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 MAR 31, 2026
Overcast Thunder Rain Mist NA
Feels Like:	NA
Dewpoint:	NA
Rel. Hum.:	NA%
Visibility:	5 miles
Wind:	N at 5 mph
Pressure:
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 2025 Hurricanes	DECATUR, IL 62521 Weather Forecast	Snowfall Forecast pages Snow Depth pages

REST OF TONIGHT
Showers with thunderstorms likely. Much cooler with lows in the mid 40s. Northwest winds 10 to 15 mph, becoming northeast. Chance of rain near 100 percent.

WEDNESDAY
A chance of thunderstorms. Showers. Much cooler with highs in the upper 50s. Northeast winds around 15 mph with gusts up to 25 mph. Chance of rain near 100 percent.

WEDNESDAY NIGHT
A chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Lows in the mid 50s. Temperature rising to around 60 after midnight. East winds 15 to 20 mph. Chance of rain 50 percent.

THURSDAY
Mostly cloudy. A chance of showers in the morning, then showers with a chance of thunderstorms in the afternoon. Windy and not as cool with highs in the mid 70s. South winds 20 to 30 mph with gusts up to 45 mph. Chance of rain 90 percent.

THURSDAY NIGHT
Showers likely in the evening, then partly cloudy with a chance of showers after midnight. Breezy with lows in the mid 50s. Southwest winds 20 to 25 mph with gusts up to 35 mph, diminishing to 10 to 15 mph with gusts up to 25 mph after midnight. Chance of rain 70 percent.

FRIDAY
Partly sunny. A chance of showers in the afternoon. Highs in the upper 70s. Chance of rain 50 percent.

FRIDAY NIGHT
A chance of thunderstorms. Showers. Lows in the lower 50s. Chance of rain 90 percent.

SATURDAY
Showers likely with a chance of thunderstorms in the morning, then a chance of showers in the afternoon. Breezy, cooler with highs in the mid 60s. Chance of rain 70 percent.

SATURDAY NIGHT
Mostly cloudy with a chance of rain showers in the evening, then partly cloudy after midnight. Much cooler with lows in the mid 30s. Chance of rain 50 percent.

SUNDAY
Mostly sunny. Cooler with highs around 50.

SUNDAY NIGHT AND MONDAY
Mostly clear. Lows in the lower 30s. Highs in the upper 50s.

MONDAY NIGHT AND TUESDAY
Partly cloudy. Lows in the upper 30s. Highs in the mid 60s.

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 7:00 AM EST 3/31/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Tuesday
31 MAR 2026

12 PM

78°

79°

Mostly Cloudy

42%
RAIN
.5–1 in

0% Thunder
( 31% severe)

SW 21

48%

57°

High 79°

3 PM

78°

79°

Mostly Cloudy

SW 18

50%

58°

Mostly Cloudy

Rain Likely

6 PM

73°

73°

Mostly Cloudy

86%
RAIN
***

0% Thunder
( 52% severe)

SW 12

57%

57°

9 PM

65°

65°

Mostly Cloudy

WSW 10

78%

58°

Wednesday
1 APR 2026

12 AM

58°

56°

Mostly Cloudy

86%
RAIN
***

0% Thunder
( 42% severe)

NNE 10

87%

54°

Low 47°

3 AM

52°

48°

Mostly Cloudy

NE 13

89%

49°

High 62°

6 AM

48°

42°

Mostly Cloudy

81%
RAIN
***

0% Thunder
( 22% severe)

NE 14

89%

45°

Mostly Cloudy

Rain Likely

9 AM

48°

42°

Mostly Cloudy

ENE 14

89%

45°

12 PM

53°

49°

Mostly Cloudy

71%
RAIN
***

0% Thunder
( 33% severe)

ENE 13

80%

47°

3 PM

57°

54°

Mostly Cloudy

E 13

77%

50°

6 PM

58°

55°

Mostly Cloudy

43%
RAIN
.5–1 in

0% Thunder
( 23% severe)

E 13

80%

52°

9 PM

58°

55°

Mostly Cloudy

E 14

83%

53°

Thursday
2 APR 2026

12 AM

60°

58°

Mostly Cloudy

34%
RAIN
.25–.5 in

0% Thunder
( 12% severe)

SE 14

87%

56°

Low 56°

3 AM

62°

60°

Mostly Cloudy

S 16

84%

57°

High 76°

6 AM

63°

61°

Mostly Cloudy

40%
RAIN
.25–.5 in

0% Thunder
( 15% severe)

S 18

87%

59°

Mostly Cloudy

Rain Likely

Windy

9 AM

68°

68°

Mostly Cloudy

S 23

78%

61°

12 PM

72°

72°

Mostly Cloudy

82%
RAIN
***

0% Thunder
( 35% severe)

S 25

68%

61°

3 PM

73°

73°

Mostly Cloudy

S 25

62%

59°

6 PM

69°

69°

Mostly Cloudy

SSW 21

68%

58°


DECATUR, IL extended weather forecast
Friday 3 APR 2026	Saturday 4 APR 2026	Sunday 5 APR 2026	Monday 6 APR 2026	Tuesday 7 APR 2026
Low 57°	Low 57°	Low 37°	Low 33°	Low 39°
High 78°	High 63°	High 51°	High 56°	High 56°

Mostly Cloudy 39% Rain	Overcast 80% Rain	Mostly Cloudy 27% Rain	Clear 12% Rain	Partly Cloudy 22% Rain

WEATHER SELECT BOX EXAMPLES:

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STATE WEATHER MAP:

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