LACON, IL 61540 Weather Forecast & Current Conditions

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LACON/MARSHALL CNTY, IL
Current Weather

3:35 AM CDT APR 22, 2026
Clear
64°F
Feels Like: 63°F
Dewpoint: 55°F
Rel. Hum.: 73%
Visibility: 10 miles
Wind: SW at 12 mph, gusts to 17
Pressure: 29.93 inches
Last 72 hours

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LACON, IL 61540
Weather Forecast

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TODAY
Mostly sunny. Highs in the upper 70s. Southwest winds 10 to 15 mph.
TONIGHT
Mostly clear. Lows in the upper 50s. Southwest winds 5 to 10 mph.
THURSDAY
Mostly sunny. Highs in the lower 80s. South winds 15 to 20 mph with gusts up to 30 mph.
THURSDAY NIGHT
Partly cloudy in the evening, then mostly cloudy with showers likely with a chance of thunderstorms after midnight. Lows in the lower 60s. South winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 60 percent.
FRIDAY
Showers likely in the morning, then partly sunny with a chance of showers and thunderstorms in the afternoon. Highs in the mid 70s. Southwest winds 10 to 15 mph, becoming west in the afternoon. Chance of rain 70 percent.
FRIDAY NIGHT AND SATURDAY
Mostly clear. Lows in the lower 50s. Highs in the lower 70s.
SATURDAY NIGHT
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the upper 40s.
SUNDAY
Mostly sunny. Highs in the mid 70s.
SUNDAY NIGHT
Mostly cloudy. A chance of showers in the evening, then showers likely after midnight. Breezy with lows in the mid 50s. Chance of rain 60 percent.
MONDAY
Showers likely. A chance of thunderstorms in the afternoon. Breezy with highs in the mid 70s. Chance of rain 70 percent.
MONDAY NIGHT
Mostly cloudy. A chance of showers and thunderstorms in the evening. Lows in the upper 40s. Chance of rain 50 percent.
TUESDAY
Mostly sunny. Highs in the mid 60s.

Visible Weather Satellite
LACON, IL 61540
Infrared Weather Satellite
LACON, IL 61540
NEXRAD Weather Radar
LACON, IL 61540

LACON/MARSHALL CNTY, IL 3 hourly weather forecast

weather forecast created  7:00 PM CDT  4/21/2026
Wednesday
22 APR 2026
LACON, IL 61540 weather forecast Day 1, 0 hours 1 AM 62° 62° Clear 4%

0% Thunder
( 12% severe)
SW   7 72% 53°
Low 59° LACON, IL 61540 weather forecast Day 1, 3 hours 4 AM 60° 59° Partly Cloudy SW   7 81% 54°
High 78° LACON, IL 61540 weather forecast Day 1, 6 hours 7 AM 60° 60° Partly Cloudy 2%

0% Thunder
( 12% severe)
SW   6 81% 54°

Partly Cloudy



LACON, IL 61540 weather forecast Day 1, 9 hours 10 AM 67° 67° Partly Cloudy WSW   7 68% 56°
LACON, IL 61540 weather forecast Day 1, 12 hours 1 PM 74° 74° Mostly Cloudy 4%

0% Thunder
( 22% severe)
WSW   7 55% 57°
LACON, IL 61540 weather forecast Day 1, 15 hours 4 PM 77° 79° Partly Cloudy SW   7 48% 56°
LACON, IL 61540 weather forecast Day 1, 18 hours 7 PM 73° 73° Partly Cloudy 2%

0% Thunder
( 6% severe)
SSW   5 53% 55°
LACON, IL 61540 weather forecast Day 1, 21 hours 10 PM 66° 66° Partly Cloudy S   3 68% 55°
Thursday
23 APR 2026
LACON, IL 61540 weather forecast Day 2, 0 hours 1 AM 62° 62° Clear 1%

0% Thunder
( 1% severe)
S   5 72% 53°
Low 58° LACON, IL 61540 weather forecast Day 2, 3 hours 4 AM 59° 59° Clear S   5 80% 53°
High 81° LACON, IL 61540 weather forecast Day 2, 6 hours 7 AM 60° 59° Partly Cloudy 1%

0% Thunder
( 1% severe)
S   7 78% 53°

Partly Cloudy



LACON, IL 61540 weather forecast Day 2, 9 hours 10 AM 71° 71° Partly Cloudy S   12 55% 54°
LACON, IL 61540 weather forecast Day 2, 12 hours 1 PM 78° 79° Partly Cloudy 1%

0% Thunder
( 9% severe)
S   14 40% 52°
LACON, IL 61540 weather forecast Day 2, 15 hours 4 PM 80° 80° Partly Cloudy S   15 36% 51°
LACON, IL 61540 weather forecast Day 2, 18 hours 7 PM 75° 75° Partly Cloudy 15%
RAIN
<.01 in
0% Thunder
( 14% severe)
S   13 43% 51°
LACON, IL 61540 weather forecast Day 2, 21 hours 10 PM 69° 69° Partly Cloudy S   13 57% 53°

LACON/MARSHALL CNTY, IL extended weather forecast

Friday
24 APR 2026
Saturday
25 APR 2026
Sunday
26 APR 2026
Monday
27 APR 2026
Tuesday
28 APR 2026
Low 61° Low 43° Low 43° Low 46° Low 49°
High 72° High 66° High 69° High 62° High 68°
LACON, IL 61540 weather forecast Day 3 LACON, IL 61540 weather forecast Day 4 LACON, IL 61540 weather forecast Day 5 LACON, IL 61540 weather forecast Day 6 LACON, IL 61540 weather forecast Day 7
Overcast
70% Rain
Clear
11% Rain
Partly Cloudy
16% Rain
Overcast
64% Rain
Overcast
55% Rain
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