DECATUR, IL 62521 Weather Forecast & Current Conditions

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62521 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)

CURRENT WEATHER
DECATUR, IL Current Weather
11:54 AM CDT AUG 17, 2026
Broken Clouds 77°F
Feels Like:	79°F
Dewpoint:	64°F
Rel. Hum.:	64%
Visibility:	10 miles
Wind:	NNW at 15 mph
Pressure:	30.07 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

THIS AFTERNOON
Sunny. Near steady temperature in the upper 70s. North winds 10 to 15 mph.

TONIGHT
Partly cloudy in the evening, then clearing. Lows around 60. North winds 5 to 10 mph in the evening, becoming light and variable.

TUESDAY
Mostly sunny. Highs in the lower 80s. Southwest winds 5 to 10 mph.

TUESDAY NIGHT
Mostly cloudy. A chance of showers and thunderstorms after midnight. Lows in the mid 60s. Southwest winds around 5 mph. Chance of rain 50 percent.

WEDNESDAY
Showers likely, mainly in the morning. Highs in the lower 80s. Northwest winds around 5 mph. Chance of rain 70 percent.

WEDNESDAY NIGHT THROUGH FRIDAY
Partly cloudy. Lows in the lower 60s. Highs around 80.

FRIDAY NIGHT
Mostly clear. Lows in the lower 60s.

SATURDAY
Mostly sunny. Highs in the lower 80s.

SATURDAY NIGHT AND SUNDAY
Mostly clear. Lows in the lower 60s. 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 8/17/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

TIME
CDT

TEMP
(deg. F)

FEELS
LIKE

CLOUD
COVER

PRECIP
PROB.

THUNDER
PROB.

WIND
dir./mph

REL
HUM

DEWPT
(deg. F)

Monday
17 AUG 2026

1 PM

78°

80°

Clear

0% Thunder
( 3% severe)

NNW 12

64%

65°

High 79°

4 PM

78°

80°

Partly Cloudy

NNW 13

64%

65°

Partly Cloudy

7 PM

75°

Partly Cloudy

0% Thunder
( 2% severe)

NNW 8

71%

65°

10 PM

68°

Partly Cloudy

NNW 2

90%

65°

Tuesday
18 AUG 2026

1 AM

64°

66°

Clear

0% Thunder
( 1% severe)

CALM

100%

64°

Low 61°

4 AM

63°

64°

Partly Cloudy

CALM

97%

62°

High 81°

7 AM

63°

64°

Partly Cloudy

0% Thunder
( 1% severe)

CALM

100%

63°

Partly Cloudy

10 AM

75°

Partly Cloudy

WSW 5

71%

65°

1 PM

79°

81°

Partly Cloudy

0% Thunder
( 11% severe)

WSW 7

62%

65°

4 PM

80°

82°

Partly Cloudy

SW 7

62%

66°

7 PM

78°

80°

Mostly Cloudy

0% Thunder
( 19% severe)

SSW 6

71%

68°

10 PM

71°

Mostly Cloudy

S 5

90%

68°

Wednesday
19 AUG 2026

1 AM

69°

Mostly Cloudy

37%
RAIN
>2 in

0% Thunder
( 22% severe)

SSW 5

93%

67°

Low 66°

4 AM

68°

Mostly Cloudy

SW 5

97%

67°

High 80°

7 AM

68°

Mostly Cloudy

18%
RAIN
.25–.5 in

0% Thunder
( 18% severe)

SW 5

97%

67°

Mostly Cloudy

Chance of Rain

10 AM

73°

Mostly Cloudy

ESE 5

84%

68°

1 PM

77°

79°

Mostly Cloudy

21%
RAIN
<.01 in

0% Thunder
( 40% severe)

NNE 6

74%

68°

4 PM

78°

80°

Mostly Cloudy

N 7

71%

68°

7 PM

75°

Mostly Cloudy

NNE 7

79%

68°


DECATUR, IL extended weather forecast
Thursday 20 AUG 2026	Friday 21 AUG 2026	Saturday 22 AUG 2026	Sunday 23 AUG 2026	Monday 24 AUG 2026
Low 63°	Low 60°	Low 62°	Low 62°	Low 59°
High 84°	High 84°	High 85°	High 83°	High 77°

Partly Cloudy 14% Rain	Partly Cloudy 17% Rain	Partly Cloudy 23% Rain	Partly Cloudy 22% Rain	Overcast 29% Rain

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DECATUR, IL 62521 Weather Forecast & Current Conditions

DECATUR, IL Current Weather

DECATUR, IL 62521 Weather Forecast

DECATUR, IL 3 hourly weather forecast

DECATUR, IL extended weather forecast

DECATUR, IL
Current Weather

DECATUR, IL 62521
Weather Forecast