LACON, IL 61540 Weather Forecast & Current Conditions

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LACON/MARSHALL CNTY, IL
Current Weather

2:35 AM CST MAR 1, 2026
Overcast
25°F
Feels Like: 19°F
Dewpoint: 18°F
Rel. Hum.: 72%
Visibility: 10 miles
Wind: NNE at 5 mph
Pressure: 30.34 inches
Last 72 hours

Local Area Snow Depth

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LACON, IL 61540
Weather Forecast

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Snow Depth pages
REST OF TONIGHT
Mostly cloudy. Near steady temperature in the mid 20s. Northeast winds around 10 mph with gusts up to 20 mph.
SUNDAY
Mostly sunny in the morning, then becoming mostly cloudy. Highs in the upper 30s. Northeast winds around 10 mph with gusts up to 20 mph.
SUNDAY NIGHT
Mostly cloudy. Lows in the mid 20s. East winds 5 to 10 mph.
MONDAY
Partly sunny in the morning, then becoming mostly cloudy. Highs in the mid 40s. Southeast winds 5 to 10 mph with gusts up to 20 mph.
MONDAY NIGHT
Cloudy. Rain likely after midnight. Not as cool with lows in the mid 30s. Southeast winds 5 to 10 mph. Chance of rain 70 percent.
TUESDAY
Showers. Highs in the upper 40s. Chance of rain 90 percent.
TUESDAY NIGHT AND WEDNESDAY
Showers likely with a chance of thunderstorms. Lows in the lower 40s. Highs around 60. Chance of rain 70 percent.
WEDNESDAY NIGHT
Mostly cloudy with a chance of showers. Lows in the mid 40s. Chance of rain 50 percent.
THURSDAY
Mostly cloudy with a 50 percent chance of showers. Highs around 60.
THURSDAY NIGHT
Mostly cloudy with a chance of showers. A chance of thunderstorms after midnight. Lows in the upper 40s. Chance of rain 40 percent.
FRIDAY
Showers likely. Highs in the upper 60s. Chance of rain 70 percent.
FRIDAY NIGHT
Showers likely. Lows in the mid 40s. Chance of rain 70 percent.
SATURDAY
Cloudy with a 50 percent chance of showers. Highs in the upper 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 PM CST  2/28/2026
Sunday
1 MAR 2026
LACON, IL 61540 weather forecast Day 1, 0 hours 12 AM 24° 15° Partly Cloudy 0%

0% Thunder
( 0% severe)
NNE   8 72% 17°
Low 23° LACON, IL 61540 weather forecast Day 1, 3 hours 3 AM 24° 15° Mostly Cloudy NNE   8 72% 17°
High 39° LACON, IL 61540 weather forecast Day 1, 6 hours 6 AM 24° 15° Partly Cloudy 0%

0% Thunder
( 0% severe)
NNE   8 68% 16°

Mostly Cloudy



LACON, IL 61540 weather forecast Day 1, 9 hours 9 AM 29° 20° Partly Cloudy NE   9 55% 16°
LACON, IL 61540 weather forecast Day 1, 12 hours 12 PM 36° 29° Mostly Cloudy 4%

0% Thunder
( 0% severe)
ENE   9 37% 14°
LACON, IL 61540 weather forecast Day 1, 15 hours 3 PM 39° 33° Mostly Cloudy ENE   8 32% 13°
LACON, IL 61540 weather forecast Day 1, 18 hours 6 PM 33° 27° Mostly Cloudy 10%
SNOW
<.1 in
0% Thunder
( 0% severe)
E   7 38% 12°
LACON, IL 61540 weather forecast Day 1, 21 hours 9 PM 30° 23° Mostly Cloudy E   7 45% 13°
Monday
2 MAR 2026
LACON, IL 61540 weather forecast Day 2, 0 hours 12 AM 27° 20° Mostly Cloudy 18%
SNOW
<.1 in
0% Thunder
( 0% severe)
E   6 57% 15°
Low 24° LACON, IL 61540 weather forecast Day 2, 3 hours 3 AM 26° 19° Mostly Cloudy E   6 60% 15°
High 45° LACON, IL 61540 weather forecast Day 2, 6 hours 6 AM 26° 19° Mostly Cloudy 9%

0% Thunder
( 0% severe)
E   6 63% 16°

Mostly Cloudy



LACON, IL 61540 weather forecast Day 2, 9 hours 9 AM 33° 25° Mostly Cloudy ESE   9 59% 21°
LACON, IL 61540 weather forecast Day 2, 12 hours 12 PM 41° 35° Mostly Cloudy 7%

0% Thunder
( 0% severe)
ESE   10 47% 23°
LACON, IL 61540 weather forecast Day 2, 15 hours 3 PM 45° 40° Mostly Cloudy ESE   9 49% 27°
LACON, IL 61540 weather forecast Day 2, 18 hours 6 PM 40° 36° Mostly Cloudy 29%
RAIN
.01–.1 in
0% Thunder
( 0% severe)
ESE   6 64% 29°
LACON, IL 61540 weather forecast Day 2, 21 hours 9 PM 38° 34° Mostly Cloudy SE   5 76% 31°

LACON/MARSHALL CNTY, IL extended weather forecast

Tuesday
3 MAR 2026
Wednesday
4 MAR 2026
Thursday
5 MAR 2026
Friday
6 MAR 2026
Saturday
7 MAR 2026
Low 32° Low 43° Low 43° Low 46° Low 43°
High 47° High 58° High 56° High 62° High 55°
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
82% Rain
Overcast
87% Rain
Overcast
42% Rain
Overcast
61% Rain
Partly Cloudy
36% Rain
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