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 MAY 20, 2026
Overcast 61°F
Feels Like:	59°F
Dewpoint:	52°F
Rel. Hum.:	72%
Visibility:	10 miles
Wind:	NE at 13 mph
Pressure:	30.20 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 2025 Hurricanes	DECATUR, IL 62521 Weather Forecast	Snowfall Forecast pages Snow Depth pages

THIS AFTERNOON
Partly sunny. Cooler with highs in the upper 60s. Northeast winds around 10 mph.

TONIGHT
Partly cloudy in the evening, then clearing. Lows in the upper 40s. Northeast winds 10 to 15 mph.

THURSDAY
Mostly sunny. Highs in the upper 60s. East winds 10 to 15 mph with gusts up to 25 mph.

THURSDAY NIGHT
Mostly cloudy. A chance of showers after midnight. Lows in the lower 50s. East winds 10 to 15 mph. Chance of rain 30 percent.

FRIDAY
Showers in the morning, then showers likely with a chance of thunderstorms in the afternoon. Highs in the upper 60s. East winds 10 to 15 mph. Chance of rain 80 percent.

FRIDAY NIGHT
A chance of showers in the evening. Mostly cloudy. Lows in the upper 50s. Chance of rain 40 percent.

SATURDAY AND SATURDAY NIGHT
Mostly cloudy. Highs in the mid 70s. Lows in the upper 50s.

SUNDAY
Mostly cloudy in the morning, then becoming partly sunny. A chance of showers. Highs in the upper 70s. Chance of rain 40 percent.

SUNDAY NIGHT
Mostly cloudy. A chance of showers after midnight. Lows around 60. Chance of rain 30 percent.

MEMORIAL DAY
Mostly cloudy with a chance of showers in the morning, then partly sunny in the afternoon. Highs around 80. Chance of rain 40 percent.

MONDAY NIGHT
Mostly cloudy. Lows in the lower 60s.

TUESDAY
Partly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 40 percent.

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 5/20/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Wednesday
20 MAY 2026

1 PM

63°

62°

Mostly Cloudy

1%

0% Thunder
( 2% severe)

NNE 12

60%

49°

High 67°

4 PM

66°

66°

Mostly Cloudy

NNE 12

52%

48°

Mostly Cloudy

7 PM

63°

61°

Partly Cloudy

2%

0% Thunder
( 3% severe)

NE 14

54%

46°

10 PM

54°

50°

Partly Cloudy

NE 13

61%

41°

Thursday
21 MAY 2026

1 AM

49°

45°

Partly Cloudy

2%

0% Thunder
( 1% severe)

NE 10

68%

39°

Low 46°

4 AM

48°

43°

Partly Cloudy

NE 12

74%

40°

High 69°

7 AM

50°

45°

Partly Cloudy

1%

0% Thunder
( 1% severe)

ENE 13

80%

44°

Partly Cloudy

10 AM

59°

56°

Partly Cloudy

E 15

62%

46°

1 PM

65°

65°

Partly Cloudy

2%

0% Thunder
( 2% severe)

E 16

50%

46°

4 PM

68°

68°

Partly Cloudy

E 16

47%

47°

7 PM

65°

65°

Mostly Cloudy

1%

0% Thunder
( 4% severe)

E 14

52%

47°

10 PM

60°

58°

Mostly Cloudy

ENE 13

60%

46°

Friday
22 MAY 2026

1 AM

57°

54°

Mostly Cloudy

16%
RAIN
<.01 in

0% Thunder
( 3% severe)

E 13

67%

46°

Low 53°

4 AM

55°

51°

Mostly Cloudy

ENE 14

69%

45°

High 68°

7 AM

54°

50°

Mostly Cloudy

54%
RAIN
***

0% Thunder
( 6% severe)

ENE 15

74%

46°

Mostly Cloudy

Rain Likely

10 AM

59°

56°

Mostly Cloudy

E 15

75%

51°

1 PM

62°

60°

Mostly Cloudy

73%
RAIN
***

0% Thunder
( 15% severe)

E 15

81%

56°

4 PM

65°

65°

Mostly Cloudy

E 14

81%

59°

7 PM

65°

65°

Mostly Cloudy

ENE 13

84%

60°


DECATUR, IL extended weather forecast
Saturday 23 MAY 2026	Sunday 24 MAY 2026	Monday 25 MAY 2026	Tuesday 26 MAY 2026	Wednesday 27 MAY 2026
Low 54°	Low 62°	Low 59°	Low 62°	Low 61°
High 76°	High 78°	High 79°	High 79°	High 78°

Overcast 37% Rain	Overcast 68% Rain	Overcast 39% Rain	Overcast 59% Rain	Overcast 51% Rain

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