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 16, 2026
Overcast 73°F
Feels Like:	73°F
Dewpoint:	66°F
Rel. Hum.:	79%
Visibility:	10 miles
Wind:	SSW at 17 mph
Pressure:
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
Showers and thunderstorms likely. Highs in the upper 70s. South winds 10 to 15 mph, becoming southwest this afternoon. Chance of rain 70 percent.

TONIGHT
Mostly cloudy. A chance of showers and thunderstorms, mainly in the evening. Lows in the lower 60s. Southeast winds 5 to 10 mph. Chance of rain 40 percent.

SUNDAY
Mostly sunny. Highs in the mid 80s. South winds 10 to 15 mph, increasing to around 20 mph in the afternoon.

SUNDAY NIGHT
Mostly clear. Lows in the upper 60s. South winds around 20 mph with gusts up to 30 mph.

MONDAY
Partly sunny. A chance of showers in the morning, then showers likely with a chance of thunderstorms in the afternoon. Breezy with highs in the mid 80s. South winds 20 to 25 mph with gusts up to 35 mph. Chance of rain 70 percent.

MONDAY NIGHT
Mostly cloudy in the evening, then becoming partly cloudy. A chance of showers and thunderstorms. Breezy with lows in the upper 60s. Chance of rain 50 percent.

TUESDAY
Partly sunny. A chance of showers in the morning, then showers with a chance of thunderstorms in the afternoon. Breezy with highs in the mid 80s. Chance of rain 80 percent.

TUESDAY NIGHT
Showers likely with a chance of thunderstorms in the evening, then a chance of showers after midnight. Cooler with lows in the upper 50s. Chance of rain 70 percent.

WEDNESDAY AND WEDNESDAY NIGHT
Mostly cloudy. Highs around 70. Lows in the upper 40s.

THURSDAY THROUGH FRIDAY
Partly cloudy. Highs in the lower 70s. Lows around 50.

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 5/15/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Saturday
16 MAY 2026

1 AM

68°

68°

Mostly Cloudy

37%
RAIN
1–2 in

0% Thunder
( 30% severe)

S 13

73%

59°

Low 66°

4 AM

67°

67°

Partly Cloudy

S 14

75%

59°

High 81°

7 AM

67°

67°

Mostly Cloudy

55%
RAIN
***

0% Thunder
( 33% severe)

ESE 14

81%

61°

Mostly Cloudy

Rain Likely

10 AM

73°

73°

Mostly Cloudy

S 14

73%

64°

1 PM

76°

78°

Mostly Cloudy

27%
RAIN
.25–.5 in

0% Thunder
( 26% severe)

SW 15

66%

64°

4 PM

77°

79°

Mostly Cloudy

SW 12

62%

63°

7 PM

74°

74°

Mostly Cloudy

27%
RAIN
.1–.25 in

0% Thunder
( 25% severe)

S 8

66%

62°

10 PM

68°

68°

Partly Cloudy

SE 8

84%

63°

Sunday
17 MAY 2026

1 AM

66°

66°

Partly Cloudy

15%
RAIN
.1–.25 in

0% Thunder
( 20% severe)

SSE 8

84%

61°

Low 63°

4 AM

65°

65°

Partly Cloudy

SSE 10

87%

61°

High 85°

7 AM

65°

65°

Partly Cloudy

1%

0% Thunder
( 9% severe)

SSE 13

87%

61°

Partly Cloudy

Breezy

10 AM

76°

78°

Partly Cloudy

S 16

66%

64°

1 PM

82°

84°

Partly Cloudy

0%

0% Thunder
( 12% severe)

S 20

56%

65°

4 PM

84°

85°

Partly Cloudy

S 22

48%

62°

7 PM

81°

81°

Partly Cloudy

0%

0% Thunder
( 11% severe)

S 18

47%

59°

10 PM

74°

74°

Clear

S 18

57%

58°


DECATUR, IL extended weather forecast
Monday 18 MAY 2026	Tuesday 19 MAY 2026	Wednesday 20 MAY 2026	Thursday 21 MAY 2026	Friday 22 MAY 2026
Low 68°	Low 70°	Low 59°	Low 48°	Low 49°
High 86°	High 81°	High 65°	High 69°	High 72°

Partly Cloudy 34% Rain	Overcast 72% Rain	Overcast 62% Rain	Overcast 33% Rain	Partly Cloudy 24% Rain

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