LACON, IL 61540 Weather Forecast & Current Conditions

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LACON/MARSHALL CNTY, IL
Current Weather

7:15 PM CST FEB 21, 2026
Scattered Clouds
27°F
Feels Like: 15°F
Dewpoint: 12°F
Rel. Hum.: 49%
Visibility: 10 miles
Wind: NW at 15 mph, gusts to 23
Pressure: 30.24 inches
Last 72 hours

Local Area Snow Depth

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LACON, IL 61540
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TONIGHT
Mostly cloudy. Scattered flurries after midnight. Lows around 17. Northwest winds 10 to 15 mph with gusts up to 30 mph.
SUNDAY
Mostly cloudy. Highs in the upper 20s. Northwest winds 15 to 20 mph with gusts up to 30 mph. Wind chill values as low as zero in the morning.
SUNDAY NIGHT
Mostly cloudy in the evening, then becoming partly cloudy. Lows around 14. Northwest winds 15 to 20 mph with gusts up to 30 mph. Wind chill values as low as 2 below.
MONDAY
Sunny. Highs in the lower 30s. Northwest winds 10 to 15 mph with gusts up to 25 mph. Wind chill values as low as 2 below in the morning.
MONDAY NIGHT
Mostly clear in the evening, then becoming mostly cloudy. Lows around 17. West winds around 5 mph, becoming southwest after midnight.
TUESDAY THROUGH WEDNESDAY
Mostly cloudy. Highs in the upper 40s. Lows in the lower 30s.
WEDNESDAY NIGHT
Mostly cloudy. A chance of rain in the evening, then a chance of snow after midnight. Lows in the mid 20s. Chance of precipitation 40 percent.
THURSDAY
Mostly sunny. A chance of rain and snow in the morning. Highs in the lower 40s. Chance of precipitation 30 percent.
THURSDAY NIGHT AND FRIDAY
Mostly clear. Lows in the mid 20s. Highs in the mid 50s.
FRIDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 30s.
SATURDAY
Partly sunny. Highs in the lower 50s.

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 AM CST  2/21/2026
Saturday
21 FEB 2026
LACON, IL 61540 weather forecast Day 1, 12 hours 12 PM 30° 22° Mostly Cloudy 2%

0% Thunder
( 0% severe)
WNW   9 50% 15°
High 34° LACON, IL 61540 weather forecast Day 1, 15 hours 3 PM 33° 25° Mostly Cloudy NW   10 44% 15°
Mostly Cloudy



LACON, IL 61540 weather forecast Day 1, 18 hours 6 PM 28° 19° Mostly Cloudy 1%

0% Thunder
( 0% severe)
WNW   9 49% 13°
LACON, IL 61540 weather forecast Day 1, 21 hours 9 PM 24° 13° Mostly Cloudy NW   12 59% 13°
Sunday
22 FEB 2026
LACON, IL 61540 weather forecast Day 2, 0 hours 12 AM 22° 10° Mostly Cloudy 14%
SNOW
<.1 in
0% Thunder
( 0% severe)
NW   12 55% 10°
Low 16° LACON, IL 61540 weather forecast Day 2, 3 hours 3 AM 19° Mostly Cloudy NW   13 58%
High 28° LACON, IL 61540 weather forecast Day 2, 6 hours 6 AM 18° Mostly Cloudy 2%

0% Thunder
( 0% severe)
NW   13 60%

Mostly Cloudy



LACON, IL 61540 weather forecast Day 2, 9 hours 9 AM 20° Mostly Cloudy NW   15 52%
LACON, IL 61540 weather forecast Day 2, 12 hours 12 PM 24° 11° Mostly Cloudy 1%

0% Thunder
( 0% severe)
NW   16 41%
LACON, IL 61540 weather forecast Day 2, 15 hours 3 PM 25° 12° Mostly Cloudy NW   16 39%
LACON, IL 61540 weather forecast Day 2, 18 hours 6 PM 22° Mostly Cloudy 0%

0% Thunder
( 0% severe)
NW   14 45%
LACON, IL 61540 weather forecast Day 2, 21 hours 9 PM 19° Mostly Cloudy NW   14 52%
Monday
23 FEB 2026
LACON, IL 61540 weather forecast Day 3, 0 hours 12 AM 17° Mostly Cloudy 0%

0% Thunder
( 0% severe)
NW   12 54%
Low 13° LACON, IL 61540 weather forecast Day 3, 3 hours 3 AM 16° Partly Cloudy NNW   13 54%
High 30° LACON, IL 61540 weather forecast Day 3, 6 hours 6 AM 15° Partly Cloudy 0%

0% Thunder
( 0% severe)
NNW   12 57%

Partly Cloudy



LACON, IL 61540 weather forecast Day 3, 9 hours 9 AM 19° Partly Cloudy NNW   13 49%
LACON, IL 61540 weather forecast Day 3, 15 hours 12 PM 26° 15° Clear 0%

0% Thunder
( 0% severe)
NNW   12 36%
LACON, IL 61540 weather forecast Day 3, 18 hours 3 PM 29° 20° Partly Cloudy NW   9 30%
LACON, IL 61540 weather forecast Day 3, 21 hours 6 PM 24° 20° Partly Cloudy     NW   3 39%

LACON/MARSHALL CNTY, IL extended weather forecast

Tuesday
24 FEB 2026
Wednesday
25 FEB 2026
Thursday
26 FEB 2026
Friday
27 FEB 2026
Saturday
28 FEB 2026
Low 15° Low 29° Low 20° Low 25° Low 32°
High 46° High 40° High 35° High 44° High 46°
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 <!--SEARCHED_TOWN_NAME--> weather forecast Day 8
Partly Cloudy
5% Snow
Mostly Cloudy
12% Rain/Snow
Mostly Cloudy
24% Snow
Partly Cloudy
19% Rain/Snow
Partly Cloudy
33% Rain
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