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 CST DEC 17, 2025
Overcast 43°F
Feels Like:	35°F
Dewpoint:	36°F
Rel. Hum.:	76%
Visibility:	10 miles
Wind:	SSE at 16 mph
Pressure:	29.80 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 TONIGHT
Partly cloudy late this evening, then becoming cloudy. A chance of drizzle. Breezy with lows in the mid 30s. Temperature rising into the upper 40s. South winds 10 to 15 mph with gusts up to 25 mph, increasing to 15 to 25 mph with gusts up to 40 mph.

THURSDAY
Showers with a slight chance of thunderstorms in the morning, then showers in the afternoon. Breezy with highs in the lower 50s. Temperature falling to around 40 in the afternoon. South winds around 25 mph with gusts up to 45 mph, becoming west with gusts up to 35 mph in the afternoon. Chance of rain 90 percent.

THURSDAY NIGHT
Mostly cloudy. A chance of snow in the evening. Little or no snow accumulation. Blustery and much cooler with lows around 17. West winds 20 to 25 mph with gusts up to 40 mph. Chance of snow 40 percent. Wind chill values as low as 1 below.

FRIDAY
Sunny. Much cooler with highs in the lower 30s. West winds 15 to 20 mph with gusts up to 30 mph, becoming southwest around 10 mph in the afternoon. Wind chill values as low as zero in the morning.

FRIDAY NIGHT
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the mid 20s. Temperature rising into the lower 30s after midnight. South winds 15 to 20 mph with gusts up to 30 mph.

SATURDAY
Mostly cloudy in the morning, then becoming partly sunny. Not as cool with highs in the upper 40s.

SATURDAY NIGHT
Partly cloudy in the evening, then clearing. Lows in the lower 20s.

SUNDAY
Sunny, cooler with highs in the upper 30s.

SUNDAY NIGHT AND MONDAY
Mostly cloudy. Lows in the mid 20s. Highs in the lower 40s.

MONDAY NIGHT THROUGH WEDNESDAY
Mostly cloudy. Lows in the mid 30s. Highs in the lower 50s.

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 PM EST 12/17/2025

DAY/DATE &
WEATHER FORECAST SUMMARY

Thursday
18 DEC 2025

12 AM

42°

34°

Mostly Cloudy

39%
RAIN
<.01 in

0% Thunder
( 3% severe)

S 15

93%

40°

Low 41°

3 AM

47°

40°

Mostly Cloudy

S 18

89%

44°

High 53°

6 AM

48°

41°

Mostly Cloudy

96%
RAIN
***

0% Thunder
( 10% severe)

S 21

93%

46°

Mostly Cloudy

Rain

Breezy

9 AM

51°

45°

Mostly Cloudy

S 22

89%

48°

12 PM

50°

43°

Mostly Cloudy

78%
RAIN
***

0% Thunder
( 3% severe)

WSW 21

89%

47°

3 PM

45°

38°

Mostly Cloudy

W 17

76%

38°

6 PM

38°

29°

Mostly Cloudy

5%

0% Thunder
( 1% severe)

W 16

76%

31°

9 PM

30°

17°

Mostly Cloudy

WNW 20

70%

22°

Friday
19 DEC 2025

12 AM

24°

9°

Mostly Cloudy

1%

0% Thunder
( 0% severe)

WNW 22

62%

14°

Low 17°

3 AM

21°

5°

Mostly Cloudy

WNW 21

61%

11°

High 31°

6 AM

19°

3°

Partly Cloudy

1%

0% Thunder
( 0% severe)

WNW 18

67%

11°

Partly Cloudy

9 AM

21°

7°

Clear

WNW 15

61%

11°

12 PM

26°

15°

Clear

1%

0% Thunder
( 0% severe)

W 12

54%

13°

3 PM

30°

21°

Partly Cloudy

WSW 10

50%

15°

6 PM

27°

17°

Partly Cloudy

1%

0% Thunder
( 0% severe)

S 10

63%

17°

9 PM

28°

17°

Partly Cloudy

S 14

66%

19°


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 20°	Low 22°	Low 22°	Low 25°	Low 32°
High 26°	High 43°	High 42°	High 43°	High 47°

Mostly Cloudy 9% Snow	Partly Cloudy 7% Rain/Snow	Clear 15% Snow	Mostly Cloudy 9% Rain/Snow	Overcast 16% Rain

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