DECATUR, IL 62521 Weather Forecast & Current Conditions

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62521 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)

CURRENT WEATHER
DECATUR, IL Current Weather
5:54 PM CDT MAR 18, 2026
Clear 59°F
Feels Like:	57°F
Dewpoint:	37°F
Rel. Hum.:	44%
Visibility:	10 miles
Wind:	W at 10 mph
Pressure:	30.01 inches
Last 72 hours
Local Area Snow Depth
Illinois Current Weather
Illinois MOS Forecast Weather

Regional Weather Maps

(Automated weather data from NWS/FAA)

62521 WEATHER FORECAST
10-Day model forecast maps 2025 Hurricanes	DECATUR, IL 62521 Weather Forecast	Snowfall Forecast pages Snow Depth pages

TONIGHT
Mostly cloudy. Not as cool with lows in the upper 30s. Southwest winds 5 to 10 mph, becoming southeast after midnight.

THURSDAY
Sunny. Not as cool with highs in the upper 60s. Southeast winds around 5 mph, becoming east in the afternoon.

THURSDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 40s. East winds around 5 mph, becoming south after midnight.

FRIDAY
Mostly sunny. Highs in the mid 70s. Southwest winds 10 to 15 mph.

FRIDAY NIGHT
Mostly cloudy. Lows in the upper 40s. West winds 5 to 10 mph, becoming northwest after midnight.

SATURDAY
Mostly sunny. Highs in the mid 70s.

SATURDAY NIGHT
Mostly clear. Lows in the mid 50s.

SUNDAY AND SUNDAY NIGHT
Mostly cloudy. Highs in the lower 70s. Lows in the lower 30s.

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

TUESDAY AND TUESDAY NIGHT
Mostly cloudy. Highs in the mid 50s. Lows in the upper 30s.

WEDNESDAY
Mostly cloudy in the morning, then becoming partly sunny. Highs in the mid 60s.

62521 WEATHER SATELLITE LOOPS

Visible Weather Satellite
DECATUR, IL 62521

Infrared Weather Satellite
DECATUR, IL 62521

62521 WEATHER RADAR LOOP

NEXRAD Weather Radar
DECATUR, IL 62521

MOS COMPUTER WEATHER FORECAST

DECATUR, IL 3 hourly weather forecast

weather forecast created 7:00 AM EST 3/18/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Wednesday
18 MAR 2026

12 PM

48°

43°

Clear

0%

0% Thunder
( 1% severe)

SSW 13

54%

32°

High 56°

3 PM

55°

52°

Clear

WSW 10

47%

35°

Increasing Clouds

6 PM

48°

46°

Mostly Cloudy

2%

0% Thunder
( 1% severe)

W 5

68%

38°

9 PM

44°

42°

Mostly Cloudy

S 3

79%

38°

Thursday
19 MAR 2026

12 AM

42°

40°

Mostly Cloudy

6%

0% Thunder
( 3% severe)

S 3

86%

38°

Low 38°

3 AM

41°

39°

Mostly Cloudy

S 3

89%

38°

High 66°

6 AM

41°

37°

Mostly Cloudy

5%

0% Thunder
( 2% severe)

S 6

89%

38°

Partly Cloudy

9 AM

51°

49°

Partly Cloudy

WSW 6

74%

43°

12 PM

61°

60°

Clear

2%

0% Thunder
( 1% severe)

NNE 7

58%

46°

3 PM

64°

64°

Partly Cloudy

NE 7

52%

46°

6 PM

58°

58°

Partly Cloudy

1%

0% Thunder
( 1% severe)

ENE 5

67%

47°

9 PM

52°

51°

Partly Cloudy

ESE 5

80%

46°

Friday
20 MAR 2026

12 AM

49°

47°

Partly Cloudy

1%

0% Thunder
( 3% severe)

SSE 6

83%

44°

Low 45°

3 AM

47°

44°

Mostly Cloudy

S 6

89%

44°

High 74°

6 AM

46°

42°

Mostly Cloudy

0%

0% Thunder
( 2% severe)

SSW 7

93%

44°

Mostly Cloudy

9 AM

57°

55°

Mostly Cloudy

SW 9

75%

49°

12 PM

69°

69°

Partly Cloudy

1%

0% Thunder
( 2% severe)

WSW 13

53%

51°

3 PM

73°

73°

Partly Cloudy

W 13

44%

50°

6 PM

65°

65°

Mostly Cloudy

W 9

60%

51°


DECATUR, IL extended weather forecast
Saturday 21 MAR 2026	Sunday 22 MAR 2026	Monday 23 MAR 2026	Tuesday 24 MAR 2026	Wednesday 25 MAR 2026
Low 47°	Low 53°	Low 41°	Low 31°	Low 36°
High 65°	High 70°	High 51°	High 51°	High 55°

Clear 8% Rain	Partly Cloudy 13% Rain	Mostly Cloudy 41% Rain	Partly Cloudy 9% Rain	Overcast 31% Rain

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