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WeatherLive › Illinois › Decatur

Decatur, IL Weather

Today Hourly 10-Day Weekend Monthly Radar Air Quality Climate
Current WeatherDecatur · 9:10 AM CDT
87° | 53°
73°F
Feels like 65°
Sunny
WindNW 23 mph · Gusts 28 mph
Precip15% · –
Humidity72% · Dew point 63°
UV index9 Very high
Air Quality24 Good
Pressure30.27 inHg
Visibility6 mi
Sunrise / Sunset6:09 AM · 7:50 PM · 13h 41m

Weather map — Decatur

Full radar →
Now
73°
6%
23 mph
10:00
76°
3%
23 mph
11:00
83°
3%
24 mph
12:00
85°
2%
24 mph
13:00
87°
2%
24 mph
14:00
86°
2%
25 mph
15:00
53°
27%
26 mph
16:00
53°
27%
25 mph
17:00
53°
27%
27 mph
18:00
53°
28%
26 mph
19:00
53°
28%
26 mph
20:00
53°
25%
25 mph
21:00
53°
28%
26 mph
22:00
54°
29%
26 mph
23:00
53°
29%
28 mph
00:00
53°
29%
27 mph
01:00
54°
29%
28 mph
02:00
54°
28%
27 mph
03:00
54°
29%
27 mph
04:00
54°
29%
26 mph
05:00
54°
29%
27 mph
06:00
54°
29%
28 mph
07:00
54°
29%
27 mph
08:00
54°
28%
27 mph

Today · Mon 8/17

High 87°
15% / –

Mostly cloudy. Winds NW at 28 mph.

Tonight · Mon 8/17

Low 53°
28% / –

Mostly cloudy. Winds NW at 26 mph.

Tomorrow · Tue 8/18

55° | 53°
75% / 0.05 in

Mostly cloudy. Winds NW at 31 mph.

7-day trend

Decatur · temperature + precipitation

10-day forecast

Updated 9:10 AM

Details & indices

Wind
23 mph NW
Gusts 28 mph
Humidity
72%
Dew point 63°
Pressure
30.27 inHg
Rising
UV index
9 — Very high
High today
Air Quality
Good
AQI 24 · US EPA
Allergy
None detected
—
Visibility
6 mi
Clear view
Allergy — Decatur

🌿 Conditions right now

View all →
Birch
None
Grass
None
Oak
None
Alder
None
Hazel
None
Mugwort
None
Ragweed
None

Sun & moon

Sunrise6:09 AM
Sunset7:50 PM
Length of day13h 41m
Moonrise11:37 AM
Moonset10:06 PM
Moon phase🌒 Waxing Crescent · 26%
Next full moonAug 27 Sturgeon Moon
Latitude39.8403°N
Longitude-88.9548°E

Water temps nearby

View all →
No beaches within 50 miles
🌤️No rain expected in the next 90 minutes
Now+30+60+90 min
Minute-by-minute precip · HRRR nowcast

Daily planner

computed from today's forecast
Laundry day
Fair
Line-drying weather
Grilling
Great
Fire up the grill
Running
Poor
Lace up outside
Patio
Fair
Dinner outdoors
Nearby places in {{REGION}}
Chicago
Mostly cloudy
65°
Aurora
Partly cloudy
68° 🌤️
Rockford
—
— 🌤️
Joliet
—
— 🌤️
Naperville
—
—
Data sources · Monday, August 17
Where the Decatur forecast comes from
This page blends NOAA/NWS model guidance with global ensembles for the 10-day outlook, air quality and alerts. Data refreshes every hour, current conditions every 15 minutes. Coordinates: 39.8403°N, -88.9548°.
NBM + global weather models
Updated: 9:10 AM
ZIP codes in Decatur
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62514
Decatur
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62521
Decatur
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62522
Decatur
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62523
Decatur
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62524
Decatur
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62525
Decatur
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62526
Decatur
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62532
Decatur
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62537
Decatur
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62551
Decatur
Weather in Decatur
Over the next 10 days Decatur tops out around 87° (Monday) and dips to 49° on the coolest night (Wednesday). Models drop roughly 0.80 in of precipitation across the stretch — watch Monday (91%). Hold onto the patio furniture Tuesday: gusts could hit 46 mph. No active NWS alerts at the moment — quiet on the hazards front. Right now Decatur is about 11° cooler than nearby Evansville. Longer view: variable mid-latitude weather in every season.
Decatur, IL · Elev 673 ft · 39.84°N, 88.95°W · Illinois · Forecast computed for these exact coordinates
Powered by NWS/NOAA guidance, multi-model forecasts and official environmental feeds · NOAA/NWS · EPA AirNow · MET Norway · global models
Updated: 9:10 AM