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 14, 2026
Few Clouds Light Rain 72°F
Feels Like:	72°F
Dewpoint:	70°F
Rel. Hum.:	93%
Visibility:	10 miles
Wind:	S at 10 mph
Pressure:	30.08 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
A slight chance of thunderstorms. Showers likely. Some thunderstorms may produce heavy rainfall. Highs in the mid 80s. Southeast winds 5 to 10 mph. Chance of rain 70 percent.

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

SATURDAY
Partly sunny. A chance of showers, mainly in the morning. Humid with highs in the lower 90s. South winds 5 to 10 mph. Chance of rain 50 percent. Heat index values up to 107 in the afternoon.

SATURDAY NIGHT
Partly cloudy. Humid with lows in the mid 70s. Southwest winds 5 to 10 mph.

SUNDAY
Partly sunny. A chance of showers and thunderstorms in the afternoon. Humid with highs in the upper 80s. Northwest winds 5 to 10 mph. Chance of rain 40 percent. Heat index values up to 102.

SUNDAY NIGHT
Mostly cloudy. A chance of showers and thunderstorms in the evening. Lows in the upper 60s. Chance of rain 40 percent.

MONDAY AND MONDAY NIGHT
Partly cloudy. Highs in the lower 80s. Lows in the lower 60s.

TUESDAY AND TUESDAY NIGHT
Mostly clear. Highs in the lower 80s. Lows in the upper 60s.

WEDNESDAY
Mostly sunny. Highs in the upper 80s.

WEDNESDAY NIGHT
A chance of showers in the evening. Partly cloudy. Lows in the upper 60s. Chance of rain 30 percent.

THURSDAY
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 8/14/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Friday
14 AUG 2026

1 PM

86°

94°

Mostly Cloudy

8%

0% Thunder
( 36% severe)

S 6

68%

74°

High 88°

4 PM

87°

97°

Mostly Cloudy

ESE 6

68%

75°

Mostly Cloudy

7 PM

84°

93°

Partly Cloudy

10%
RAIN
<.01 in

0% Thunder
( 36% severe)

E 7

77%

76°

10 PM

77°

78°

Mostly Cloudy

E 8

97%

76°

Saturday
15 AUG 2026

1 AM

76°

75°

Partly Cloudy

31%
RAIN
***

0% Thunder
( 28% severe)

E 8

97%

75°

Low 75°

4 AM

75°

75°

Partly Cloudy

SE 8

97%

74°

High 89°

7 AM

75°

75°

Mostly Cloudy

37%
RAIN
.5–1 in

0% Thunder
( 14% severe)

S 7

94%

73°

Mostly Cloudy

Chance of Rain

10 AM

82°

88°

Mostly Cloudy

SE 8

77%

74°

1 PM

87°

97°

Mostly Cloudy

7%

0% Thunder
( 20% severe)

SSW 9

68%

75°

4 PM

88°

98°

Mostly Cloudy

SW 10

66%

75°

7 PM

85°

95°

Partly Cloudy

1%

0% Thunder
( 15% severe)

WSW 8

75%

76°

10 PM

78°

81°

Partly Cloudy

SW 7

91%

75°

Sunday
16 AUG 2026

1 AM

77°

78°

Partly Cloudy

8%

0% Thunder
( 21% severe)

SW 7

87%

73°

Low 75°

4 AM

77°

78°

Partly Cloudy

SW 8

85%

72°

High 88°

7 AM

76°

76°

Mostly Cloudy

5%

0% Thunder
( 11% severe)

WNW 8

87%

72°

Mostly Cloudy

10 AM

83°

90°

Mostly Cloudy

WNW 10

74%

74°

1 PM

87°

95°

Mostly Cloudy

18%
RAIN
.1–.25 in

0% Thunder
( 30% severe)

NW 12

65%

74°

4 PM

86°

94°

Mostly Cloudy

WNW 12

68%

74°

7 PM

81°

86°

Partly Cloudy

NW 12

77%

73°


DECATUR, IL extended weather forecast
Monday 17 AUG 2026	Tuesday 18 AUG 2026	Wednesday 19 AUG 2026	Thursday 20 AUG 2026	Friday 21 AUG 2026
Low 68°	Low 65°	Low 71°	Low 66°	Low 63°
High 88°	High 89°	High 86°	High 82°	High 80°

Partly Cloudy 24% Rain	Partly Cloudy 14% Rain	Overcast 48% Rain	Overcast 51% Rain	Overcast 49% Rain

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