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 19, 2026
Few Clouds 75°F
Feels Like:	75°F
Dewpoint:	72°F
Rel. Hum.:	90%
Visibility:	10 miles
Wind:	E at 6 mph
Pressure:	29.92 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 TONIGHT
Mostly cloudy. Lows around 70. South winds around 5 mph.

SUNDAY
Partly sunny. A slight chance of showers in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. Temperature falling to around 80 in the afternoon. North winds 10 to 15 mph. Chance of rain 30 percent.

SUNDAY NIGHT
Mostly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Cooler with lows around 60. Northeast winds 10 to 15 mph. Chance of rain 50 percent.

MONDAY
Showers likely, mainly in the morning. Cooler with highs in the lower 70s. Northeast winds 15 to 20 mph. Chance of rain 70 percent.

MONDAY NIGHT
Mostly cloudy. A chance of showers after midnight. Lows in the mid 50s. Northeast winds 10 to 15 mph. Chance of rain 50 percent.

TUESDAY THROUGH WEDNESDAY
Mostly cloudy. Highs in the upper 60s. Lows in the lower 50s.

WEDNESDAY NIGHT
Mostly cloudy in the evening, then becoming partly cloudy. Lows in the lower 50s.

THURSDAY THROUGH FRIDAY
Mostly cloudy. Highs in the mid 70s. Lows in the mid 50s.

FRIDAY NIGHT AND SATURDAY
Partly cloudy. Lows in the mid 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 PM EDT 9/19/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Sunday
20 SEP 2026

1 AM

73°

73°

Mostly Cloudy

6%

0% Thunder
( 12% severe)

S 7

81%

67°

Low 69°

4 AM

72°

72°

Mostly Cloudy

SW 7

81%

66°

High 84°

7 AM

70°

70°

Mostly Cloudy

15%
RAIN
<.01 in

0% Thunder
( 14% severe)

N 5

90%

67°

Mostly Cloudy

Chance of Rain

10 AM

79°

82°

Mostly Cloudy

ENE 7

72%

69°

1 PM

82°

85°

Mostly Cloudy

42%
RAIN
>2 in

0% Thunder
( 35% severe)

S 8

63%

68°

4 PM

81°

84°

Mostly Cloudy

N 10

65%

68°

7 PM

73°

73°

Mostly Cloudy

24%
RAIN
1–2 in

0% Thunder
( 26% severe)

NNE 14

84%

68°

10 PM

67°

67°

Mostly Cloudy

NE 13

97%

66°

Monday
21 SEP 2026

1 AM

65°

65°

Mostly Cloudy

67%
RAIN
***

0% Thunder
( 13% severe)

ENE 12

97%

64°

Low 60°

4 AM

64°

63°

Mostly Cloudy

ENE 13

97%

63°

High 71°

7 AM

62°

60°

Mostly Cloudy

44%
RAIN
***

0% Thunder
( 3% severe)

ENE 14

97%

61°

Mostly Cloudy

Chance of Rain

10 AM

66°

66°

Mostly Cloudy

NE 14

84%

61°

1 PM

69°

69°

Mostly Cloudy

30%
RAIN
.1–.25 in

0% Thunder
( 2% severe)

ENE 14

76%

61°

4 PM

70°

70°

Mostly Cloudy

NE 15

71%

60°

7 PM

65°

65°

Mostly Cloudy

16%
RAIN
<.01 in

0% Thunder
( 2% severe)

NE 14

81%

59°

10 PM

61°

59°

Mostly Cloudy

NE 13

93%

59°


DECATUR, IL extended weather forecast
BAD DAY BAD DATE	BAD DAY BAD DATE	BAD DAY BAD DATE	BAD DAY BAD DATE	BAD DAY BAD DATE
Low 60°	Low 54°	Low 53°	Low 54°	Low 55°
High 68°	High 68°	High 74°	High 74°	High 75°

Overcast 84% Rain	Overcast 34% Rain	Overcast 24% Rain	Mostly Cloudy 18% Rain	Overcast 39% Rain

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