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 AM CDT MAY 17, 2026
Clear 75°F
Feels Like:	75°F
Dewpoint:	68°F
Rel. Hum.:	79%
Visibility:	10 miles
Wind:	S at 21 mph, gusts to 30
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 2025 Hurricanes	DECATUR, IL 62521 Weather Forecast	Snowfall Forecast pages Snow Depth pages

REST OF TODAY
Mostly cloudy late this morning, then becoming partly sunny. Breezy with highs in the mid 80s. South winds 15 to 25 mph.

TONIGHT
Mostly clear. Lows in the upper 60s. South winds 15 to 20 mph with gusts up to 30 mph.

MONDAY
Partly sunny with a chance of showers and thunderstorms in the morning, then mostly cloudy with showers and thunderstorms likely in the afternoon. Breezy with highs in the lower 80s. South winds 15 to 25 mph with gusts up to 35 mph. Chance of rain 60 percent.

MONDAY NIGHT
Mostly cloudy in the evening, then becoming partly cloudy. A chance of showers and thunderstorms. Lows in the upper 60s. South winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 50 percent.

TUESDAY
A chance of thunderstorms. Showers, breezy with highs in the mid 80s. Southwest winds 15 to 25 mph with gusts up to 35 mph. Chance of rain near 100 percent.

TUESDAY NIGHT
Mostly cloudy. A chance of showers in the evening. Cooler with lows in the mid 50s. Chance of rain 50 percent.

WEDNESDAY AND WEDNESDAY NIGHT
Mostly cloudy. Highs in the upper 60s. Lows in the upper 40s.

THURSDAY
Mostly sunny. Highs in the upper 60s.

THURSDAY NIGHT AND FRIDAY
Mostly cloudy. Lows in the lower 50s. Highs in the lower 70s.

FRIDAY NIGHT AND SATURDAY
Mostly 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 5/16/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Sunday
17 MAY 2026

1 AM

67°

67°

Mostly Cloudy

13%
RAIN
<.01 in

0% Thunder
( 22% severe)

SSE 10

84%

62°

Low 65°

4 AM

66°

66°

Mostly Cloudy

S 12

84%

61°

High 86°

7 AM

67°

67°

Mostly Cloudy

4%

0% Thunder
( 5% severe)

SSE 14

84%

62°

Mostly Cloudy

Breezy

10 AM

76°

78°

Mostly Cloudy

S 16

66%

64°

1 PM

83°

84°

Mostly Cloudy

1%

0% Thunder
( 12% severe)

S 21

53%

64°

4 PM

85°

85°

Partly Cloudy

S 23

45%

61°

7 PM

80°

81°

Clear

2%

0% Thunder
( 11% severe)

S 20

49%

59°

10 PM

73°

73°

Clear

S 18

57%

57°

Monday
18 MAY 2026

1 AM

71°

71°

Partly Cloudy

6%

0% Thunder
( 18% severe)

S 17

57%

55°

Low 68°

4 AM

70°

70°

Partly Cloudy

S 18

61%

56°

High 84°

7 AM

70°

70°

Partly Cloudy

56%
RAIN
***

0% Thunder
( 19% severe)

S 18

71%

60°

Mostly Cloudy

Rain Likely

Breezy

10 AM

78°

80°

Mostly Cloudy

SSW 21

67%

66°

1 PM

79°

81°

Mostly Cloudy

67%
RAIN
***

0% Thunder
( 59% severe)

SSW 21

69%

68°

4 PM

79°

81°

Mostly Cloudy

S 21

64%

66°

7 PM

77°

79°

Mostly Cloudy

32%
RAIN
>2 in

0% Thunder
( 26% severe)

S 20

67%

65°

10 PM

73°

73°

Partly Cloudy

S 18

76%

65°


DECATUR, IL extended weather forecast
Tuesday 19 MAY 2026	Wednesday 20 MAY 2026	Thursday 21 MAY 2026	Friday 22 MAY 2026	Saturday 23 MAY 2026
Low 68°	Low 50°	Low 47°	Low 59°	Low 53°
High 79°	High 64°	High 73°	High 78°	High 76°

Overcast 77% Rain	Mostly Cloudy 23% Rain	Mostly Cloudy 25% Rain	Overcast 38% Rain	Mostly Cloudy 41% Rain

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