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
8:15 PM CST MAR 4, 2026
Overcast
Mist
43°F
Feels Like: 42°F
Dewpoint: 41°F
Rel. Hum.: 93%
Visibility: 3 miles
Wind: E at 3 mph
Pressure: 30.00 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
TONIGHT
A chance of showers with a slight chance of thunderstorms this evening, then showers likely with a chance of thunderstorms after midnight. Patchy fog this evening, then areas of fog after midnight. Near steady temperature in the lower 40s. Northeast winds around 5 mph. Chance of rain 70 percent.
THURSDAY
Mostly cloudy. A chance of showers in the morning. Areas of fog in the morning. Highs in the upper 50s. North winds around 5 mph. Chance of rain 50 percent.
THURSDAY NIGHT
Mostly cloudy. A chance of showers and thunderstorms after midnight. Patchy fog after midnight. Lows in the mid 40s. Temperature rising into the upper 40s after midnight. Southeast winds 5 to 10 mph. Chance of rain 50 percent.
FRIDAY
Mostly cloudy. Patchy fog in the morning. Showers likely with a chance of thunderstorms in the morning, then a chance of showers in the afternoon. Not as cool with highs in the mid 70s. South winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 70 percent.
FRIDAY NIGHT
A chance of thunderstorms. Showers. Lows around 50. Southwest winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 90 percent.
SATURDAY
Mostly cloudy with a chance of showers in the morning, then partly sunny in the afternoon. Much cooler with highs around 60. Chance of rain 30 percent.
SATURDAY NIGHT AND SUNDAY
Mostly clear. Lows in the mid 30s. Highs in the lower 60s.
SUNDAY NIGHT AND MONDAY
Mostly clear. Lows in the mid 40s. Highs in the lower 70s.
MONDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. A chance of rain after midnight. Not as cool with lows in the mid 50s. Chance of rain 40 percent.
TUESDAY
Rain. Highs in the lower 70s. Chance of rain 80 percent.
TUESDAY NIGHT
Rain. Much cooler with lows in the upper 30s. Chance of rain 80 percent.
WEDNESDAY
Mostly cloudy in the morning, then becoming partly sunny. A chance of rain. A chance of snow in the afternoon. Much cooler with highs in the upper 40s. Chance of precipitation 50 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  6:00 AM CST  3/ 4/2026
Wednesday
4 MAR 2026		 LACON, IL 61540 weather forecast Day 1, 12 hours 12 PM 46° 42° Mostly Cloudy 30%
RAIN
<.01 in		 0% Thunder
( 5% severe)		 E   7 71% 37°
High 49° LACON, IL 61540 weather forecast Day 1, 15 hours 3 PM 48° 47° Mostly Cloudy E   3 71% 39°
Mostly Cloudy

Chance of Rain

 LACON, IL 61540 weather forecast Day 1, 18 hours 6 PM 47° 46° Mostly Cloudy 34%
RAIN
.01–.1 in		 0% Thunder
( 6% severe)		 ENE   1 76% 40°
LACON, IL 61540 weather forecast Day 1, 21 hours 9 PM 44° 43° Mostly Cloudy E   2 89% 41°
Thursday
5 MAR 2026		 LACON, IL 61540 weather forecast Day 2, 0 hours 12 AM 44° 43° Mostly Cloudy 82%
RAIN
>2 in		 0% Thunder
( 17% severe)		 ENE   2 89% 41°
Low 41° LACON, IL 61540 weather forecast Day 2, 3 hours 3 AM 43° 42° Mostly Cloudy ENE   1 93% 41°
High 57° LACON, IL 61540 weather forecast Day 2, 6 hours 6 AM 43° 42° Mostly Cloudy 72%
RAIN
***		 0% Thunder
( 11% severe)		 NE   2 96% 42°

Mostly Cloudy

Rain Likely

 LACON, IL 61540 weather forecast Day 2, 9 hours 9 AM 47° 46° Mostly Cloudy NNE   2 89% 44°
LACON, IL 61540 weather forecast Day 2, 12 hours 12 PM 52° 52° Mostly Cloudy 13%
RAIN
.01–.1 in		 0% Thunder
( 0% severe)		 NE   3 80% 46°
LACON, IL 61540 weather forecast Day 2, 15 hours 3 PM 56° 56° Mostly Cloudy N   2 69% 46°
LACON, IL 61540 weather forecast Day 2, 18 hours 6 PM 53° 53° Mostly Cloudy 6%

 0% Thunder
( 0% severe)		 SE   1 77% 46°
LACON, IL 61540 weather forecast Day 2, 21 hours 9 PM 49° 49° Mostly Cloudy SE   1 86% 45°
Friday
6 MAR 2026		 LACON, IL 61540 weather forecast Day 3, 0 hours 12 AM 47° 46° Mostly Cloudy 39%
RAIN
.25–.5 in		 0% Thunder
( 25% severe)		 SE   1 89% 44°
Low 44° LACON, IL 61540 weather forecast Day 3, 3 hours 3 AM 47° 46° Mostly Cloudy SE   3 89% 44°
High 74° LACON, IL 61540 weather forecast Day 3, 6 hours 6 AM 50° 47° Mostly Cloudy 74%
RAIN
***		 0% Thunder
( 24% severe)		 SE   7 89% 47°

Mostly Cloudy

Rain Likely

 LACON, IL 61540 weather forecast Day 3, 9 hours 9 AM 59° 57° Mostly Cloudy S   12 83% 54°
LACON, IL 61540 weather forecast Day 3, 15 hours 12 PM 70° 70° Mostly Cloudy 55%
RAIN
>2 in		 0% Thunder
( 5% severe)		 SSW   15 61% 56°
LACON, IL 61540 weather forecast Day 3, 18 hours 3 PM 73° 73° Mostly Cloudy SSW   14 55% 56°
LACON, IL 61540 weather forecast Day 3, 21 hours 6 PM 69° 69° Mostly Cloudy     S   12 63% 56°

LACON/MARSHALL CNTY, IL extended weather forecast
Saturday
7 MAR 2026		 Sunday
8 MAR 2026		 Monday
9 MAR 2026		 Tuesday
10 MAR 2026		 Wednesday
11 MAR 2026
Low 50° Low 34° Low 44° Low 46° Low 31°
High 57° High 61° High 65° High 54° High 37°
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
Mostly Cloudy
68% Rain		 Clear
9% Rain		 Partly Cloudy
17% Rain		 Overcast
54% Rain		 Overcast
60% Rain/Snow
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