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
9:35 PM CDT SEP 19, 2026
Overcast 72°F
Feels Like:	72°F
Dewpoint:	68°F
Rel. Hum.:	87%
Visibility:	10 miles
Wind:	ESE at 9 mph
Pressure:
Last 72 hours
Local Area Snow Depth
Illinois Current Weather
Illinois MOS Forecast Weather

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(Automated weather data from NWS/FAA)

61540 WEATHER FORECAST
10-Day model forecast maps 2026 Hurricanes	LACON, IL 61540 Weather Forecast	Snowfall Forecast pages Snow Depth pages

REST OF TONIGHT
Thunderstorms likely. Showers likely. Lows in the upper 60s. East winds around 5 mph. Chance of rain 70 percent.

SUNDAY
Patchy fog in the morning. Showers and thunderstorms likely in the morning, then showers likely with a slight chance of thunderstorms in the afternoon. Highs in the lower 70s. Northeast winds 10 to 15 mph. Chance of rain 70 percent.

SUNDAY NIGHT
A slight chance of thunderstorms in the evening. Cloudy with a chance of showers. Cooler with lows in the upper 50s. Northeast winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 50 percent.

MONDAY
Showers likely, mainly in the morning. Highs in the mid 60s. East winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 70 percent.

MONDAY NIGHT
Mostly cloudy. A chance of showers in the evening, then showers likely after midnight. Lows in the mid 50s. Northeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 60 percent.

TUESDAY THROUGH WEDNESDAY
Mostly cloudy. Highs in the mid 60s. Lows in the lower 50s.

WEDNESDAY NIGHT
Partly cloudy. Lows in the lower 50s.

THURSDAY THROUGH FRIDAY
Mostly cloudy. Highs in the lower 70s. Lows in the mid 50s.

FRIDAY NIGHT AND SATURDAY
Partly cloudy. Lows in the mid 50s. Highs in the mid 70s.

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 9/19/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Saturday
19 SEP 2026

1 PM

79°

82°

Mostly Cloudy

5%

0% Thunder
( 11% severe)

SSE 6

74%

70°

High 83°

4 PM

82°

86°

Mostly Cloudy

S 6

67%

70°

Mostly Cloudy

Chance of Rain

7 PM

79°

82°

Mostly Cloudy

40%
RAIN
***

0% Thunder
( 28% severe)

S 2

77%

71°

10 PM

73°

73°

Mostly Cloudy

CALM

90%

70°

Sunday
20 SEP 2026

1 AM

71°

71°

Mostly Cloudy

61%
RAIN
***

0% Thunder
( 24% severe)

CALM

93%

69°

Low 66°

4 AM

70°

70°

Mostly Cloudy

CALM

93%

68°

High 72°

7 AM

68°

68°

Mostly Cloudy

60%
RAIN
***

0% Thunder
( 23% severe)

NNE 5

97%

67°

Mostly Cloudy

Rain Likely

10 AM

70°

70°

Mostly Cloudy

N 8

84%

65°

1 PM

70°

70°

Mostly Cloudy

53%
RAIN
>2 in

0% Thunder
( 23% severe)

NE 10

78%

63°

4 PM

69°

69°

Mostly Cloudy

NE 12

78%

62°

7 PM

66°

66°

Mostly Cloudy

41%
RAIN
***

0% Thunder
( 9% severe)

NE 12

78%

59°

10 PM

62°

61°

Mostly Cloudy

NE 10

87%

58°

Monday
21 SEP 2026

1 AM

61°

60°

Mostly Cloudy

38%
RAIN
***

0% Thunder
( 9% severe)

ENE 9

90%

58°

Low 55°

4 AM

60°

58°

Mostly Cloudy

ENE 10

84%

55°

High 65°

7 AM

57°

55°

Mostly Cloudy

64%
RAIN
***

0% Thunder
( 8% severe)

ENE 10

93%

55°

Mostly Cloudy

Rain Likely

10 AM

61°

59°

Mostly Cloudy

ENE 12

78%

54°

1 PM

63°

62°

Mostly Cloudy

41%
RAIN
.01–.1 in

0% Thunder
( 8% severe)

E 12

70%

53°

4 PM

63°

62°

Mostly Cloudy

ENE 12

70%

53°

7 PM

62°

61°

Mostly Cloudy

ENE 12

70%

52°


LACON/MARSHALL CNTY, IL extended weather forecast
Tuesday 22 SEP 2026	Wednesday 23 SEP 2026	Thursday 24 SEP 2026	Friday 25 SEP 2026	Saturday 26 SEP 2026
Low 54°	Low 51°	Low 53°	Low 53°	Low 53°
High 63°	High 68°	High 72°	High 73°	High 75°

Overcast 50% Rain	Overcast 28% Rain	Mostly Cloudy 21% Rain	Overcast 36% Rain	Partly Cloudy 28% Rain

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