LACON, IL 61540 Weather Forecast & Current Conditions

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LACON/MARSHALL CNTY, IL
Current Weather

10:15 PM CDT MAR 26, 2026
Overcast
Thunder Rain
46°F
Feels Like: 41°F
Dewpoint: 45°F
Rel. Hum.: 96%
Visibility: 7 miles
Wind: NNE at 10 mph, gusts to 17
Pressure: 30.03 inches
Last 72 hours

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LACON, IL 61540
Weather Forecast

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REST OF TONIGHT
Mostly cloudy. Rain likely with a slight chance of thunderstorms late this evening, then a chance of rain. Much cooler with lows around 30. Northeast winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 70 percent.
FRIDAY
Partly sunny in the morning, then clearing. Much cooler with highs in the upper 40s. North winds 15 to 20 mph.
FRIDAY NIGHT
Clear. Lows in the mid 20s. Northwest winds 10 to 15 mph with gusts up to 25 mph.
SATURDAY
Sunny. Highs in the lower 50s. West winds around 5 mph, increasing to south 10 to 15 mph in the afternoon.
SATURDAY NIGHT
Partly cloudy in the evening, then becoming mostly cloudy. Not as cool with lows in the lower 40s. South winds 10 to 15 mph with gusts up to 25 mph.
SUNDAY
Partly sunny. Not as cool with highs in the lower 60s.
SUNDAY NIGHT AND MONDAY
Partly cloudy. Lows in the lower 50s. Highs in the upper 70s.
MONDAY NIGHT AND TUESDAY
Mostly cloudy. A chance of rain and thunderstorms. Breezy. Lows in the lower 60s. Highs in the lower 80s. Chance of rain 50 percent.
TUESDAY NIGHT
Rain likely with a chance of thunderstorms. Lows in the mid 50s. Chance of rain 60 percent.
WEDNESDAY
Mostly cloudy with a chance of rain. A chance of thunderstorms in the afternoon. Cooler with highs in the lower 70s. Chance of rain 50 percent.
WEDNESDAY NIGHT
Rain likely with a chance of thunderstorms. Cooler with lows in the lower 40s. Chance of rain 60 percent.
THURSDAY
Mostly cloudy. A chance of rain. Much cooler with highs in the mid 50s. Chance of rain 50 percent.

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  3/26/2026
Friday
27 MAR 2026
LACON, IL 61540 weather forecast Day 1, 0 hours 12 AM 38° 30° Mostly Cloudy 18%
RAIN
.01–.1 in
0% Thunder
( 1% severe)
NE   14 76% 31°
Low 31° LACON, IL 61540 weather forecast Day 1, 3 hours 3 AM 33° 24° Mostly Cloudy NNE   13 71% 25°
High 48° LACON, IL 61540 weather forecast Day 1, 6 hours 6 AM 32° 23° Mostly Cloudy 1%

0% Thunder
( 0% severe)
N   12 68% 23°

Partly Cloudy



LACON, IL 61540 weather forecast Day 1, 9 hours 9 AM 35° 27° Partly Cloudy N   12 63% 24°
LACON, IL 61540 weather forecast Day 1, 12 hours 12 PM 42° 36° Partly Cloudy 0%

0% Thunder
( 0% severe)
NNW   12 46% 23°
LACON, IL 61540 weather forecast Day 1, 15 hours 3 PM 46° 40° Partly Cloudy NNW   13 36% 21°
LACON, IL 61540 weather forecast Day 1, 18 hours 6 PM 41° 35° Clear 0%

0% Thunder
( 0% severe)
NW   10 43% 21°
LACON, IL 61540 weather forecast Day 1, 21 hours 9 PM 36° 30° Clear NW   8 50% 20°
Saturday
28 MAR 2026
LACON, IL 61540 weather forecast Day 2, 0 hours 12 AM 31° 25° Clear 0%

0% Thunder
( 0% severe)
NNW   6 53% 17°
Low 25° LACON, IL 61540 weather forecast Day 2, 3 hours 3 AM 27° 24° Clear N   2 57% 15°
High 51° LACON, IL 61540 weather forecast Day 2, 6 hours 6 AM 26° 23° Clear 0%

0% Thunder
( 0% severe)
  CALM 60% 15°

Clear



LACON, IL 61540 weather forecast Day 2, 9 hours 9 AM 36° 34° Clear SSE   2 39% 15°
LACON, IL 61540 weather forecast Day 2, 12 hours 12 PM 45° 41° Clear 0%

0% Thunder
( 0% severe)
S   8 31% 17°
LACON, IL 61540 weather forecast Day 2, 15 hours 3 PM 51° 47° Partly Cloudy SSW   10 27% 19°
LACON, IL 61540 weather forecast Day 2, 18 hours 6 PM 46° 41° Partly Cloudy 0%

0% Thunder
( 0% severe)
S   9 37% 22°
LACON, IL 61540 weather forecast Day 2, 21 hours 9 PM 43° 38° Mostly Cloudy S   9 48% 25°

LACON/MARSHALL CNTY, IL extended weather forecast

BAD DAY
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Low 27° Low 37° Low 52° Low 57° Low 52°
High 53° High 63° High 74° High 74° High 63°
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
Clear
1% Rain/Snow
Partly Cloudy
5% Rain
Partly Cloudy
30% Rain
Overcast
61% Rain
Overcast
66% Rain
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