ILLIOPOLIS, IL 62539 Weather Forecast & Current Conditions

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62539 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)

CURRENT WEATHER
DECATUR, IL Current Weather
11:54 PM CDT JUN 8, 2026
Clear 72°F
Feels Like:	72°F
Dewpoint:	70°F
Rel. Hum.:	93%
Visibility:	10 miles
Wind:
Pressure:	29.97 inches
Last 72 hours
Local Area Snow Depth
Illinois Current Weather
Illinois MOS Forecast Weather

Weather Map

(Automated weather data from NWS/FAA)

62539 WEATHER FORECAST
10-Day model forecast maps 2025 Hurricanes	ILLIOPOLIS, IL 62539 Weather Forecast	Snowfall Forecast pages Snow Depth pages

REST OF TONIGHT
Mostly cloudy with a chance of showers and thunderstorms. Some thunderstorms may produce heavy rainfall. Lows in the upper 60s. South winds around 5 mph. Chance of rain 50 percent.

TUESDAY
Partly sunny. A slight chance of showers and thunderstorms in the morning. Warmer with highs around 90. Southwest winds 5 to 10 mph. Chance of rain 20 percent. Heat index values up to 101 in the afternoon.

TUESDAY NIGHT
Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly clear after midnight. Humid with lows in the lower 70s. Southwest winds 5 to 10 mph. Chance of rain 20 percent.

WEDNESDAY
Sunny with highs in the lower 90s. Southwest winds 15 to 20 mph with gusts up to 30 mph.

WEDNESDAY NIGHT
A chance of thunderstorms in the evening. Partly cloudy with a chance of showers. Lows in the lower 70s. Southwest winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 50 percent.

THURSDAY
Mostly sunny. A chance of showers in the morning, then showers and thunderstorms likely in the afternoon. Highs in the lower 90s. Chance of rain 60 percent.

THURSDAY NIGHT
Showers likely with a chance of thunderstorms in the evening, then mostly cloudy after midnight. Lows in the mid 60s. Chance of rain 70 percent.

FRIDAY
Sunny. Highs in the mid 80s.

FRIDAY NIGHT
Clear. Lows in the lower 60s.

SATURDAY
Mostly sunny. Highs in the upper 80s.

SATURDAY NIGHT AND SUNDAY
Partly cloudy. A chance of showers and thunderstorms. Lows in the mid 60s. Highs in the lower 80s. Chance of rain 40 percent.

SUNDAY NIGHT
Partly cloudy with a 30 percent chance of showers. Lows around 60.

MONDAY
Partly sunny. A chance of showers in the afternoon. Highs in the upper 70s. Chance of rain 30 percent.

62539 WEATHER SATELLITE LOOPS

Visible Weather Satellite
ILLIOPOLIS, IL 62539

Infrared Weather Satellite
ILLIOPOLIS, IL 62539

62539 WEATHER RADAR LOOP

NEXRAD Weather Radar
ILLIOPOLIS, IL 62539

MOS COMPUTER WEATHER FORECAST

DECATUR, IL 3 hourly weather forecast

weather forecast created 8:00 PM EDT 6/ 8/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Tuesday
9 JUN 2026

1 AM

71°

71°

Mostly Cloudy

37%
RAIN
.01–.1 in

0% Thunder
( 29% severe)

S 8

93%

69°

Low 69°

4 AM

70°

70°

Mostly Cloudy

SSW 8

97%

69°

High 87°

7 AM

72°

72°

Mostly Cloudy

9%

0% Thunder
( 20% severe)

SW 9

93%

70°

Mostly Cloudy

10 AM

79°

82°

Mostly Cloudy

SW 10

82%

73°

1 PM

84°

91°

Mostly Cloudy

18%
RAIN
<.01 in

0% Thunder
( 43% severe)

SW 12

72%

74°

4 PM

87°

95°

Mostly Cloudy

SW 12

65%

74°

7 PM

86°

94°

Partly Cloudy

28%
RAIN
1–2 in

0% Thunder
( 37% severe)

SW 8

68%

74°

10 PM

78°

80°

Mostly Cloudy

SSW 7

85%

73°

Wednesday
10 JUN 2026

1 AM

75°

75°

Partly Cloudy

9%

0% Thunder
( 17% severe)

S 8

90%

72°

Low 72°

4 AM

74°

74°

Partly Cloudy

SSW 10

90%

71°

High 90°

7 AM

76°

77°

Partly Cloudy

0%

0% Thunder
( 8% severe)

SSW 12

85%

71°

Partly Cloudy

10 AM

84°

90°

Partly Cloudy

SW 15

70%

73°

1 PM

88°

96°

Partly Cloudy

4%

0% Thunder
( 42% severe)

SSW 17

61%

73°

4 PM

90°

96°

Partly Cloudy

SSW 18

54%

71°

7 PM

88°

93°

Clear

31%
RAIN
***

0% Thunder
( 28% severe)

SSW 17

55%

70°

10 PM

80°

83°

Partly Cloudy

SSW 15

69%

69°


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 74°	Low 75°	Low 71°	Low 59°	Low 59°
High 93°	High 92°	High 81°	High 84°	High 80°

Partly Cloudy 41% Rain	Mostly Cloudy 64% Rain	Overcast 54% Rain	Partly Cloudy 22% Rain	Partly Cloudy 18% Rain

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