LACON, IL 61540 Weather Forecast & Current Conditions

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LACON/MARSHALL CNTY, IL
Current Weather

8:35 AM CDT JUL 4, 2025
Clear
77°F
Feels Like: 79°F
Dewpoint: 68°F
Rel. Hum.: 74%
Visibility: 10 miles
Wind: Calm
Pressure: 30.08 inches
Last 72 hours

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LACON, IL 61540
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TODAY
Mostly sunny. Highs in the lower 90s. South winds 5 to 10 mph.
TONIGHT
Mostly clear. Lows in the lower 70s. South winds 5 to 10 mph.
SATURDAY
Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Southwest winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 20 percent.
SATURDAY NIGHT
Mostly cloudy with a chance of showers and thunderstorms. Lows in the lower 70s. Southwest winds 10 to 15 mph. Chance of rain 40 percent.
SUNDAY
Mostly cloudy with a chance of showers and thunderstorms. Humid with highs in the mid 80s. West winds 5 to 10 mph. Chance of rain 50 percent.
SUNDAY NIGHT
Mostly cloudy. Lows in the upper 60s.
MONDAY
Mostly sunny. Highs in the mid 80s.
MONDAY NIGHT
Mostly clear. Lows in the mid 60s.
TUESDAY
Mostly sunny. Highs in the upper 80s.
TUESDAY NIGHT
A chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Lows in the upper 60s. Chance of rain 40 percent.
WEDNESDAY AND WEDNESDAY NIGHT
Mostly cloudy with a chance of showers and thunderstorms. Highs in the upper 80s. Lows in the mid 60s. Chance of rain 50 percent.
THURSDAY
Partly sunny with a chance of showers. Highs in the mid 80s. Chance of rain 40 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  7:00 PM CDT  7/ 3/2025
Friday
4 JUL 2025
LACON, IL 61540 weather forecast Day 1, 0 hours 1 AM 72° 72° Partly Cloudy 3%

0% Thunder
( 3% severe)
  CALM 76% 64°
Low 69° LACON, IL 61540 weather forecast Day 1, 3 hours 4 AM 70° 70° Partly Cloudy   CALM 81% 64°
High 91° LACON, IL 61540 weather forecast Day 1, 6 hours 7 AM 73° 73° Partly Cloudy 2%

0% Thunder
( 3% severe)
S   1 79% 66°

Partly Cloudy



LACON, IL 61540 weather forecast Day 1, 9 hours 10 AM 84° 87° Partly Cloudy SSW   6 57% 67°
LACON, IL 61540 weather forecast Day 1, 12 hours 1 PM 89° 91° Clear 2%

0% Thunder
( 6% severe)
SSW   8 45% 65°
LACON, IL 61540 weather forecast Day 1, 15 hours 4 PM 91° 93° Clear S   7 42% 65°
LACON, IL 61540 weather forecast Day 1, 18 hours 7 PM 87° 89° Clear 1%

0% Thunder
( 4% severe)
S   6 50% 66°
LACON, IL 61540 weather forecast Day 1, 21 hours 10 PM 77° 79° Clear S   2 67% 65°
Saturday
5 JUL 2025
LACON, IL 61540 weather forecast Day 2, 0 hours 1 AM 73° 73° Clear 1%

0% Thunder
( 2% severe)
S   2 73% 64°
Low 70° LACON, IL 61540 weather forecast Day 2, 3 hours 4 AM 72° 72° Partly Cloudy S   5 76% 64°
High 91° LACON, IL 61540 weather forecast Day 2, 6 hours 7 AM 74° 74° Partly Cloudy 2%

0% Thunder
( 4% severe)
S   6 76% 66°

Partly Cloudy



LACON, IL 61540 weather forecast Day 2, 9 hours 10 AM 84° 87° Partly Cloudy SSW   9 59% 68°
LACON, IL 61540 weather forecast Day 2, 12 hours 1 PM 89° 92° Partly Cloudy 12%
RAIN
<.01 in
0% Thunder
( 20% severe)
SSW   12 47% 66°
LACON, IL 61540 weather forecast Day 2, 15 hours 4 PM 89° 92° Partly Cloudy SSW   12 47% 66°
LACON, IL 61540 weather forecast Day 2, 18 hours 7 PM 85° 88° Mostly Cloudy 15%
RAIN
.01–.1 in
0% Thunder
( 27% severe)
SSW   8 55% 67°
LACON, IL 61540 weather forecast Day 2, 21 hours 10 PM 78° 80° Mostly Cloudy SSW   6 71% 68°

LACON/MARSHALL CNTY, IL extended weather forecast

BAD DAY
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Low 69° Low 72° Low 67° Low 65° Low 66°
High 91° High 87° High 88° High 84° High 86°
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
32% Rain
Overcast
76% Rain
Partly Cloudy
24% Rain
Mostly Cloudy
51% Rain
Overcast
46% Rain
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