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 AM CDT AUG 11, 2026
Clear 84°F
Feels Like:	90°F
Dewpoint:	73°F
Rel. Hum.:	70%
Visibility:	10 miles
Wind:	WSW at 10 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)

62521 WEATHER FORECAST
10-Day model forecast maps 2026 Hurricanes	DECATUR, IL 62521 Weather Forecast	Snowfall Forecast pages Snow Depth pages

REST OF TODAY
Partly sunny with a slight chance of showers and thunderstorms. Highs in the lower 90s. Southwest winds 10 to 15 mph. Chance of rain 20 percent. Heat index values up to 102.

TONIGHT
Partly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Humid with lows in the lower 70s. South winds 5 to 10 mph. Chance of rain 30 percent.

WEDNESDAY
Partly sunny with a chance of showers and thunderstorms. Humid with highs in the upper 80s. Southwest winds 5 to 10 mph, becoming south with gusts up to 20 mph in the afternoon. Chance of rain 40 percent.

WEDNESDAY NIGHT
Partly cloudy with a chance of showers and thunderstorms in the evening, then mostly cloudy with showers likely after midnight. Humid with lows in the lower 70s. East winds 5 to 10 mph. Chance of rain 70 percent.

THURSDAY
Partly sunny in the morning, then becoming mostly cloudy. A chance of showers in the morning. Humid with highs in the mid 80s. East winds 5 to 10 mph. Chance of rain 50 percent.

THURSDAY NIGHT
A chance of thunderstorms. Showers. Lows in the upper 60s. Chance of rain 80 percent.

FRIDAY AND FRIDAY NIGHT
Mostly cloudy with a chance of showers. Highs in the lower 80s. Lows in the upper 60s. Chance of rain 40 percent.

SATURDAY
Mostly sunny. Highs in the upper 80s. Heat index values up to 100 in the afternoon.

SATURDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 70s.

SUNDAY AND SUNDAY NIGHT
Partly cloudy. Highs in the upper 80s. Lows in the upper 60s.

MONDAY
Mostly sunny. Highs in the lower 80s.

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 8/11/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Tuesday
11 AUG 2026

1 PM

87°

95°

Mostly Cloudy

30%
RAIN
.01–.1 in

0% Thunder
( 32% severe)

SW 14

65%

74°

High 89°

4 PM

88°

97°

Partly Cloudy

SW 14

63%

74°

Partly Cloudy

Chance of Rain

7 PM

85°

93°

Partly Cloudy

45%
RAIN
1–2 in

0% Thunder
( 20% severe)

SW 10

72%

75°

10 PM

77°

78°

Partly Cloudy

SSW 8

87%

73°

Wednesday
12 AUG 2026

1 AM

74°

74°

Partly Cloudy

23%
RAIN
<.01 in

0% Thunder
( 38% severe)

S 7

90%

71°

Low 72°

4 AM

73°

73°

Partly Cloudy

SE 6

90%

70°

High 87°

7 AM

73°

73°

Mostly Cloudy

16%
RAIN
<.01 in

0% Thunder
( 28% severe)

SSW 6

90%

70°

Mostly Cloudy

Chance of Rain

10 AM

80°

84°

Partly Cloudy

WSW 7

77%

72°

1 PM

84°

90°

Partly Cloudy

45%
RAIN
***

0% Thunder
( 35% severe)

SW 7

70%

73°

4 PM

84°

90°

Mostly Cloudy

SW 7

70%

73°

7 PM

82°

88°

Partly Cloudy

42%
RAIN
1–2 in

0% Thunder
( 47% severe)

ESE 7

77%

74°

10 PM

75°

75°

Partly Cloudy

ESE 6

97%

74°

Thursday
13 AUG 2026

1 AM

73°

73°

Mostly Cloudy

62%
RAIN
***

0% Thunder
( 36% severe)

SSE 6

100%

73°

Low 72°

4 AM

73°

73°

Mostly Cloudy

NE 7

97%

72°

High 85°

7 AM

72°

72°

Mostly Cloudy

43%
RAIN
***

0% Thunder
( 22% severe)

ESE 7

97%

71°

Mostly Cloudy

Chance of Rain

10 AM

78°

80°

Mostly Cloudy

SSE 7

82%

72°

1 PM

81°

86°

Mostly Cloudy

26%
RAIN
.01–.1 in

0% Thunder
( 30% severe)

S 8

77%

73°

4 PM

83°

90°

Mostly Cloudy

SW 8

74%

74°

7 PM

80°

85°

Mostly Cloudy

NNE 8

82%

74°


DECATUR, IL extended weather forecast
Friday 14 AUG 2026	Saturday 15 AUG 2026	Sunday 16 AUG 2026	Monday 17 AUG 2026	Tuesday 18 AUG 2026
Low 68°	Low 70°	Low 75°	Low 67°	Low 63°
High 86°	High 92°	High 95°	High 86°	High 83°

Overcast 43% Rain	Mostly Cloudy 42% Rain	Partly Cloudy 27% Rain	Partly Cloudy 24% Rain	Mostly Cloudy 25% Rain

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