LACON, IL 61540 Weather Forecast & Current Conditions

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LACON/MARSHALL CNTY, IL
Current Weather

6:55 AM CDT MAY 2, 2026
Broken Clouds
37°F
Feels Like: 37°F
Dewpoint: 32°F
Rel. Hum.: 82%
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
Patchy frost this morning. Mostly sunny. Highs in the upper 50s. North winds 5 to 10 mph.
TONIGHT
Mostly clear. Lows in the lower 40s. Southwest winds 5 to 10 mph.
SUNDAY
Mostly cloudy with a slight chance of showers in the morning, then partly sunny in the afternoon. Not as cool with highs in the upper 60s. Southwest winds 15 to 20 mph with gusts up to 35 mph. Chance of rain 20 percent.
SUNDAY NIGHT
Partly cloudy in the evening, then becoming mostly clear. Lows in the mid 40s. West winds 10 to 15 mph, becoming southwest around 5 mph after midnight.
MONDAY
Sunny. Highs in the upper 70s. Southwest winds 10 to 15 mph with gusts up to 25 mph.
MONDAY NIGHT
Partly cloudy in the evening, then becoming mostly cloudy. A chance of thunderstorms in the evening. A chance of showers. Lows around 50. Chance of rain 50 percent.
TUESDAY
Mostly cloudy. A chance of showers in the morning, then showers likely in the afternoon. Much cooler with highs in the upper 50s. Chance of rain 70 percent.
TUESDAY NIGHT
Mostly cloudy. A chance of showers in the evening. Lows in the lower 40s. Chance of rain 50 percent.
WEDNESDAY
Partly sunny in the morning, then becoming mostly cloudy. Highs in the upper 50s.
WEDNESDAY NIGHT
Mostly cloudy. A chance of showers in the evening. Lows in the lower 40s. Chance of rain 30 percent.
THURSDAY
Partly sunny. Highs around 60.
THURSDAY NIGHT AND FRIDAY
Partly cloudy. Lows in the lower 40s. 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  5/ 1/2026
Saturday
2 MAY 2026
LACON, IL 61540 weather forecast Day 1, 0 hours 1 AM 40° 38° Partly Cloudy 0%

0% Thunder
( 1% severe)
E   1 76% 33°
Low 36° LACON, IL 61540 weather forecast Day 1, 3 hours 4 AM 37° 35° Partly Cloudy   CALM 79% 31°
High 58° LACON, IL 61540 weather forecast Day 1, 6 hours 7 AM 38° 36° Partly Cloudy 0%

0% Thunder
( 0% severe)
  CALM 76% 31°

Partly Cloudy



LACON, IL 61540 weather forecast Day 1, 9 hours 10 AM 50° 49° Clear N   3 46% 30°
LACON, IL 61540 weather forecast Day 1, 12 hours 1 PM 55° 53° Partly Cloudy 0%

0% Thunder
( 1% severe)
NNW   7 31% 25°
LACON, IL 61540 weather forecast Day 1, 15 hours 4 PM 57° 56° Partly Cloudy NW   7 29% 25°
LACON, IL 61540 weather forecast Day 1, 18 hours 7 PM 55° 55° Clear 0%

0% Thunder
( 1% severe)
WNW   3 32% 26°
LACON, IL 61540 weather forecast Day 1, 21 hours 10 PM 46° 45° Clear SSW   2 51% 29°
Sunday
3 MAY 2026
LACON, IL 61540 weather forecast Day 2, 0 hours 1 AM 42° 38° Partly Cloudy 8%

0% Thunder
( 1% severe)
SSW   6 60% 29°
Low 40° LACON, IL 61540 weather forecast Day 2, 3 hours 4 AM 42° 37° Partly Cloudy SSW   8 62% 30°
High 69° LACON, IL 61540 weather forecast Day 2, 6 hours 7 AM 45° 40° Mostly Cloudy 12%
RAIN
<.01 in
0% Thunder
( 5% severe)
SSW   10 60% 32°

Mostly Cloudy



LACON, IL 61540 weather forecast Day 2, 9 hours 10 AM 53° 49° Mostly Cloudy SSW   13 52% 36°
LACON, IL 61540 weather forecast Day 2, 12 hours 1 PM 62° 60° Mostly Cloudy 5%

0% Thunder
( 10% severe)
SSW   15 44% 40°
LACON, IL 61540 weather forecast Day 2, 15 hours 4 PM 67° 67° Mostly Cloudy WSW   13 40% 42°
LACON, IL 61540 weather forecast Day 2, 18 hours 7 PM 65° 65° Partly Cloudy 10%
RAIN
<.01 in
0% Thunder
( 5% severe)
W   8 45% 43°
LACON, IL 61540 weather forecast Day 2, 21 hours 10 PM 55° 55° Partly Cloudy W   3 64% 43°

LACON/MARSHALL CNTY, IL extended weather forecast

Monday
4 MAY 2026
Tuesday
5 MAY 2026
Wednesday
6 MAY 2026
Thursday
7 MAY 2026
Friday
8 MAY 2026
Low 48° Low 50° Low 40° Low 39° Low 44°
High 75° High 53° High 56° High 61° High 66°
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
11% Rain
Overcast
85% Rain
Overcast
62% Rain
Overcast
50% Rain
Partly Cloudy
25% Rain
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