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
4:55 PM CDT MAR 16, 2026
Overcast 23°F
Feels Like:	8°F
Dewpoint:	14°F
Rel. Hum.:	65%
Visibility:	10 miles
Wind:	WNW at 21 mph, gusts to 29
Pressure:
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 2025 Hurricanes	LACON, IL 61540 Weather Forecast	Snowfall Forecast pages Snow Depth pages

TONIGHT
Mostly cloudy. Scattered flurries this evening. Patchy blowing snow this evening. Cooler with lows around 8 above. Northwest winds 15 to 20 mph. Gusts up to 35 mph this evening. Wind chill values as low as 8 below after midnight.

TUESDAY
Mostly sunny. Highs in the mid 20s. Northwest winds around 10 mph with gusts up to 20 mph, becoming west in the afternoon. Wind chill values as low as 8 below in the morning.

TUESDAY NIGHT
Snow, mainly in the evening. Snow accumulation of 1 to 3 inches. Not as cool with lows in the lower 20s. Temperature rising into the mid 20s after midnight. South winds 10 to 15 mph with gusts up to 25 mph. Chance of snow 90 percent.

WEDNESDAY
Partly sunny in the morning, then clearing. Not as cool with highs in the mid 40s. South winds 10 to 15 mph, becoming southwest 5 to 10 mph in the afternoon.

WEDNESDAY NIGHT
Partly cloudy in the evening, then becoming mostly cloudy. Not as cool with lows in the lower 30s. Southwest winds around 5 mph.

THURSDAY
Mostly sunny. Not as cool with highs in the upper 50s.

THURSDAY NIGHT
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the upper 30s.

FRIDAY
Mostly sunny. Not as cool with highs in the upper 60s.

FRIDAY NIGHT
Mostly cloudy. Lows in the lower 40s.

SATURDAY
Mostly sunny. Highs in the upper 60s.

SATURDAY NIGHT
Partly cloudy in the evening, then becoming mostly clear. Lows in the lower 40s.

SUNDAY
Mostly sunny. Highs in the lower 60s.

SUNDAY NIGHT AND MONDAY
Mostly cloudy. Lows in the lower 30s. Highs in the upper 40s.

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 3/16/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Monday
16 MAR 2026

12 PM

22°

7°

Mostly Cloudy

27%
SNOW
.1–1 in

0% Thunder
( 3% severe)

NW 20

71%

15°

High 23°

3 PM

22°

7°

Mostly Cloudy

NW 18

65%

13°

Mostly Cloudy

Chance of Snow

Breezy

6 PM

18°

4°

Mostly Cloudy

1%

0% Thunder
( 0% severe)

WNW 15

64%

9°

9 PM

14°

0°

Mostly Cloudy

WNW 13

70%

7°

Tuesday
17 MAR 2026

12 AM

12°

-2°

Mostly Cloudy

0%

0% Thunder
( 0% severe)

WNW 12

66%

4°

Low 7°

3 AM

10°

-4°

Mostly Cloudy

WNW 10

69%

3°

High 26°

6 AM

9°

-3°

Partly Cloudy

0%

0% Thunder
( 0% severe)

WNW 8

65%

1°

Partly Cloudy

9 AM

13°

3°

Partly Cloudy

NW 7

59%

3°

12 PM

19°

10°

Partly Cloudy

5%

0% Thunder
( 0% severe)

W 7

49%

5°

3 PM

23°

16°

Mostly Cloudy

SW 6

45%

7°

6 PM

23°

18°

Mostly Cloudy

67%
SNOW
***

0% Thunder
( 1% severe)

S 3

53%

10°

9 PM

22°

13°

Mostly Cloudy

S 7

71%

15°

Wednesday
18 MAR 2026

12 AM

24°

14°

Mostly Cloudy

49%
SNOW
1–2.5 in

0% Thunder
( 1% severe)

SSE 9

75%

18°

Low 21°

3 AM

26°

17°

Mostly Cloudy

S 9

76%

20°

High 45°

6 AM

28°

20°

Mostly Cloudy

2%

0% Thunder
( 1% severe)

S 8

80%

23°

Partly Cloudy

9 AM

34°

27°

Partly Cloudy

S 8

78%

28°

12 PM

41°

36°

Partly Cloudy

0%

0% Thunder
( 0% severe)

SW 7

67%

31°

3 PM

45°

42°

Partly Cloudy

WSW 6

63%

33°

6 PM

40°

38°

Partly Cloudy

WSW 2

76%

33°


LACON/MARSHALL CNTY, IL extended weather forecast
Thursday 19 MAR 2026	Friday 20 MAR 2026	Saturday 21 MAR 2026	Sunday 22 MAR 2026	Monday 23 MAR 2026
Low 29°	Low 40°	Low 42°	Low 45°	Low 29°
High 54°	High 59°	High 62°	High 54°	High 43°

Partly Cloudy 8% Rain/Snow	Partly Cloudy 8% Rain	Partly Cloudy 12% Rain	Partly Cloudy 22% Rain	Clear 9% Rain

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