DECATUR, IL 62521 Weather Forecast & Current Conditions

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62521 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)

CURRENT WEATHER
DECATUR, IL Current Weather
10:54 PM CDT SEP 16, 2026
Clear 75°F
Feels Like:	75°F
Dewpoint:	72°F
Rel. Hum.:	90%
Visibility:	10 miles
Wind:	S at 3 mph
Pressure:	30.25 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 2026 Hurricanes	DECATUR, IL 62521 Weather Forecast	Snowfall Forecast pages Snow Depth pages

REST OF TONIGHT
Partly cloudy. Lows in the lower 70s. Northeast winds around 5 mph, becoming southeast.

THURSDAY
Mostly sunny. A slight chance of showers in the morning. Humid with highs in the lower 90s. West winds 5 to 10 mph. Chance of rain 20 percent. Heat index values up to 100.

THURSDAY NIGHT
Partly cloudy in the evening, then mostly cloudy with a chance of showers after midnight. Humid with lows in the upper 60s. Northeast winds 5 to 10 mph. Chance of rain 30 percent.

FRIDAY
Mostly sunny. A chance of showers in the morning. Highs in the upper 80s. East winds 5 to 10 mph. Chance of rain 40 percent.

FRIDAY NIGHT
Partly cloudy in the evening, then becoming mostly clear. Lows in the upper 60s. East winds 5 to 10 mph, becoming southeast after midnight.

SATURDAY
Mostly sunny. Highs in the lower 90s.

SATURDAY NIGHT AND SUNDAY
Mostly cloudy. A chance of showers and thunderstorms. Lows in the upper 60s. Highs in the mid 80s. Chance of rain 50 percent.

SUNDAY NIGHT AND MONDAY
Mostly cloudy. A chance of showers. Lows in the mid 60s. Highs in the lower 80s. Chance of rain 50 percent.

MONDAY NIGHT
Mostly cloudy. A chance of showers in the evening. Lows in the lower 60s. Chance of rain 40 percent.

TUESDAY
Partly sunny. Highs in the upper 70s.

TUESDAY NIGHT AND WEDNESDAY
Partly cloudy. Lows in the upper 50s. Highs in the upper 70s.

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 8:00 AM EDT 9/16/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Wednesday
16 SEP 2026

1 PM

86°

91°

Mostly Cloudy

11%
RAIN
<.01 in

0% Thunder
( 29% severe)

WSW 7

61%

71°

High 90°

4 PM

89°

95°

Partly Cloudy

WNW 7

56%

71°

Partly Cloudy

7 PM

83°

88°

Partly Cloudy

13%
RAIN
<.01 in

0% Thunder
( 28% severe)

NNE 6

70%

72°

10 PM

75°

75°

Partly Cloudy

E 5

94%

73°

Thursday
17 SEP 2026

1 AM

73°

73°

Partly Cloudy

8%

0% Thunder
( 17% severe)

E 5

97%

72°

Low 72°

4 AM

73°

73°

Partly Cloudy

S 5

93%

71°

High 90°

7 AM

72°

72°

Partly Cloudy

23%
RAIN
.01–.1 in

0% Thunder
( 14% severe)

SSW 6

97%

71°

Partly Cloudy

Chance of Rain

10 AM

81°

85°

Partly Cloudy

NW 7

72%

71°

1 PM

87°

93°

Partly Cloudy

5%

0% Thunder
( 18% severe)

NNW 7

59%

71°

4 PM

88°

94°

Partly Cloudy

WNW 8

57%

71°

7 PM

82°

86°

Partly Cloudy

9%

0% Thunder
( 23% severe)

N 7

69%

71°

10 PM

74°

74°

Partly Cloudy

NE 7

93%

72°

Friday
18 SEP 2026

1 AM

71°

71°

Partly Cloudy

13%
RAIN
<.01 in

0% Thunder
( 24% severe)

NE 7

97%

70°

Low 68°

4 AM

69°

69°

Partly Cloudy

ENE 8

100%

69°

High 87°

7 AM

68°

68°

Mostly Cloudy

13%
RAIN
<.01 in

0% Thunder
( 11% severe)

ENE 8

100%

68°

Mostly Cloudy

10 AM

77°

79°

Mostly Cloudy

E 9

74%

68°

1 PM

84°

87°

Partly Cloudy

7%

0% Thunder
( 21% severe)

E 8

59%

68°

4 PM

86°

89°

Partly Cloudy

E 8

55%

68°

7 PM

81°

84°

Partly Cloudy

E 10

67%

69°


DECATUR, IL extended weather forecast
Saturday 19 SEP 2026	Sunday 20 SEP 2026	Monday 21 SEP 2026	Tuesday 22 SEP 2026	Wednesday 23 SEP 2026
Low 68°	Low 68°	Low 65°	Low 56°	Low 55°
High 88°	High 87°	High 82°	High 79°	High 78°

Partly Cloudy 53% Rain	Overcast 38% Rain	Mostly Cloudy 34% Rain	Partly Cloudy 31% Rain	Mostly Cloudy 41% Rain

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