DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

4:54 PM CDT JUN 14, 2026
Broken Clouds
70°F
Feels Like: 70°F
Dewpoint: 50°F
Rel. Hum.: 49%
Visibility: 10 miles
Wind: N at 15 mph, gusts to 29
Pressure: 29.97 inches
Last 72 hours

Local Area Snow Depth

Illinois Current Weather

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DECATUR, IL 62521
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
THIS AFTERNOON
Mostly sunny. Near steady temperature in the lower 70s. Northwest winds 15 to 20 mph with gusts up to 30 mph.
TONIGHT
Mostly clear. Cooler with lows in the lower 50s. Northwest winds 10 to 15 mph, diminishing to around 5 mph after midnight.
MONDAY
Sunny. Highs in the mid 70s. West winds 5 to 10 mph.
MONDAY NIGHT
Mostly clear. Lows in the mid 50s. Southwest winds 5 to 10 mph.
TUESDAY
Mostly sunny. Showers likely with a chance of thunderstorms in the afternoon. Highs in the upper 70s. Southwest winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 70 percent.
TUESDAY NIGHT
Partly cloudy. Lows in the mid 50s.
WEDNESDAY
Mostly sunny. A chance of showers in the morning, then showers likely with a chance of thunderstorms in the afternoon. Breezy with highs around 80. Chance of rain 70 percent.
WEDNESDAY NIGHT
Showers with thunderstorms likely in the evening, then a chance of showers after midnight. Locally heavy rainfall possible in the evening. Windy with lows in the mid 60s. Chance of rain 90 percent.
THURSDAY
Partly sunny. A chance of showers and thunderstorms in the morning. Highs in the upper 70s. Chance of rain 40 percent.
THURSDAY NIGHT THROUGH FRIDAY NIGHT
Mostly clear. Lows in the upper 50s. Highs in the upper 70s.
SATURDAY
Mostly sunny. Highs in the lower 80s.

Visible Weather Satellite
DECATUR, IL 62521
Infrared Weather Satellite
DECATUR, IL 62521
NEXRAD Weather Radar
DECATUR, IL 62521

DECATUR, IL 3 hourly weather forecast

weather forecast created  8:00 AM EDT  6/14/2026
Sunday
14 JUN 2026
DECATUR, IL 62521 weather forecast Day 1, 12 hours 1 PM 71° 71° Partly Cloudy 0%

0% Thunder
( 4% severe)
NW   17 59% 56°
High 73° DECATUR, IL 62521 weather forecast Day 1, 15 hours 4 PM 72° 72° Partly Cloudy NW   20 51% 53°
Partly Cloudy



DECATUR, IL 62521 weather forecast Day 1, 18 hours 7 PM 69° 69° Clear 0%

0% Thunder
( 1% severe)
NNW   14 53% 51°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 10 PM 61° 60° Partly Cloudy NNW   7 70% 51°
Monday
15 JUN 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 1 AM 56° 56° Clear 0%

0% Thunder
( 1% severe)
NNW   3 80% 50°
Low 52° DECATUR, IL 62521 weather forecast Day 2, 3 hours 4 AM 54° 54° Clear NW   2 83% 49°
High 74° DECATUR, IL 62521 weather forecast Day 2, 6 hours 7 AM 57° 58° Clear 0%

0% Thunder
( 1% severe)
  CALM 80% 51°

Partly Cloudy



DECATUR, IL 62521 weather forecast Day 2, 9 hours 10 AM 67° 67° Clear W   6 56% 51°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 1 PM 71° 71° Partly Cloudy 0%

0% Thunder
( 4% severe)
WNW   8 46% 49°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 4 PM 73° 73° Partly Cloudy W   9 43% 49°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 7 PM 72° 72° Partly Cloudy 0%

0% Thunder
( 2% severe)
W   8 48% 51°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 10 PM 62° 62° Partly Cloudy SW   6 65% 50°
Tuesday
16 JUN 2026
DECATUR, IL 62521 weather forecast Day 3, 0 hours 1 AM 59° 58° Partly Cloudy 1%

0% Thunder
( 6% severe)
SSW   7 72% 50°
Low 55° DECATUR, IL 62521 weather forecast Day 3, 3 hours 4 AM 58° 56° Partly Cloudy SSW   8 75% 50°
High 76° DECATUR, IL 62521 weather forecast Day 3, 6 hours 7 AM 60° 58° Partly Cloudy 29%
RAIN
<.01 in
0% Thunder
( 19% severe)
SSW   10 78% 53°

Mostly Cloudy

Rain Likely

DECATUR, IL 62521 weather forecast Day 3, 9 hours 10 AM 71° 71° Partly Cloudy SW   14 61% 57°
DECATUR, IL 62521 weather forecast Day 3, 15 hours 1 PM 72° 72° Mostly Cloudy 55%
RAIN
.5–1 in
0% Thunder
( 47% severe)
SW   18 59% 57°
DECATUR, IL 62521 weather forecast Day 3, 18 hours 4 PM 73° 73° Mostly Cloudy SW   18 59% 58°
DECATUR, IL 62521 weather forecast Day 3, 21 hours 7 PM 71° 71° Partly Cloudy     WSW   14 61% 57°

DECATUR, IL extended weather forecast

Wednesday
17 JUN 2026
Thursday
18 JUN 2026
Friday
19 JUN 2026
Saturday
20 JUN 2026
Sunday
21 JUN 2026
Low 60° Low 69° Low 58° Low 57° Low 58°
High 80° High 78° High 76° High 76° High 76°
DECATUR, IL 62521 weather forecast Day 4 DECATUR, IL 62521 weather forecast Day 5 DECATUR, IL 62521 weather forecast Day 6 DECATUR, IL 62521 weather forecast Day 7 <!--SEARCHED_TOWN_NAME--> weather forecast Day 8
Overcast
68% Rain
Overcast
72% Rain
Partly Cloudy
30% Rain
Mostly Cloudy
26% Rain
Overcast
35% Rain
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