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
9:15 AM CDT MAY 16, 2026
Clear 66°F
Feels Like:	66°F
Dewpoint:	59°F
Rel. Hum.:	78%
Visibility:	10 miles
Wind:	SW at 3 mph
Pressure:	29.86 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

REST OF TODAY
Mostly sunny with a chance of showers and thunderstorms. Highs in the lower 80s. Southwest winds 5 to 10 mph. Chance of rain 30 percent.

TONIGHT
A chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Lows in the lower 60s. South winds 5 to 10 mph. Chance of rain 40 percent.

SUNDAY
Partly sunny. Highs in the mid 80s. South winds 15 to 20 mph with gusts up to 30 mph.

SUNDAY NIGHT
Mostly clear. Lows in the upper 60s. South winds 15 to 20 mph with gusts up to 30 mph.

MONDAY
Partly sunny with a chance of thunderstorms. A chance of showers in the morning, then showers in the afternoon. Breezy with highs in the mid 80s. South winds 15 to 25 mph. Chance of rain 80 percent.

MONDAY NIGHT
Mostly cloudy with a chance of showers and thunderstorms. Lows in the upper 60s. Chance of rain 50 percent.

TUESDAY
Mostly cloudy with a chance of showers in the morning, then partly sunny with showers likely with a chance of thunderstorms in the afternoon. Breezy with highs in the lower 80s. Chance of rain 70 percent.

TUESDAY NIGHT
Mostly cloudy. A chance of showers in the evening. Cooler with lows in the mid 50s. Chance of rain 50 percent.

WEDNESDAY
Partly sunny. Cooler with highs in the upper 60s.

WEDNESDAY NIGHT THROUGH THURSDAY NIGHT
Partly cloudy. Lows in the upper 40s. Highs around 70.

FRIDAY
Mostly sunny. 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 PM CDT 5/15/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Saturday
16 MAY 2026

1 AM

68°

68°

Mostly Cloudy

46%
RAIN
.5–1 in

0% Thunder
( 38% severe)

S 9

68%

57°

Low 64°

4 AM

66°

66°

Mostly Cloudy

NW 8

73%

57°

High 83°

7 AM

65°

65°

Mostly Cloudy

40%
RAIN
<.01 in

0% Thunder
( 17% severe)

SSW 8

78%

58°

Mostly Cloudy

Chance of Rain

10 AM

73°

73°

Mostly Cloudy

SSW 8

66%

61°

1 PM

79°

80°

Mostly Cloudy

20%
RAIN
.25–.5 in

0% Thunder
( 25% severe)

SW 7

56%

62°

4 PM

81°

81°

Mostly Cloudy

SW 5

47%

59°

7 PM

78°

79°

Mostly Cloudy

20%
RAIN
.25–.5 in

0% Thunder
( 21% severe)

S 5

54%

60°

10 PM

69°

69°

Mostly Cloudy

S 3

73%

60°

Sunday
17 MAY 2026

1 AM

66°

66°

Mostly Cloudy

26%
RAIN
.1–.25 in

0% Thunder
( 11% severe)

SSE 2

78%

59°

Low 61°

4 AM

64°

65°

Mostly Cloudy

ESE 3

84%

59°

High 87°

7 AM

65°

65°

Mostly Cloudy

5%

0% Thunder
( 16% severe)

SSE 8

81%

59°

Partly Cloudy

10 AM

74°

74°

Partly Cloudy

S 10

66%

62°

1 PM

83°

84°

Partly Cloudy

1%

0% Thunder
( 13% severe)

S 15

51%

63°

4 PM

87°

87°

Partly Cloudy

S 17

40%

60°

7 PM

84°

84°

Partly Cloudy

0%

0% Thunder
( 11% severe)

S 15

44%

60°

10 PM

77°

79°

Clear

S 15

52%

58°


LACON/MARSHALL CNTY, IL extended weather forecast
Monday 18 MAY 2026	Tuesday 19 MAY 2026	Wednesday 20 MAY 2026	Thursday 21 MAY 2026	Friday 22 MAY 2026
Low 67°	Low 68°	Low 53°	Low 43°	Low 45°
High 82°	High 76°	High 62°	High 65°	High 68°

Overcast 68% Rain	Overcast 75% Rain	Overcast 43% Rain	Mostly Cloudy 28% Rain	Clear 19% Rain

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