LACON, IL 61540 Weather Forecast & Current Conditions

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LACON/MARSHALL CNTY, IL
Current Weather

8:15 AM CDT SEP 17, 2025
Clear
61°F
Feels Like: 61°F
Dewpoint: 57°F
Rel. Hum.: 87%
Visibility: 10 miles
Wind: Calm
Pressure: 30.12 inches
Last 72 hours

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LACON, IL 61540
Weather Forecast

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Snow Depth pages
TODAY
Sunny. Highs in the upper 80s. Northeast winds around 5 mph.
TONIGHT
Mostly clear. Lows in the upper 50s. East winds around 5 mph.
THURSDAY
Sunny. Highs in the lower 90s. Southeast winds around 5 mph.
THURSDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 60s. East winds around 5 mph.
FRIDAY
Partly sunny. Highs in the upper 80s. East winds around 5 mph.
FRIDAY NIGHT
Mostly cloudy. A chance of showers in the evening. Lows in the lower 60s. Chance of rain 30 percent.
SATURDAY
Mostly sunny. Highs in the mid 80s.
SATURDAY NIGHT
Partly cloudy with a chance of showers. Lows in the lower 60s. Chance of rain 30 percent.
SUNDAY
Partly sunny with a chance of showers and thunderstorms. Highs in the mid 80s. Chance of rain 30 percent.
SUNDAY NIGHT
Mostly cloudy with a chance of showers. Lows in the lower 60s. Chance of rain 40 percent.
MONDAY
Mostly sunny with a chance of showers. Highs in the mid 80s. Chance of rain 40 percent.
MONDAY NIGHT
A chance of showers in the evening. Mostly cloudy. Lows in the lower 60s. Chance of rain 40 percent.
TUESDAY
Mostly sunny. Highs in the lower 80s.

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  9/16/2025
Wednesday
17 SEP 2025
LACON, IL 61540 weather forecast Day 1, 0 hours 1 AM 62° 63° Clear 0%

0% Thunder
( 1% severe)
  CALM 75% 54°
Low 56° LACON, IL 61540 weather forecast Day 1, 3 hours 4 AM 59° 60° Partly Cloudy   CALM 83% 54°
High 87° LACON, IL 61540 weather forecast Day 1, 6 hours 7 AM 57° 58° Partly Cloudy 0%

0% Thunder
( 1% severe)
  CALM 90% 54°

Partly Cloudy



LACON, IL 61540 weather forecast Day 1, 9 hours 10 AM 75° 75° Clear   CALM 54% 57°
LACON, IL 61540 weather forecast Day 1, 12 hours 1 PM 84° 83° Partly Cloudy 1%

0% Thunder
( 1% severe)
NE   2 36% 54°
LACON, IL 61540 weather forecast Day 1, 15 hours 4 PM 86° 84° Clear NE   3 32% 53°
LACON, IL 61540 weather forecast Day 1, 18 hours 7 PM 77° 79° Partly Cloudy 2%

0% Thunder
( 1% severe)
ENE   1 48% 56°
LACON, IL 61540 weather forecast Day 1, 21 hours 10 PM 68° 68° Partly Cloudy E   1 63% 55°
Thursday
18 SEP 2025
LACON, IL 61540 weather forecast Day 2, 0 hours 1 AM 63° 64° Clear 2%

0% Thunder
( 2% severe)
  CALM 75% 55°
Low 59° LACON, IL 61540 weather forecast Day 2, 3 hours 4 AM 60° 61° Clear   CALM 81% 54°
High 88° LACON, IL 61540 weather forecast Day 2, 6 hours 7 AM 59° 60° Partly Cloudy 0%

0% Thunder
( 2% severe)
  CALM 83% 54°

Partly Cloudy



LACON, IL 61540 weather forecast Day 2, 9 hours 10 AM 77° 79° Clear SSE   1 50% 57°
LACON, IL 61540 weather forecast Day 2, 12 hours 1 PM 86° 84° Partly Cloudy 2%

0% Thunder
( 7% severe)
SSE   2 34% 54°
LACON, IL 61540 weather forecast Day 2, 15 hours 4 PM 88° 86° Partly Cloudy ESE   2 30% 53°
LACON, IL 61540 weather forecast Day 2, 18 hours 7 PM 79° 80° Partly Cloudy 2%

0% Thunder
( 5% severe)
E   2 45% 56°
LACON, IL 61540 weather forecast Day 2, 21 hours 10 PM 70° 70° Partly Cloudy E   3 61% 56°

LACON/MARSHALL CNTY, IL extended weather forecast

Friday
19 SEP 2025
Saturday
20 SEP 2025
Sunday
21 SEP 2025
Monday
22 SEP 2025
Tuesday
23 SEP 2025
Low 58° Low 58° Low 59° Low 57° Low 59°
High 82° High 81° High 82° High 81° High 74°
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
Partly Cloudy
22% Rain
Overcast
48% Rain
Partly Cloudy
33% Rain
Partly Cloudy
27% Rain
Mostly Cloudy
51% Rain
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