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
3:15 PM CDT JUL 25, 2026
Overcast 79°F
Feels Like:	81°F
Dewpoint:	68°F
Rel. Hum.:	69%
Visibility:	10 miles
Wind:	SSW at 3 mph
Pressure:	29.97 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 2026 Hurricanes	LACON, IL 61540 Weather Forecast	Snowfall Forecast pages Snow Depth pages

THIS AFTERNOON
Mostly cloudy. Highs around 80. South winds around 5 mph.

TONIGHT
Partly cloudy in the evening, then becoming mostly cloudy. Patchy fog after midnight. Humid with lows around 70. South winds around 5 mph.

SUNDAY
Mostly cloudy in the morning, then becoming partly sunny. Patchy fog in the morning. A slight chance of showers and thunderstorms. Warmer with highs around 90. South winds 5 to 10 mph. Chance of rain 20 percent. Heat index values up to 104 in the afternoon.

SUNDAY NIGHT
Partly cloudy. Humid with lows in the mid 70s. Southwest winds 5 to 10 mph.

MONDAY
Mostly sunny. Humid with highs in the lower 90s. Southwest winds 10 to 15 mph with gusts up to 25 mph. Heat index values up to 108.

MONDAY NIGHT
Mostly clear. Lows in the lower 70s.

TUESDAY
Mostly sunny. Highs in the upper 80s.

TUESDAY NIGHT THROUGH WEDNESDAY NIGHT
Mostly clear. Lows in the mid 60s. Highs in the mid 80s.

THURSDAY THROUGH FRIDAY
Partly cloudy. Highs in the mid 80s. Lows in the mid 60s.

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 7/25/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Saturday
25 JUL 2026

1 PM

77°

79°

Mostly Cloudy

0%

0% Thunder
( 16% severe)

SSW 6

71%

67°

High 83°

4 PM

81°

84°

Partly Cloudy

SSW 5

67%

69°

Partly Cloudy

7 PM

82°

86°

Partly Cloudy

1%

0% Thunder
( 5% severe)

CALM

67%

70°

10 PM

75°

75°

Partly Cloudy

CALM

87%

71°

Sunday
26 JUL 2026

1 AM

73°

73°

Mostly Cloudy

2%

0% Thunder
( 4% severe)

CALM

90%

70°

Low 70°

4 AM

72°

72°

Mostly Cloudy

CALM

93%

70°

High 91°

7 AM

73°

73°

Mostly Cloudy

3%

0% Thunder
( 7% severe)

CALM

97%

72°

Mostly Cloudy

10 AM

83°

90°

Mostly Cloudy

S 3

74%

74°

1 PM

89°

99°

Mostly Cloudy

3%

0% Thunder
( 19% severe)

S 7

64%

75°

4 PM

91°

102°

Mostly Cloudy

SSW 8

60%

75°

7 PM

88°

98°

Mostly Cloudy

4%

0% Thunder
( 19% severe)

SSW 7

66%

75°

10 PM

81°

86°

Partly Cloudy

SSW 7

79%

74°

Monday
27 JUL 2026

1 AM

78°

80°

Partly Cloudy

1%

0% Thunder
( 15% severe)

SSW 7

85%

73°

Low 75°

4 AM

77°

78°

Mostly Cloudy

SW 7

85%

72°

High 93°

7 AM

77°

78°

Partly Cloudy

8%

0% Thunder
( 17% severe)

SW 7

87%

73°

Partly Cloudy

10 AM

86°

94°

Partly Cloudy

WSW 9

68%

74°

1 PM

91°

102°

Partly Cloudy

5%

0% Thunder
( 16% severe)

SW 12

60%

75°

4 PM

93°

105°

Clear

WSW 12

56%

75°

7 PM

90°

101°

Partly Cloudy

WSW 8

62%

75°


LACON/MARSHALL CNTY, IL extended weather forecast
Tuesday 28 JUL 2026	Wednesday 29 JUL 2026	Thursday 30 JUL 2026	Friday 31 JUL 2026	Saturday 1 AUG 2026
Low 74°	Low 68°	Low 64°	Low 66°	Low 66°
High 93°	High 89°	High 89°	High 90°	High 84°

Partly Cloudy 14% Rain	Clear 7% Rain	Clear 9% Rain	Partly Cloudy 19% Rain	Partly Cloudy 33% Rain

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