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 5, 2026
Clear 81°F
Feels Like:	84°F
Dewpoint:	68°F
Rel. Hum.:	65%
Visibility:	10 miles
Wind:	WSW at 9 mph
Pressure:	30.10 inches
Last 72 hours
Local Area Snow Depth
Illinois Current Weather
Illinois MOS Forecast Weather

Weather Map

(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
Mostly sunny. A slight chance of showers and thunderstorms this afternoon. Highs in the mid 80s. Southwest winds 5 to 10 mph. Chance of rain 20 percent.

TONIGHT
Showers likely with a chance of thunderstorms. Lows in the upper 60s. South winds 5 to 10 mph. Chance of rain 70 percent.

THURSDAY
Mostly cloudy. Showers likely with a slight chance of thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. Southwest winds 5 to 10 mph. Chance of rain 70 percent.

THURSDAY NIGHT
A chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Lows in the upper 60s. South winds around 5 mph. Chance of rain 40 percent.

FRIDAY
Partly sunny. A chance of showers and thunderstorms in the afternoon. Humid with highs in the lower 80s. South winds 5 to 10 mph. Chance of rain 30 percent.

FRIDAY NIGHT
Partly cloudy with a chance of showers and thunderstorms. Lows in the upper 60s. Chance of rain 50 percent.

SATURDAY
Mostly sunny. Highs in the mid 80s.

SATURDAY NIGHT
Mostly clear. Lows in the upper 60s.

SUNDAY
Mostly sunny. Highs in the upper 80s.

SUNDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. A chance of showers after midnight. Lows in the lower 70s. Chance of rain 30 percent.

MONDAY
Mostly sunny. Highs in the upper 80s.

MONDAY NIGHT
Partly cloudy. A chance of showers. Lows in the lower 70s. Chance of rain 40 percent.

TUESDAY
Partly sunny with a chance of showers. A chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 40 percent.

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 PM EDT 8/ 4/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Wednesday
5 AUG 2026

1 AM

68°

68°

Partly Cloudy

1%

0% Thunder
( 1% severe)

SSE 6

87%

64°

Low 65°

4 AM

66°

66°

Clear

S 6

90%

63°

High 86°

7 AM

67°

67°

Partly Cloudy

5%

0% Thunder
( 6% severe)

S 6

87%

63°

Partly Cloudy

Chance of Rain

10 AM

79°

81°

Partly Cloudy

SW 9

64%

66°

1 PM

84°

87°

Partly Cloudy

27%
RAIN
<.01 in

0% Thunder
( 37% severe)

S 10

57%

67°

4 PM

85°

88°

Partly Cloudy

SSW 9

57%

68°

7 PM

81°

84°

Mostly Cloudy

59%
RAIN
***

0% Thunder
( 42% severe)

SSW 7

69%

70°

10 PM

73°

73°

Overcast

ESE 5

90%

70°

Thursday
6 AUG 2026

1 AM

71°

71°

Mostly Cloudy

75%
RAIN
***

0% Thunder
( 34% severe)

SSE 5

93%

69°

Low 68°

4 AM

70°

70°

Mostly Cloudy

WSW 5

97%

69°

High 80°

7 AM

69°

69°

Mostly Cloudy

69%
RAIN
***

0% Thunder
( 21% severe)

SW 6

97%

68°

Mostly Cloudy

Rain Likely

10 AM

73°

73°

Mostly Cloudy

SW 7

87%

69°

1 PM

77°

79°

Mostly Cloudy

21%
RAIN
.01–.1 in

0% Thunder
( 32% severe)

SW 7

79%

70°

4 PM

80°

83°

Mostly Cloudy

SW 7

72%

70°

7 PM

77°

79°

Mostly Cloudy

35%
RAIN
.01–.1 in

0% Thunder
( 33% severe)

SSW 5

79%

70°

10 PM

72°

72°

Mostly Cloudy

SSE 2

97%

71°


DECATUR, IL extended weather forecast
Friday 7 AUG 2026	Saturday 8 AUG 2026	Sunday 9 AUG 2026	Monday 10 AUG 2026	Tuesday 11 AUG 2026
Low 69°	Low 70°	Low 72°	Low 72°	Low 70°
High 87°	High 89°	High 91°	High 93°	High 87°

Partly Cloudy 51% Rain	Partly Cloudy 38% Rain	Partly Cloudy 18% Rain	Partly Cloudy 20% Rain	Mostly Cloudy 44% Rain

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