LACON, IL 61540 Weather Forecast & Current Conditions
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  61540 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)
 CURRENT WEATHER

LACON/MARSHALL CNTY, IL
Current Weather
6:15 AM CDT APR 13, 2026
Overcast
64°F
Feels Like: 64°F
Dewpoint: 59°F
Rel. Hum.: 84%
Visibility: 10 miles
Wind: SSW at 8 mph
Pressure: 29.90 inches
Last 72 hours

Local Area Snow Depth

Illinois Current Weather

Illinois MOS Forecast Weather


Weather Map

(Automated weather data from NWS/FAA)
  61540 WEATHER FORECAST
10-Day model forecast maps
2025 Hurricanes

LACON, IL 61540
Weather Forecast

 Snowfall Forecast pages
Snow Depth pages
TODAY
Partly sunny this morning, then mostly cloudy with a slight chance of showers and thunderstorms this afternoon. Highs in the lower 80s. Southwest winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 20 percent.
TONIGHT
Mostly cloudy in the evening, then becoming partly cloudy. A chance of showers and thunderstorms. Lows in the mid 60s. South winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 50 percent.
TUESDAY
Mostly cloudy in the morning, then becoming partly sunny. A chance of showers and thunderstorms. Highs in the mid 80s. Southwest winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 50 percent.
TUESDAY NIGHT
Showers with thunderstorms likely in the evening, then showers likely with a chance of thunderstorms after midnight. Lows in the mid 60s. Southwest winds 10 to 15 mph. Gusts up to 30 mph in the evening. Chance of rain 80 percent.
WEDNESDAY
Showers. A chance of thunderstorms in the morning, then thunderstorms likely in the afternoon. Cooler with highs in the mid 70s. Southwest winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 90 percent.
WEDNESDAY NIGHT
Showers with a chance of thunderstorms in the evening, then a chance of showers after midnight. Lows around 60. Chance of rain 90 percent.
THURSDAY
Partly sunny with a chance of showers in the morning, then sunny in the afternoon. Highs in the upper 70s. Chance of rain 50 percent.
THURSDAY NIGHT
Mostly clear. Lows in the upper 50s.
FRIDAY
Mostly sunny. A chance of showers in the afternoon. Highs in the mid 80s. Chance of rain 40 percent.
FRIDAY NIGHT
Showers with a chance of thunderstorms. Lows in the mid 50s. Chance of rain 80 percent.
SATURDAY
Mostly cloudy in the morning, then becoming partly sunny. A chance of thunderstorms in the morning. A chance of showers. Much cooler with highs in the upper 60s. Chance of rain 50 percent.
SATURDAY NIGHT
Mostly cloudy in the evening, then becoming partly cloudy. Much cooler with lows in the upper 30s.
SUNDAY
Mostly sunny. Highs in the upper 50s.

  61540 WEATHER SATELLITE LOOPS
Visible Weather Satellite
LACON, IL 61540
Infrared Weather Satellite
LACON, IL 61540
  61540 WEATHER RADAR LOOP
NEXRAD Weather Radar
LACON, IL 61540
 MOS COMPUTER WEATHER FORECAST

LACON/MARSHALL CNTY, IL 3 hourly weather forecast
weather forecast created  7:00 PM CDT  4/12/2026
Monday
13 APR 2026		 LACON, IL 61540 weather forecast Day 1, 0 hours 1 AM 63° 62° Mostly Cloudy 21%
RAIN
.01–.1 in		 0% Thunder
( 19% severe)		 SW   12 81% 57°
Low 62° LACON, IL 61540 weather forecast Day 1, 3 hours 4 AM 63° 62° Mostly Cloudy SW   12 84% 58°
High 80° LACON, IL 61540 weather forecast Day 1, 6 hours 7 AM 64° 64° Mostly Cloudy 7%

 0% Thunder
( 18% severe)		 SW   9 84% 59°

Mostly Cloudy



 LACON, IL 61540 weather forecast Day 1, 9 hours 10 AM 68° 68° Mostly Cloudy SSW   10 78% 61°
LACON, IL 61540 weather forecast Day 1, 12 hours 1 PM 74° 74° Mostly Cloudy 19%
RAIN
<.01 in		 0% Thunder
( 28% severe)		 SSW   12 66% 62°
LACON, IL 61540 weather forecast Day 1, 15 hours 4 PM 77° 79° Mostly Cloudy SSW   13 58% 61°
LACON, IL 61540 weather forecast Day 1, 18 hours 7 PM 75° 75° Mostly Cloudy 24%
RAIN
<.01 in		 0% Thunder
( 21% severe)		 S   12 62% 61°
LACON, IL 61540 weather forecast Day 1, 21 hours 10 PM 71° 71° Mostly Cloudy SSW   13 68% 60°
Tuesday
14 APR 2026		 LACON, IL 61540 weather forecast Day 2, 0 hours 1 AM 69° 69° Partly Cloudy 32%
RAIN
.01–.1 in		 0% Thunder
( 31% severe)		 SSW   13 70% 59°
Low 65° LACON, IL 61540 weather forecast Day 2, 3 hours 4 AM 67° 67° Mostly Cloudy SSW   12 75% 59°
High 82° LACON, IL 61540 weather forecast Day 2, 6 hours 7 AM 67° 67° Mostly Cloudy 26%
RAIN
1–2 in		 0% Thunder
( 28% severe)		 SSW   12 78% 60°

Mostly Cloudy

Chance of Rain

 LACON, IL 61540 weather forecast Day 2, 9 hours 10 AM 72° 72° Mostly Cloudy SW   13 71% 62°
LACON, IL 61540 weather forecast Day 2, 12 hours 1 PM 78° 80° Mostly Cloudy 45%
RAIN
***		 0% Thunder
( 27% severe)		 SSW   14 58% 62°
LACON, IL 61540 weather forecast Day 2, 15 hours 4 PM 80° 81° Partly Cloudy SSW   15 54% 62°
LACON, IL 61540 weather forecast Day 2, 18 hours 7 PM 76° 78° Mostly Cloudy 59%
RAIN
***		 0% Thunder
( 42% severe)		 SSW   13 58% 60°
LACON, IL 61540 weather forecast Day 2, 21 hours 10 PM 71° 71° Mostly Cloudy SW   12 68% 60°

LACON/MARSHALL CNTY, IL extended weather forecast
Wednesday
15 APR 2026		 Thursday
16 APR 2026		 Friday
17 APR 2026		 Saturday
18 APR 2026		 Sunday
19 APR 2026
Low 62° Low 54° Low 52° Low 54° Low 35°
High 75° High 77° High 76° High 60° High 56°
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
77% Rain		 Mostly Cloudy
67% Rain		 Mostly Cloudy
34% Rain		 Overcast
61% Rain		 Partly Cloudy
22% Rain
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