What is the weather in Decatur, IL right now?

The latest observation from Decatur Airport was 46°F and clear, reported at 10/27/2026, 5:30 AM CDT.

What is the high temperature today in Decatur, IL?

The National Weather Service forecast for tuesday calls for a high near 74°F. Mostly Cloudy.

Will it rain in Decatur, IL in the next 24 hours?

The NWS hourly forecast does not show any hour with a 50% or higher chance of precipitation in the next 24 hours.

What is the 10-day forecast for Decatur, IL?

The first 7 days come from the National Weather Service forecast. Days 8 to 10 (Nov 3 to Nov 5) come from the NOAA National Blend of Models, with highs of 61°F to 66°F and up to a 49% chance of precipitation. Model guidance this far out often changes.

What time is sunrise and sunset in Decatur, IL today?

Sunrise is about 7:19 AM CDT and sunset is about 5:59 PM CDT (calculated for the center of the area, within a few minutes).

What is the normal October weather in Decatur, IL?

At Decatur Wtp, the 1991 to 2020 normal high in October is 65°F and the normal low is 46°F.

Checked Oct 27, 2026

Decatur, IL Weather

Current conditions, hourly and 10-day forecast from the National Weather Service. Times are local (CDT).

Decatur, IL current weather

46°F

Clear

H 74° / L 49°Feels like 46°

No rain expected in the next 12 hours

Observed at Decatur Airport (4.9 mi away), 10/27/2026, 5:30 AM CDT

Hourly forecast

NWS, updated 3:36 AM

Now51°
6 AM50°
7 AM50°
8 AM51°
9 AM55°
10 AM62°
11 AM66°
12 PM69°
1 PM71°
2 PM72°
3 PM72°
4 PM72°
5 PM73°
6 PM70°
7 PM66°
8 PM63°
9 PM60°
10 PM59°
11 PM58°
Wed12 AM56°
1 AM56°
2 AM55°
3 AM55°
4 AM54°
5 AM53°
6 AM53°
7 AM52°
8 AM54°
9 AM57°
10 AM63°
11 AM67°
12 PM72°
1 PM74°
2 PM75°
3 PM76°
4 PM77°
5 PM75°
6 PM73°
7 PM69°
8 PM65°
9 PM64°
10 PM62°
11 PM61°
Thu12 AM60°
1 AM59°
2 AM59°
3 AM58°
4 AM58°

10-day forecast

Tap a day for details

Today10/27Low 49°High 74°
Tuesday: Mostly cloudy, with a high near 74. South wind 3 to 9 mph.
Overnight: Mostly cloudy, with a low around 49. Southeast wind around 3 mph.
Mostly Cloudy
Wed10/28Low 56°High 77°
Wednesday: Sunny, with a high near 77. South southwest wind 3 to 10 mph.
Wednesday Night: Mostly clear, with a low around 56. South wind around 9 mph.
Sunny
Thu10/29Low 56°High 80°
Thursday: Sunny, with a high near 80. Southwest wind around 12 mph, with gusts as high as 16 mph.
Thursday Night: Partly cloudy, with a low around 56. North wind 1 to 7 mph.
Sunny
Fri10/3013% chance of precipitationLow 56°High 78°
Friday: Partly sunny, with a high near 78.
Friday Night: Mostly cloudy, with a low around 56.
Partly Sunny
Sat10/3145% chance of precipitationLow 55°High 73°
Saturday: A chance of rain showers after 7am. Mostly cloudy, with a high near 73.
Saturday Night: A chance of rain showers. Mostly cloudy, with a low around 55.
Chance Rain Showers
Sun11/135% chance of precipitationLow 55°High 73°
Sunday: A chance of rain showers. Partly sunny, with a high near 73.
Sunday Night: A chance of rain showers. Mostly cloudy, with a low around 55.
Chance Rain Showers
Mon11/250% chance of precipitationLow High 71°
Monday: A chance of rain showers before noon, then a chance of showers and thunderstorms. Partly sunny, with a high near 71.
Chance Rain Showers
Model blend
Tue11/3Model blend49% chance of precipitationLow 43°High 66°
Tuesday: Chance of rain. High near 66°. Low that night near 43°. About 0.22 in of precipitation.
Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.
Wed11/4Model blend40% chance of precipitationLow 39°High 62°
Wednesday: Chance of rain. High near 62°. Low that night near 39°. About 0.03 in of precipitation.
Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.
Thu11/5Model blend23% chance of precipitationLow 36°High 61°
Thursday: Mostly cloudy, slight chance of rain. High near 61°. Low that night near 36°.
Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

Forecast for 39.859, -88.956 from the NWS ILX office, updated 10/27/2026, 3:36 AM CDT · Official forecast on weather.gov

Days 8 to 10: NOAA National Blend of Models, station KDEC (Decatur Arpt, 5 mi), model run 10/27/2026, 3:00 AM CDT

Hazardous weather outlookIssued 10/27/2026, 4:50 AM CDT

This Hazardous Weather Outlook is for central Illinois, east central Illinois, southeast Illinois and west central Illinois.

Day one

Today and tonight.

No hazardous weather is expected at this time.

Days two through seven

Wednesday through Monday.

No hazardous weather is expected at this time.

Spotter information statement

Spotter activation is not anticipated through tonight.

Forecaster's discussionIssued 10/27/2026, 2:51 AM CDT

Key messages

- Above-normal warmth and mostly dry conditions are expected through Friday, with afternoon temperatures in the 70s to near 80 degrees, solidifying one of the warmest Octobers on record.

- Scattered, light showers carry a low chance (10-30%) Thursday into (20-40%) Friday, primarily near and north of I-72, offering no significant relief to ongoing dry conditions.

- A pattern shift is likely heading into the weekend and persisting into next week, increasing confidence in cooler, windier, and wetter conditions.

Discussion

Issued at 251 AM CDT Tue Oct 27 2026

This dry and warm pattern will continue for a few more days before true attempts to break the ridge down are made. Today, a shortwave will travel east across the area dampening the ridge a little before it builds back almost immediately. This shortwave should pass uneventful with no rain. Any rain activity should remain off to the north and west.

The next shortwave will cause a weak backdoor cold front to dip down into central IL on Thursday, then retreat back north as a warm front Friday, possibly bringing some very light rain north of I-72. However, it could also pass without any activity due to how dry our airmass is. As of now, there is a 10-30% chance of showers for daytime Thursday and a 20-40% chance of showers again Friday.

Another disturbance will follow closely behind Saturday, bringing a 30-50% chance for showers Saturday into Sunday. Amounts are forecast to be minimal (< 0.5 inch area wide). Whatever light rain manages to fall will do little to alleviate the ongoing dry stretch.

A much stronger low pressure system is shown to move through early next week. The Euro model is showing a deeper, stronger closed upper low (compared to the GFS and Canadian) traversing over the southern Plains. The Euro has the low center having a much more north track than the other, with the center moving into Iowa. The GFS has the upper low center moving across the Ohio Valley. The Euro depiction will affect central IL more than the GFS forecast. This system will bring the greatest chances for showers and thunderstorms to the area within the next week. There is a widespread 40-60% chance across central and southeastern IL.

Temperatures will continue to be above normal. Highs will be in the mid to upper 70s, nearing 80 in some places through Friday. Lows will be in the 50s. Temperatures will trend slightly cooler starting Saturday into next week. "Cooler" in this sense means temperatures will be in the low 70s for highs, still above normal. The CPC's 6-10 day, 8-14 day, and Week 3-4 outlooks are all still showing above normal temperatures.

Aviation

Issued at 1210 AM CDT Tue Oct 27 2026

A cold front is positioned near the I-74 corridor late tonight, being the focus for patchy fog development overnight. TEMPO groups were held at KBMI and KCMI for MVFR fog potential, though confidence is higher north of these locations. Aside from that, VFR conditions will prevail through the period with winds becoming southerly during the day.

Watches, warnings and advisories

None.

From the National Weather Service; may be delayed. Not for life-safety decisions. In an emergency, call 911.

Next 6 hours

NWS hourly forecast

Now51°Mostly Cloudy0%3 mph
6 AM50°Mostly Cloudy0%3 mph
7 AM50°Mostly Cloudy0%3 mph
8 AM51°Mostly Cloudy0%5 mph
9 AM55°Mostly Cloudy0%5 mph
10 AM62°Mostly Cloudy0%6 mph

Hourly details

Next 7 days: temperature chart, feels like, rain and snow amounts, sky cover, wind and gustsShow

Line: temperature °F. Bars: chance of precipitation.

TueNow51° 0% Sky 74%3
6 AM50° 0% Sky 76%3
7 AM50° 0% Sky 77%3
8 AM51° 0% Sky 75%5
9 AM55° 0% Sky 74%5
10 AM62° 0% Sky 72%6
11 AM66° 0% Sky 74%7g12
12 PM69° 0% Sky 77%7g12
1 PM71° 0% Sky 79%8g13
2 PM72° 0% Sky 81%9
3 PM72° 0% Sky 83%9
4 PM72° 0% Sky 85%9
5 PM73° 0% Sky 81%8
6 PM70° 0% Sky 78%6
7 PM66° 0% Sky 74%5
8 PM63° 0% Sky 64%3g8
9 PM60° 0% Sky 54%3g8
10 PM59° 0% Sky 44%3
11 PM58° 0% Sky 44%3g8
Wed 10/2812 AM56° 0% Sky 43%3g8
1 AM56° 0% Sky 43%3g9
2 AM55° 0% Sky 42%3g9
3 AM55° 1% Sky 40%3g9
4 AM54° 1% Sky 39%3g9
5 AM53° 1% Sky 36%3g9
6 AM53° 1% Sky 32%3g9
7 AM52° 0% Sky 29%3g9
8 AM54° 0% Sky 25%3g10
9 AM57° 0% Sky 20%5g10
10 AM63° 0% Sky 16%6g12
11 AM67° 0% Sky 20%7g13
12 PM72° 0% Sky 24%8g13
1 PM74° 0% Sky 28%9g14
2 PM75° 0% Sky 26%10
3 PM76° 0% Sky 23%10
4 PM77° 0% Sky 21%10
5 PM75° 0% Sky 18%9
6 PM73° 0% Sky 15%8g13
7 PM69° 0% Sky 12%7g12
8 PM65° 0% Sky 10%7g12
9 PM64° 0% Sky 9%7g13
10 PM62° 0% Sky 7%8g13
11 PM61° 0% Sky 7%8g13
Thu 10/2912 AM60° 0% Sky 6%9g14
1 AM59° 0% Sky 6%9g14
2 AM59° 0% Sky 9%9g14
3 AM58° 0% Sky 11%9g15
4 AM58° 0% Sky 14%9g15
5 AM57° 0% Sky 15%9g15
6 AM57° 0% Sky 15%10g15
7 AM56° 5% Sky 16%10g15
8 AM59° 5% Sky 13%10g15
9 AM63° 5% Sky 15%12
10 AM67° 5% Sky 17%12
11 AM71° 5% Sky 19%12
12 PM75° 5% Sky 21%12
1 PM77° 4% Sky 23%12
2 PM79° 4% Sky 23%12
3 PM80° 4% Sky 22%12
4 PM80° 4% Sky 22%12
5 PM78° 4% Sky 27%9
6 PM75° 4% Sky 33%7
7 PM72° 5% Sky 38%5
8 PM69° 5% Sky 39%3
9 PM66° 5% Sky 41%2
10 PM63° 5% Sky 42%1
11 PM61° 5% Sky 43%1
Fri 10/3012 AM61° 5% Sky 45%1
1 AM60° 2% Sky 46%1
2 AM59° 2% Sky 45%1
3 AM58° 2% Sky 44%2
4 AM58° 2% Sky 43%2
5 AM56° 2% Sky 47%2
6 AM56° 2% Sky 50%3
7 AM56° 9% Sky 54%3
8 AM59° 9% Sky 56%5
9 AM62° 9% Sky 59%5
10 AM66° 9% Sky 61%6
11 AM70° 9% Sky 63%6
12 PM73° 9% Sky 66%6
1 PM75° 13% Sky 68%6
2 PM77° 13% Sky 71%6
3 PM78° 13% Sky 73%7
4 PM78° 13% Sky 76%7
5 PM76° 13% Sky 79%7
6 PM73° 13% Sky 81%6
7 PM70° 8% Sky 84%6
8 PM67° 8% Sky 84%6
9 PM65° 8% Sky 84%6
10 PM63° 8% Sky 84%6
11 PM62° 8% Sky 84%6
Sat 10/3112 AM61° 8% Sky 84%5
1 AM60° 7% Sky 85%5
2 AM59° 7% Sky 85%5
3 AM59° 7% Sky 85%3g8
4 AM58° 7% Sky 85%3g8
5 AM57° 7% Sky 85%3g8
6 AM57° 7% Sky 85%3
7 AM57° 16% Sky 86%3
8 AM59° 16% Sky 86%5
9 AM61° 16% Sky 86%5
10 AM64° 16% Sky 86%6
11 AM66° 16% Sky 86%6
12 PM68° 16% Sky 86%7g12
1 PM70° 26% Sky 79%7g12
2 PM72° 26% Sky 79%7g12
3 PM73° 26% Sky 79%8
4 PM73° 26% Sky 79%8
5 PM72° 26% Sky 79%8
6 PM69° 26% Sky 79%8
7 PM67° 32% Sky 79%8
8 PM65° 32% Sky 79%8
9 PM63° 32% Sky 79%7g12
10 PM61° 32% Sky 79%7g12
11 PM60° 32% Sky 79%7g12
Sun 11/112 AM59° 32% Sky 79%6
1 AM59° 45%0.01"Sky 68%6
1 AM58° 45%0.01"Sky 68%6
2 AM58° 45%0.01"Sky 68%7
3 AM57° 45%0.01"Sky 68%7
4 AM56° 45%0.01"Sky 68%7
5 AM56° 45%0.01"Sky 68%6
6 AM57° 35%0.02"Sky 64%6
7 AM59° 35%0.02"Sky 64%6
8 AM61° 35%0.02"Sky 64%7
9 AM64° 35%0.02"Sky 64%7
10 AM66° 35%0.02"Sky 64%7
11 AM68° 35%0.02"Sky 64%7g12
12 PM70° 17%0.01"Sky 62%7g12
1 PM71° 17%0.01"Sky 62%7g12
2 PM72° 17%0.01"Sky 62%8
3 PM72° 17%0.01"Sky 62%8
4 PM71° 17%0.01"Sky 62%8
5 PM69° 17%0.01"Sky 62%7
6 PM67° 15% Sky 53%6
7 PM65° 15% Sky 53%6
8 PM62° 15% Sky 53%5
9 PM60° 15% Sky 53%5
10 PM59° 15% Sky 53%5
11 PM58° 15% Sky 53%3
Mon 11/212 AM58° 28%0.01"Sky 65%3
1 AM58° 28%0.01"Sky 65%3
2 AM57° 28%0.01"Sky 65%3g8
3 AM57° 28%0.01"Sky 65%5
4 AM57° 28%0.01"Sky 65%6
5 AM56° 28%0.01"Sky 65%6
6 AM57° 37%0.01"Sky 68%7
7 AM59° 37%0.01"Sky 68%8
8 AM61° 37%0.01"Sky 68%8
9 AM64° 37%0.01"Sky 68%9
10 AM66° 37%0.01"Sky 68%10
11 AM68° 37%0.01"Sky 68%10g15
12 PM69° 50%0.06"Sky 68%12
1 PM70° 50%0.06"Sky 68%13
2 PM71° 50%0.06"Sky 68%13g18

Temperature °F · chance of precipitation · amount in inches (T = trace) · sky cover · wind and gusts (g) in mph

NWS hourly forecast updated 10/27/2026, 3:36 AM CDT

Radar and satellite

National radar

NEXRAD (last 50 min) and GOES

Latest

Nearby hazards

Illinois hazards

Severe storm and flash flood outlooks, expected rain, river flooding and wildfires near this area

Severe storm outlook today:No thunderstorm risk area over this locationOutlook map
Excessive rainfall outlook (flash flood risk):Could not check the Weather Prediction Center outlook right now.
River gauges within 40 miles at or above flood stage: None reported
Active wildfires within 50 miles: None reported

Drought

By county

Macon County, week of 10/20/2026

100% of the county is abnormally dry. No drought.

Frequently asked questions

What is the weather in Decatur, IL right now?: The latest observation from Decatur Airport was 46°F and clear, reported at 10/27/2026, 5:30 AM CDT.
What is the high temperature today in Decatur, IL?: The National Weather Service forecast for tuesday calls for a high near 74°F. Mostly Cloudy.
Will it rain in Decatur, IL in the next 24 hours?: The NWS hourly forecast does not show any hour with a 50% or higher chance of precipitation in the next 24 hours.
What is the 10-day forecast for Decatur, IL?: The first 7 days come from the National Weather Service forecast. Days 8 to 10 (Nov 3 to Nov 5) come from the NOAA National Blend of Models, with highs of 61°F to 66°F and up to a 49% chance of precipitation. Model guidance this far out often changes.
What time is sunrise and sunset in Decatur, IL today?: Sunrise is about 7:19 AM CDT and sunset is about 5:59 PM CDT (calculated for the center of the area, within a few minutes).
What is the normal October weather in Decatur, IL?: At Decatur Wtp, the 1991 to 2020 normal high in October is 65°F and the normal low is 46°F.

Sun and moon

Local time, center of the area

Sunrise: 7:19 AM
Sunset: 5:59 PM
Daylight: 10 hr 40 min
Moon: Waning Gibbous 98% lit

First light (civil dawn): 6:51 AM
Last light (civil dusk): 6:27 PM
Moonrise: 6:36 PM
Moonset: 9:09 AM

Normal October weather

Climate

Normal October high 65°, low 46°, precipitation 3.41 in for the month. 1991 to 2020 normals at Decatur Wtp, 2 mi away.

Other places nearby

Data sources

National Weather Service APINOAA
National Blend of Models (NBM) text guidanceNOAA National Weather Service
Convective Outlooks and Storm ReportsNOAA Storm Prediction Center
Excessive Rainfall Outlook and Quantitative Precipitation ForecastsNOAA Weather Prediction Center
National Water Prediction ServiceNOAA National Weather Service
WFIGS Current Wildland Fire IncidentsNational Interagency Fire Center
UV Index Forecast (Envirofacts)U.S. Environmental Protection Agency and NOAA
AirNowU.S. Environmental Protection Agency
NWS HeatRisk (experimental)NOAA National Weather Service
U.S. Drought MonitorNational Drought Mitigation Center, USDA and NOAA
BEACON 2.0 Beach Advisory and Closing On-line NotificationU.S. Environmental Protection Agency
U.S. Climate Normals 1991-2020NOAA National Centers for Environmental Information
Tides & Currents (CO-OPS API)NOAA Center for Operational Oceanographic Products and Services
NEXRAD radar tilesIowa Environmental Mesonet, Iowa State University
GOES-East and GOES-West GeoColor imageryNOAA NESDIS Center for Satellite Applications and Research

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About this data

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