers this afternoon. Highs in the mid 80s. North winds 5 to 10 mph. Chance of rain 20 percent.

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

Washington, IN

Afternoon
Rain Showers
78°/ 58° 26°/ 14°
20%
Tuesday
Mostly Cloudy
75°/ 58° 24°/ 14°
0%
Wednesday
Cloudy
72°/ 55° 22°/ 13°
0%
Thursday
Cloudy
55°13°
0%
Friday
Cloudy
55°/ 52° 13°/ 11°
0%
Saturday
Cloudy
52°11°
0%
Sunday
Cloudy
52°11°
0%

Day: Mostly cloudy with a 20 percent chance of showers. Not as warm with highs in the upper 70s. North winds 5 to 10 mph.

Night: Partly cloudy through the late overnight, then becoming mostly cloudy. Lows in the upper 50s. Northeast winds around 5 mph.

Carmi, IL

Today
Thunderstorms
85°/ 62° 29°/ 17°
20%
Tuesday
Partly Cloudy
78°/ 58° 26°/ 14°
0%
Wednesday
Sunny
78°/ 55° 26°/ 13°
0%
Thu Night
Clear
55°13°
0%
Friday
Cloudy
80°27°
0%
Saturday
Cloudy
80°27°
0%
Sunday
Cloudy
80°27°
0%

Day: Mostly cloudy with a slight chance of showers and thunderstorms this morning, then partly sunny this afternoon. Highs in the mid 80s. North winds 5 to 10 mph. Chance of rain 20 percent.

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

Fairfield, IL

Today
Thunderstorms
82°/ 60° 28°/ 16°
40%
Tuesday
Partly Cloudy
75°/ 55° 24°/ 13°
0%
Wednesday
Sunny
75°/ 55° 24°/ 13°
0%
Thu Night
Cloudy
55°13°
0%
Friday
Cloudy
78°26°
0%
Sat Night
Cloudy
78°26°
0%
Sunday
Sunny
82°28°
0%

Day: Mostly cloudy with a chance of showers and thunderstorms this morning, then partly sunny this afternoon. Highs in the lower 80s. North winds 5 to 10 mph. Chance of rain 40 percent.

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

Evansville, IN

Today
Rain Showers
85°/ 62° 29°/ 17°
20%
Tuesday
Mostly Cloudy
78°/ 60° 26°/ 16°
0%
Wednesday
Sunny
78°/ 58° 26°/ 14°
0%
Thu Night
Clear
58°14°
0%
Friday
Sunny
78°/ 55° 26°/ 13°
0%
Saturday
Cloudy
80°27°
0%
Sunday
Cloudy
80°27°
0%

Day: Mostly cloudy this morning, then becoming partly sunny. A 20 percent chance of showers. Highs in the mid 80s. North winds 5 to 10 mph.

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

Sullivan, IN

Afternoon
Rain Showers
75°/ 58° 24°/ 14°
20%
Tuesday
Mostly Cloudy
72°/ 58° 22°/ 14°
0%
Wednesday
Cloudy
72°/ 55° 22°/ 13°
0%
Thursday
Cloudy
55°13°
0%
Friday
Cloudy
55°/ 52° 13°/ 11°
0%
Saturday
Cloudy
52°11°
0%
Sunday
Cloudy
52°11°
0%

Day: Mostly cloudy. A slight chance of showers early. Not as warm with highs in the mid 70s. Northeast winds 5 to 10 mph. Chance of rain 20 percent.

Night: Partly cloudy through the late overnight, then becoming mostly cloudy. Lows in the upper 50s. Northeast winds 5 to 10 mph.

Jasper, IN

Today
Thunderstorms
85°/ 62° 29°/ 17°
20%
Tuesday
Mostly Cloudy
75°/ 58° 24°/ 14°
0%
Wednesday
Partly Cloudy
75°/ 58° 24°/ 14°
0%
Thursday
Sunny
75°/ 55° 24°/ 13°
0%
Friday
Sunny
75°/ 52° 24°/ 11°
0%
Saturday
Sunny
75°/ 52° 24°/ 11°
0%
Sunday
Sunny
78°26°
0%

Day: Not as warm. Mostly cloudy. Slight chance of thunderstorms in the morning, then slight chance of showers in the afternoon. Highs in the mid 80s. Northeast winds 5 to 10 mph. Chance of precipitation 20 percent.

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

Linton, IN

Afternoon
Rain Showers
75°/ 58° 24°/ 14°
20%
Tuesday
Mostly Cloudy
72°/ 58° 22°/ 14°
0%
Wednesday
Cloudy
72°/ 55° 22°/ 13°
0%
Thursday
Cloudy
55°13°
0%
Friday
Cloudy
55°/ 52° 13°/ 11°
0%
Saturday
Cloudy
52°11°
0%
Sunday
Cloudy
52°11°
0%

Day: Mostly cloudy with a 20 percent chance of showers. Not as warm with highs in the mid 70s. Northeast winds 5 to 10 mph.

Night: Partly cloudy through the late overnight, then becoming mostly cloudy. Lows in the upper 50s. Northeast winds 5 to 10 mph.

Loogootee, IN

Afternoon
Thunderstorms
78°/ 58° 26°/ 14°
20%
Tuesday
Mostly Cloudy
75°/ 58° 24°/ 14°
0%
Wednesday
Cloudy
72°/ 58° 22°/ 14°
0%
Thursday
Cloudy
58°14°
0%
Friday
Cloudy
58°/ 50° 14°/ 10°
0%
Saturday
Cloudy
78°26°
0%
Sunday
Cloudy
78°26°
0%

Day: Mostly cloudy with a slight chance of showers and thunderstorms. Not as warm with highs in the upper 70s. North winds around 5 mph. Chance of rain 20 percent.

Night: Partly cloudy through the late overnight, then becoming mostly cloudy. Lows in the upper 50s. Northeast winds around 5 mph.

McLeansboro, IL

Today
Thunderstorms
85°/ 62° 29°/ 17°
20%
Tuesday
Partly Cloudy
78°/ 58° 26°/ 14°
0%
Wednesday
Sunny
78°/ 55° 26°/ 13°
0%
Thu Night
Clear
55°13°
0%
Friday
Cloudy
78°26°
0%
Sat Night
Cloudy
78°26°
0%
Sunday
Sunny
82°28°
0%

Day: Mostly cloudy this morning, then becoming partly sunny. A slight chance of showers and thunderstorms. Highs in the mid 80s. Northeast winds 5 to 10 mph. Chance of rain 20 percent.

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

Rockport, IN

Today
Mostly Cloudy
88°/ 62° 31°/ 17°
0%
Tuesday
Mostly Cloudy
78°/ 60° 26°/ 16°
0%
Wednesday
Partly Cloudy
75°/ 58° 24°/ 14°
0%
Thursday
Cloudy
58°14°
0%
Friday
Cloudy
58°/ 52° 14°/ 11°
0%
Saturday
Cloudy
78°26°
0%
Sunday
Cloudy
78°26°
0%

Day: Mostly cloudy this morning, then becoming partly sunny. Highs in the upper 80s. North winds 5 to 10 mph.

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

Henderson, KY

Today
Mostly Cloudy
88°/ 62° 31°/ 17°
0%
Tuesday
Mostly Cloudy
78°/ 58° 26°/ 14°
0%
Wednesday
Sunny
78°/ 58° 26°/ 14°
0%
Thu Night
Clear
55°13°
0%
Friday
Sunny
78°/ 52° 26°/ 11°
0%
Saturday
Cloudy
80°27°
0%
Sunday
Cloudy
80°27°
0%

Day: Mostly cloudy this morning, then becoming partly sunny. Highs in the upper 80s. North winds 5 to 10 mph.

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

Shawneetown, IL

Today
Mostly Cloudy
85°/ 62° 29°/ 17°
0%
Tuesday
Partly Cloudy
78°/ 58° 26°/ 14°
0%
Wednesday
Sunny
78°/ 55° 26°/ 13°
0%
Thu Night
Clear
55°13°
0%
Friday
Cloudy
78°26°
0%
Sat Night
Cloudy
78°26°
0%
Sunday
Sunny
82°28°
0%

Day: Mostly cloudy this morning, then becoming partly sunny. Highs in the mid 80s. North winds 5 to 10 mph.

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

Brazil, IN

Afternoon
Rain Showers
72°/ 58° 22°/ 14°
20%
Tuesday
Mostly Cloudy
72°/ 55° 22°/ 13°
0%
Wednesday
Cloudy
70°/ 58° 21°/ 14°
0%
Thursday
Cloudy
75°24°
0%
Friday
Cloudy
75°24°
0%
Saturday
Cloudy
75°24°
0%
Sunday
Cloudy
75°24°
0%

Day: Mostly cloudy with a 20 percent chance of showers. Not as warm with highs in the lower 70s. Northeast winds 5 to 10 mph. Gusts up to 20 mph late.

Night: Partly cloudy through the late overnight, then becoming mostly cloudy. Lows in the upper 50s. Northeast winds 5 to 10 mph.

Names listed above may include county names.

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