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
11:15 AM CDT MAY 23, 2026
Overcast 70°F
Feels Like:	70°F
Dewpoint:	55°F
Rel. Hum.:	59%
Visibility:	10 miles
Wind:	Calm
Pressure:	30.00 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

THIS AFTERNOON
Partly sunny. Highs in the upper 70s. West winds around 5 mph.

TONIGHT
Mostly cloudy with a chance of showers and thunderstorms. Lows around 60. Southwest winds around 5 mph. Chance of rain 40 percent.

SUNDAY
Partly sunny with a chance of showers in the morning, then sunny in the afternoon. Highs in the lower 80s. Northwest winds around 5 mph. Chance of rain 30 percent.

SUNDAY NIGHT
Mostly clear. Lows in the upper 50s. Northeast winds around 5 mph in the evening, becoming light and variable.

MEMORIAL DAY
Sunny. Highs in the mid 80s. South winds 5 to 10 mph.

MONDAY NIGHT AND TUESDAY
Partly cloudy. Lows in the lower 60s. Highs in the mid 80s.

TUESDAY NIGHT
Mostly cloudy with a chance of showers. Lows in the mid 60s. Chance of rain 40 percent.

WEDNESDAY
Partly sunny in the morning, then becoming mostly cloudy. A chance of thunderstorms. A chance of showers in the morning, then showers likely in the afternoon. Highs in the lower 80s. Chance of rain 70 percent.

WEDNESDAY NIGHT
Mostly cloudy. A chance of showers in the evening. Lows in the mid 60s. Chance of rain 40 percent.

THURSDAY
Partly sunny. A chance of showers in the afternoon. Highs in the mid 80s. Chance of rain 30 percent.

THURSDAY NIGHT AND FRIDAY
Partly cloudy. Lows around 60. Highs around 80.

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 5/22/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Saturday
23 MAY 2026

1 AM

61°

62°

Mostly Cloudy

2%

0% Thunder
( 2% severe)

ENE 2

72%

52°

Low 58°

4 AM

59°

60°

Mostly Cloudy

CALM

78%

52°

High 78°

7 AM

59°

60°

Mostly Cloudy

2%

0% Thunder
( 5% severe)

CALM

80%

53°

Mostly Cloudy

10 AM

66°

66°

Partly Cloudy

CALM

68%

55°

1 PM

75°

75°

Mostly Cloudy

10%
RAIN
<.01 in

0% Thunder
( 17% severe)

CALM

54%

57°

4 PM

78°

79°

Partly Cloudy

WSW 1

47%

56°

7 PM

77°

79°

Mostly Cloudy

20%
RAIN
<.01 in

0% Thunder
( 22% severe)

CALM

50%

57°

10 PM

68°

68°

Mostly Cloudy

CALM

70%

58°

Sunday
24 MAY 2026

1 AM

64°

66°

Mostly Cloudy

47%
RAIN
***

0% Thunder
( 18% severe)

CALM

78%

57°

Low 58°

4 AM

61°

62°

Mostly Cloudy

CALM

84%

56°

High 80°

7 AM

61°

62°

Mostly Cloudy

15%
RAIN
.01–.1 in

0% Thunder
( 4% severe)

CALM

87%

57°

Decreasing Clouds

10 AM

70°

70°

Partly Cloudy

CALM

63%

57°

1 PM

77°

78°

Clear

1%

0% Thunder
( 7% severe)

CALM

45%

54°

4 PM

80°

80°

Clear

CALM

36%

51°

7 PM

78°

79°

Clear

0%

0% Thunder
( 5% severe)

CALM

42%

53°

10 PM

66°

66°

Partly Cloudy

CALM

61%

52°


LACON/MARSHALL CNTY, IL extended weather forecast
Monday 25 MAY 2026	Tuesday 26 MAY 2026	Wednesday 27 MAY 2026	Thursday 28 MAY 2026	Friday 29 MAY 2026
Low 56°	Low 57°	Low 61°	Low 62°	Low 62°
High 84°	High 85°	High 77°	High 77°	High 81°

Clear 3% Rain	Partly Cloudy 14% Rain	Overcast 60% Rain	Overcast 64% Rain	Overcast 51% Rain

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