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
11:55 AM CDT MAY 13, 2026
Broken Clouds
63°F
Feels Like: 62°F
Dewpoint: 39°F
Rel. Hum.: 41%
Visibility: 10 miles
Wind: NNW at 9 mph, gusts to 21
Pressure: 30.04 inches
Last 72 hours

Local Area Snow Depth

Illinois Current Weather

Illinois MOS Forecast Weather


Regional Weather Maps

(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
THIS AFTERNOON
Mostly sunny. Much cooler with highs in the upper 60s. Northwest winds 15 to 20 mph with gusts up to 30 mph.
TONIGHT
Clear. Lows in the lower 40s. North winds 10 to 15 mph with gusts up to 25 mph, becoming northwest around 5 mph after midnight.
THURSDAY
Sunny. Highs in the lower 70s. South winds around 5 mph.
THURSDAY NIGHT
Partly cloudy in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Not as cool with lows in the lower 50s. South winds 10 to 15 mph. Chance of rain 50 percent.
FRIDAY
Mostly cloudy with a chance of showers and thunderstorms in the morning, then mostly sunny in the afternoon. Highs around 80. South winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 50 percent.
FRIDAY NIGHT
Partly cloudy with a chance of showers and thunderstorms. Lows around 60. Chance of rain 30 percent.
SATURDAY
Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 50 percent.
SATURDAY NIGHT
Showers likely with a chance of thunderstorms in the evening, then mostly cloudy with a chance of showers after midnight. Lows in the lower 60s. Chance of rain 60 percent.
SUNDAY
Partly sunny with a chance of showers. A chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 50 percent.
SUNDAY NIGHT
Partly cloudy with a chance of showers and thunderstorms. Lows in the upper 60s. Chance of rain 40 percent.
MONDAY
Mostly sunny with a chance of thunderstorms. A chance of showers in the morning, then showers likely in the afternoon. Breezy with highs in the lower 90s. Chance of rain 60 percent.
MONDAY NIGHT
Showers likely with a chance of thunderstorms in the evening, then showers likely after midnight. Lows in the mid 60s. Chance of rain 70 percent.
TUESDAY
Showers likely. Cooler with highs in the upper 70s. Chance of rain 70 percent.

  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 AM CDT  5/13/2026
Wednesday
13 MAY 2026		 LACON, IL 61540 weather forecast Day 1, 12 hours 1 PM 65° 65° Partly Cloudy 0%

 0% Thunder
( 1% severe)		 NNW   14 38% 39°
High 68° LACON, IL 61540 weather forecast Day 1, 15 hours 4 PM 67° 67° Clear NNW   14 33% 37°
Clear



 LACON, IL 61540 weather forecast Day 1, 18 hours 7 PM 65° 65° Clear 0%

 0% Thunder
( 1% severe)		 N   10 34% 36°
LACON, IL 61540 weather forecast Day 1, 21 hours 10 PM 55° 55° Clear   CALM 51% 37°
Thursday
14 MAY 2026		 LACON, IL 61540 weather forecast Day 2, 0 hours 1 AM 49° 49° Clear 0%

 0% Thunder
( 0% severe)		   CALM 61% 36°
Low 43° LACON, IL 61540 weather forecast Day 2, 3 hours 4 AM 45° 44° Clear   CALM 71% 36°
High 72° LACON, IL 61540 weather forecast Day 2, 6 hours 7 AM 46° 45° Clear 0%

 0% Thunder
( 1% severe)		   CALM 71% 37°

Clear



 LACON, IL 61540 weather forecast Day 2, 9 hours 10 AM 60° 61° Clear   CALM 42% 37°
LACON, IL 61540 weather forecast Day 2, 12 hours 1 PM 68° 68° Clear 0%

 0% Thunder
( 1% severe)		   CALM 29% 35°
LACON, IL 61540 weather forecast Day 2, 15 hours 4 PM 72° 72° Clear S   3 25% 34°
LACON, IL 61540 weather forecast Day 2, 18 hours 7 PM 70° 70° Partly Cloudy 2%

 0% Thunder
( 10% severe)		 SSE   6 29% 36°
LACON, IL 61540 weather forecast Day 2, 21 hours 10 PM 59° 58° Partly Cloudy SE   6 42% 36°
Friday
15 MAY 2026		 LACON, IL 61540 weather forecast Day 3, 0 hours 1 AM 57° 55° Mostly Cloudy 48%
RAIN
***		 0% Thunder
( 14% severe)		 SSE   8 47% 37°
Low 53° LACON, IL 61540 weather forecast Day 3, 3 hours 4 AM 56° 53° Mostly Cloudy SSE   10 53% 39°
High 80° LACON, IL 61540 weather forecast Day 3, 6 hours 7 AM 56° 53° Mostly Cloudy 36%
RAIN
.01–.1 in		 0% Thunder
( 8% severe)		 S   12 66% 45°

Mostly Cloudy

Chance of Rain

 LACON, IL 61540 weather forecast Day 3, 9 hours 10 AM 63° 61° Mostly Cloudy S   14 58% 48°
LACON, IL 61540 weather forecast Day 3, 15 hours 1 PM 72° 72° Partly Cloudy 4%

 0% Thunder
( 14% severe)		 S   14 48% 51°
LACON, IL 61540 weather forecast Day 3, 18 hours 4 PM 78° 79° Partly Cloudy S   12 42% 53°
LACON, IL 61540 weather forecast Day 3, 21 hours 7 PM 77° 78° Partly Cloudy     S   9 45% 54°

LACON/MARSHALL CNTY, IL extended weather forecast
Saturday
16 MAY 2026		 Sunday
17 MAY 2026		 Monday
18 MAY 2026		 Tuesday
19 MAY 2026		 Wednesday
20 MAY 2026
Low 60° Low 60° Low 65° Low 63° Low 53°
High 79° High 81° High 83° High 72° High 71°
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 <!--SEARCHED_TOWN_NAME--> weather forecast Day 8
Overcast
64% Rain		 Mostly Cloudy
55% Rain		 Partly Cloudy
35% Rain		 Overcast
47% Rain		 Overcast
34% Rain
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