Temperature
54 F at 2 AM; 74 F at its warmest, 7 PM Thursday, and 54 F at its coolest, 2 AM.
- Now
- 54F
- 2 AM
- Highest
- 74F
- 7 PM Thursday
- Lowest
- 54F
- 2 AM
How it is measured: Stevenson screen and siting, Field Book FB-INS-009
Decatur Airport, Illinois
Medium airport in Macon County, Illinois54°
56°/43°
Light rain·
Feels like 54°·Fresh breeze 19 mph WNW
Now. Decatur Airport is 54° and light rain at 3 AM. The dew point is 51°, so the air feels dry and comfortable. Fresh breeze from the west-northwest at 19 mph, gusting to 31 mph.
Today and tonight. It warms to about 56° by 2 PM. Tonight falls to about 35° by 7 AM, under a mostly clear sky. Frost can form on the ground in sheltered spots. No rain is expected for the rest of the day.
The week. The warmest day ahead is Thursday, near 78°, and the coolest tomorrow, near 58°. The days ahead look dry. Frost is possible tomorrow morning, a low of 35°.
The sky tonight. The sun sets at 6:15 PM. The Moon is a waxing crescent, 33% lit, and sets at 10:11 PM. The next full Moon is Sunday, Oct 25. After dark, look for Saturn, bright in the east-southeast. A planet shines with a steady light where the stars around it twinkle. The Orionids meteor shower is active, peaking around Oct 21: at its peak, up to about 20 meteors an hour can be seen from a dark site. The sky is forecast to stay clear: a good night to look up. The day is 11 hours 9 minutes long, 3 minutes shorter than yesterday.
0UV Low
10Air quality
86%Humidity
100%Cloud
Now
3:00 AM
54feels54
12%
19mph
Today
Oct 16
5643
38%
21mph
Sat
Oct 17
5835
14mph
Sun
Oct 18
6634
clear day
Mon
Oct 19
7237
overcast
Tue
Oct 20
7540
overcast
Wed
Oct 21
7743
overcast
Thu
Oct 22
7847
overcast
54°
56°43°
58°35°
66°34°
72°37°
75°40°
77°43°
78°47°
As of 3:00 AM in Decatur Airport, Illinois.
Air quality
The air at Decatur Airport
Index 10, good, led by ozone. Read at 2 AM from its reporting area, Decatur (IL), 5 miles off.
10Good
- Fine particles (PM2.5)9Good-
- Ozone10Good-
The days ahead
Good each day through Mon Oct 19, led by fine particles. Yesterday measured 36, good.
GoodModerate
- 36YesterdayOct 15
- GoodTodayOct 16
- GoodSatOct 17
- GoodSunOct 18
- GoodMonOct 19
Smoke, the next 41 hours
No smoke near the ground through Sat 7 PM.
Precipitation
What has fallen at Decatur Airport
0.39 in in the last 24 hours, and none in the 2 days before, to Fri 1 AM. Measured by radar and rain gauges, as water.
- Last 24 hours
- 0.39in
- Last 3 days
- 0.39in
Visibility
How far you can see at Decatur Airport, the next 41 hours
Visibility stays 8 miles or more through Sat 7 PM, lowest 9 miles Fri 4 PM.
F
Now, today, and the week
Weather instrument stations by state
Airfield
- Code
- DEC
- ICAO
- KDEC
- IATA
- DEC
- Field elevation
- 682 ft
- Serves
- Decatur
- Kind
- Medium airport
- Scheduled service
- Yes
- Its own instrument
- DEC
- Wind now
- From 300° at 18 mph, read 16 Oct, 01:54
Runways
| Runway | Length | Width | Surface | Heading, true | Wind along it now | Crosswind now |
|---|---|---|---|---|---|---|
| 06 / 24 | 8,496 ft | 150 ft | Asphalt and concrete | 59° / 239° | 9 mph head, on 24 | 16 mph from the right |
| 12 / 30 | 6,799 ft | 150 ft | Asphalt and concrete | 119° / 299° | 18 mph head, on 30 | None |
| 18 / 36 | 5,298 ft | 150 ft | Asphalt | 179° / 359° | 9 mph head, on 36 | 15 mph from the left |
Measured here
What the airfield's own instrument measured, the last 24 hours
Every hour from Decatur (DEC), Decatur Airport's own instrument, measure by measure, on the field's own clock.
Humidity and dew point
A dew point of 48 F, the air 80% saturated; the humidity ran from 80% at 2 AM to 97% at 2 PM Thursday.
- Dew point now
- 48F
- 2 AM
- Humidity now
- 80%
- Humidity, range
- 80 to 97%
How it is measured: Humidity variables, Field Book FB-WAT-002
Wind
17 mph from the west northwest at 2 AM; at its strongest 18 mph, 12 AM, with a gust of 39 mph at 10 PM Thursday.
- Now
- 17mph
- from the west northwest
- Strongest
- 18mph
- 12 AM
- Highest gust
- 39mph
- 10 PM Thursday
How it is measured: Coriolis as geometry, Field Book FB-ENG-008
Pressure
30.04 inHg at 2 AM, rising 0.13 inHg over 3 hours; 0.04 inHg lower than a day before.
- Now
- 30.04inHg
- 2 AM
- 3 hours
- +0.13inHg
- rising
- 24 hours
- -0.04inHg
How it is measured: Hydrostatic balance, Field Book FB-ENG-003
Visibility
Down to 1 mile at 1 PM Thursday; 10 miles or more now.
- Now
- 10+mi
- Lowest
- 1mi
- 1 PM Thursday
- Hours under a mile
- 0
How it is measured: Fog types, Field Book FB-WAT-020
Cloud base
The lowest cloud base came down to 400 ft at 2 PM Thursday; a base was reported in 22 of the hours.
- Lowest base now
- -
- Lowest in 24 hours
- 400ft
- 2 PM Thursday
- Hours with a base reported
- 22
How it is measured: Cloud classification, Field Book FB-SKY-001
Precipitation
0.20 in measured in the gauge, the most, 0.05 in, in the hour to 2 AM.
- Last 24 hours
- 0.20in
- Wettest hour
- 0.05in
- 2 AM
- Hours with some
- 10
How it is measured: ASOS, Field Book FB-INS-002
Decatur: every reading, the last 7 days, 30 days and the year, and how well it reports
What is measuring near here
The 6 instruments nearest Decatur Airport, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.0 miles away.
measured now4 instruments
DecaturDEC
At an airfield/0.0 mi away/679 ft/3 ft below here
temp, wind, gust, visibility, precip, pressure
I-72 @ US-36/US-51SS0231
Beside a road/9.7 mi away/-/- ft from here
temp, pavement temp, wind, visibility, precip
Champaign 9 SW54808
At a climate reference station/30.2 mi away/700 ft/18 ft above here
temp, humidity, wind, solar, precip
Bondville CRNBNDI2
At a river or reservoir gauge/36.8 mi away/682 ft/level with here
temp, wind, gust, humidity, pressure
measured daily2 instruments
Decatur 3.2 EIL-MA-9
In a volunteer observer's own ground/1.4 mi away/653 ft/29 ft below here
precip, snowfall, snow depth
Sangamon River AT Decatur WTPDECI2
At a water treatment plant/4.6 mi away/643 ft/39 ft below here
snowfall, snow depth, precip, high, low
What the snow tracker reads here
Every instrument in this state
-
Snow on the ground
Elsewhere in Illinois
23 places, each with its own forecast and its own instruments.
AuroracityBloomingtoncityCarbondalecityChampaigncityChicagocityDanvillecityDecaturcityElgincityGalenatownIllinois RiverfeatureJolietcityLake ShelbyvillefeatureMolinecityMount VernoncityNapervillecityPeoriacityQuincycityRockfordcityShawnee National ForestfeatureSpringfieldcityStarved RockfeatureVilla Oliviaski areaWaukegancity
Near Decatur Airport
The nearest places, each with its own forecast and the instruments nearest it.
- Long Creekvillage, 2 mi
- Mount Zionvillage, 4 mi
- Decaturcity, 5 mi
- Oreanavillage, 7 mi
- Elwincommunity, 7 mi
- Cerro Gordovillage, 8 mi
- LaPlacecommunity, 8 mi
- Forsythvillage, 8 mi
- Dalton Cityvillage, 9 mi
- Lake Citycommunity, 10 mi
- Argentavillage, 11 mi
- Harristownvillage, 11 mi
Airports near Decatur Airport
- Taylorville Municipal AirportTAZ, 32 mi
- Logan County AirportAAA, 33 mi
- University of Illinois Willard AirportCMI, 34 mi
- Coles County Memorial AirportMTO, 40 mi
- Abraham Lincoln Capital AirportSPI, 43 mi
- Central Illinois Regional Airport at Bloomington-NormalBMI, 44 mi
- Rantoul National Aviation Center - Frank Elliot fieldTIP, 50 mi
- Effingham County Memorial Airport1H2, 56 mi