LACON, IL 61540 Weather Forecast & Current Conditions

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LACON/MARSHALL CNTY, IL
Current Weather

4:15 AM CST JAN 16, 2026
Overcast
27°F
Feels Like: 18°F
Dewpoint: 21°F
Rel. Hum.: 76%
Visibility: 10 miles
Wind: SSW at 9 mph
Pressure: 29.59 inches
Last 72 hours

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LACON, IL 61540
Weather Forecast

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Snow Depth pages
TODAY
Cloudy with a 40 percent chance of snow showers. Little or no snow accumulation. Not as cool with highs in the upper 30s. West winds 10 to 15 mph with gusts up to 30 mph.
TONIGHT
Mostly cloudy with a chance of snow showers in the evening, then partly cloudy after midnight. Little or no snow accumulation. Lows around 14. West winds 10 to 15 mph with gusts up to 25 mph. Chance of snow 40 percent.
SATURDAY
Mostly sunny in the morning, then becoming mostly cloudy. A chance of flurries. Much cooler with highs around 19. West winds 15 to 20 mph with gusts up to 30 mph. Wind chill values as low as 2 below.
SATURDAY NIGHT
Mostly cloudy with a chance of flurries in the evening, then partly cloudy after midnight. Lows around 8 above. West winds 10 to 15 mph with gusts up to 25 mph. Wind chill values as low as 5 below.
SUNDAY
Mostly sunny in the morning, then becoming mostly cloudy. Highs in the lower 20s. Southwest winds 15 to 20 mph. Wind chill values as low as 5 below.
SUNDAY NIGHT AND MARTIN LUTHER KING JR DAY
Partly cloudy and brisk. Lows zero to 5 above zero. Highs around 10 above. Wind chill values as low as 20 below.
MONDAY NIGHT
Mostly clear. Cold with lows around 5 above. Wind chill values as low as 10 below.
TUESDAY
Mostly sunny. Not as cool with highs in the mid 20s. Wind chill values as low as 10 below in the morning.
TUESDAY NIGHT THROUGH WEDNESDAY NIGHT
Mostly cloudy. Lows around 20. Highs in the mid 30s.
THURSDAY
Mostly sunny. Highs in the upper 20s.

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  6:00 PM CST  1/15/2026
Friday
16 JAN 2026
LACON, IL 61540 weather forecast Day 1, 0 hours 12 AM 25° 15° Mostly Cloudy 37%
SNOW
5–10 in
0% Thunder
( 1% severe)
SSW   10 72% 18°
Low 24° LACON, IL 61540 weather forecast Day 1, 3 hours 3 AM 27° 17° Mostly Cloudy SSW   10 66% 18°
High 38° LACON, IL 61540 weather forecast Day 1, 6 hours 6 AM 28° 19° Mostly Cloudy 13%
SNOW
<.1 in
0% Thunder
( 0% severe)
SW   9 76% 22°

Mostly Cloudy



LACON, IL 61540 weather forecast Day 1, 9 hours 9 AM 32° 23° Mostly Cloudy WSW   12 78% 26°
LACON, IL 61540 weather forecast Day 1, 12 hours 12 PM 36° 27° Mostly Cloudy 13%
RAIN/SNOW
<.05 in
0% Thunder
( 3% severe)
W   14 66% 26°
LACON, IL 61540 weather forecast Day 1, 15 hours 3 PM 36° 28° Mostly Cloudy W   13 60% 24°
LACON, IL 61540 weather forecast Day 1, 18 hours 6 PM 30° 22° Mostly Cloudy 20%
SNOW
<.1 in
0% Thunder
( 0% severe)
W   9 67% 21°
LACON, IL 61540 weather forecast Day 1, 21 hours 9 PM 26° 16° Partly Cloudy WNW   10 66% 17°
Saturday
17 JAN 2026
LACON, IL 61540 weather forecast Day 2, 0 hours 12 AM 22° 12° Partly Cloudy 5%

0% Thunder
( 0% severe)
WNW   9 58% 11°
Low 14° LACON, IL 61540 weather forecast Day 2, 3 hours 3 AM 18° Partly Cloudy WNW   10 57%
High 18° LACON, IL 61540 weather forecast Day 2, 6 hours 6 AM 16° Partly Cloudy 2%

0% Thunder
( 2% severe)
W   10 54%

Mostly Cloudy



LACON, IL 61540 weather forecast Day 2, 9 hours 9 AM 17° Mostly Cloudy W   12 51%
LACON, IL 61540 weather forecast Day 2, 12 hours 12 PM 18° Mostly Cloudy 5%

0% Thunder
( 2% severe)
W   14 46%
LACON, IL 61540 weather forecast Day 2, 15 hours 3 PM 18° Mostly Cloudy W   14 46%
LACON, IL 61540 weather forecast Day 2, 18 hours 6 PM 15° Mostly Cloudy 1%

0% Thunder
( 0% severe)
W   12 57%
LACON, IL 61540 weather forecast Day 2, 21 hours 9 PM 14° Mostly Cloudy W   10 60%

LACON/MARSHALL CNTY, IL extended weather forecast

BAD DAY
BAD DATE
BAD DAY
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Low 12° Low 7° Low 6° Low 6° Low 13°
High 23° High 23° High 14° High 24° High 33°
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
20% Snow
Partly Cloudy
12% Snow
Partly Cloudy
11% Snow
Clear
8% Snow
Partly Cloudy
14% Snow
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