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
6:55 PM CST FEB 18, 2026
Clear 54°F
Feels Like:	53°F
Dewpoint:	12°F
Rel. Hum.:	17%
Visibility:	10 miles
Wind:	S at 5 mph
Pressure:	29.63 inches
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 2025 Hurricanes	LACON, IL 61540 Weather Forecast	Snowfall Forecast pages Snow Depth pages

TONIGHT
Partly cloudy this evening, then becoming mostly cloudy. Lows in the lower 40s. Southwest winds 5 to 10 mph with gusts up to 20 mph, becoming south after midnight.

THURSDAY
Mostly cloudy. A chance of rain with a slight chance of thunderstorms in the afternoon. Highs in the mid 60s. Southeast winds 10 to 15 mph. Chance of rain 50 percent.

THURSDAY NIGHT
Mostly cloudy. Rain likely in the evening, then a chance of rain and snow after midnight. Breezy with lows in the mid 30s. South winds 10 to 15 mph, becoming southwest 15 to 25 mph after midnight. Chance of precipitation 60 percent.

FRIDAY
Mostly cloudy in the morning, then becoming partly sunny. Breezy and much cooler with highs in the lower 40s. West winds 15 to 25 mph with gusts up to 35 mph.

FRIDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 20s. West winds 10 to 15 mph.

SATURDAY
Mostly sunny. Highs in the upper 30s.

SATURDAY NIGHT AND SUNDAY
Mostly cloudy. Lows in the lower 20s. Highs in the lower 30s.

SUNDAY NIGHT THROUGH MONDAY NIGHT
Partly cloudy. Lows around 20. Highs in the mid 30s.

TUESDAY
Mostly sunny. Not as cool with highs in the mid 40s.

TUESDAY NIGHT AND WEDNESDAY
Mostly cloudy. Lows in the lower 30s. Highs in the lower 50s.

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 2/18/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Wednesday
18 FEB 2026

12 PM

62°

60°

Clear

0%

0% Thunder
( 0% severe)

W 16

28%

29°

High 65°

3 PM

64°

63°

Clear

WSW 15

20%

23°

Partly Cloudy

6 PM

55°

53°

Partly Cloudy

0%

0% Thunder
( 0% severe)

SW 8

28%

23°

9 PM

48°

45°

Partly Cloudy

SSW 6

40%

25°

Thursday
19 FEB 2026

12 AM

43°

42°

Mostly Cloudy

5%

0% Thunder
( 0% severe)

SSW 2

50%

26°

Low 38°

3 AM

41°

39°

Mostly Cloudy

ESE 2

57%

27°

High 63°

6 AM

39°

37°

Mostly Cloudy

9%

0% Thunder
( 4% severe)

E 2

64%

28°

Mostly Cloudy

Chance of Rain

9 AM

48°

45°

Mostly Cloudy

ESE 6

60%

35°

12 PM

58°

56°

Mostly Cloudy

47%
RAIN
.1–.25 in

0% Thunder
( 15% severe)

SE 9

53%

41°

3 PM

62°

61°

Mostly Cloudy

SSE 10

52%

44°

6 PM

56°

54°

Partly Cloudy

48%
RAIN
1–2 in

0% Thunder
( 15% severe)

S 8

59%

42°

9 PM

50°

46°

Partly Cloudy

S 9

71%

41°

Friday
20 FEB 2026

12 AM

45°

39°

Partly Cloudy

29%
RAIN
.1–.25 in

0% Thunder
( 0% severe)

SW 12

73%

37°

Low 33°

3 AM

40°

32°

Mostly Cloudy

WSW 14

76%

33°

High 43°

6 AM

36°

27°

Mostly Cloudy

9%

0% Thunder
( 0% severe)

W 15

75%

29°

Mostly Cloudy

Breezy

9 AM

36°

26°

Mostly Cloudy

W 17

69%

27°

12 PM

39°

30°

Mostly Cloudy

1%

0% Thunder
( 0% severe)

W 17

54%

24°

3 PM

40°

32°

Partly Cloudy

W 15

47%

22°

6 PM

37°

30°

Partly Cloudy

W 9

48%

20°


LACON/MARSHALL CNTY, IL extended weather forecast
Saturday 21 FEB 2026	Sunday 22 FEB 2026	Monday 23 FEB 2026	Tuesday 24 FEB 2026	Wednesday 25 FEB 2026
Low 22°	Low 17°	Low 15°	Low 20°	Low 32°
High 33°	High 30°	High 32°	High 41°	High 42°

Clear 11% Snow	Partly Cloudy 13% Snow	Partly Cloudy 9% Snow	Partly Cloudy 13% Rain/Snow	Mostly Cloudy 33% Rain/Snow

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