WxDecoder

28LL Weather Williamson Airport

Westervelt, IllinoisElevation 630 ftSmall airport
OFF-FIELD REFERENCE
Nearest report: KDEC · 22 NM N · 56 min old
No ceiling, visibility 10 SM.
No on-field report, so no field flight category. Conditions at the field may differ.
OFF-FIELD REFERENCE · KDEC
WIND
Calm
no steady wind
VISIBILITY
10 SM
16.1 km
CEILING
None
no BKN/OVC layer
FORECAST & PILOT NOTES · SUPPLEMENTAL

Extended forecast and pilot notes

No aviation METAR is published for this airport. The nearest National Weather Service station reports wind calm, visibility 10 SM, temperature 13.3C. Treat this as supplemental, not an aviation observation. Forecast suggests tonight mostly cloudy, low near 49F, 0% chance of precipitation. Key risks: no significant hazards are highlighted right now, but always confirm against an official briefing.

DayConditionsTemp FWindGustsPrecipPilot note
Tonight Mostly Cloudy 49 SSE 2 kt – 0%
Monday Partly Sunny 77/48 SSW 3 kt – 4%
Tuesday Partly Sunny 76/49 SSE 6 kt – 0%
Wednesday Mostly Sunny 78/52 S 7 kt – 0%
Thursday Sunny 81/53 SSW 8 kt – 5%
Friday Mostly Sunny 80/56 S 7 kt – 10%
Saturday Chance Rain Showers 75/57 S 7 kt – 68%
Sunday Chance Rain Showers 74 SW 7 kt – 49%

Source: National Weather Service (office ILX). Forecast issued 0149Z.

Radar

Radar data: NOAA/NWS MRMS composite reflectivity. For situational awareness only, not a substitute for an official weather briefing.

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RUNWAYS & WIND
Crosswind calculator
No runway layout is available for 28LL. Enter a runway number or heading to estimate wind components.
RUNWAYS

Runway detail

18/36
Dimensions
1,900 x 70 ft
Surface
TURF
FIELD CONDITIONS

Field elevation

Field elevation
630 ft MSL

Density and pressure altitude need a current temperature and altimeter from the METAR.

DAYLIGHT & NIGHT

Sun & logging windows

Sunset
2302Z 6:02 PM
Sunrise
1216Z 7:16 AM
Loggable night
2330Z (6:30 PM local) → 1149Z (6:49 AM local)
end of evening to start of morning civil twilight
Position lights required
2302Z (6:02 PM local) → 1216Z (7:16 AM local)
sunset to sunrise (91.209)
Night passenger currency
0002Z (7:02 PM local) → 1116Z (6:16 AM local)
1 hr after sunset to 1 hr before sunrise (61.57(b))

FAA definitions, shown in Zulu with airport-local time. Verify for your operation.

AIRPORT INFORMATION

Facility & services

Williamson Airport is in Westervelt, Illinois. Field elevation 630 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
TypeSmall airport
CHARTS & AIRSPACE
ICAO / IATA28LL
RegionIllinois
CountryUnited States
Coordinates39.4603, -88.8684
SERVICES & LIGHTING
Control towerNon-towered
AIRCRAFT ACTIVITY

28LL traffic patterns

2026-07-15 to 2026-09-08, 2 days observed · data 2026-10-23

Insufficient confidence
TRAFFIC VOLUME (30-DAY)
AVG LANDINGS/DAY
1
AVG OPS/DAY
2
Operations trend (1 days)

Busiest day: Wed · Busiest month: Sep

FLEET MIX
Turboprop 50%Piston single 50%

Mostly turboprop aircraft.

TOP AIRCRAFT TYPES
›AT8T (Turboprop) · ~1 landings/mo
›ST75 (Piston single) · ~1 landings/mo
Data limitations (4)
›ADS-B coverage is incomplete; counts are an observed lower bound, not official totals.
›Some aircraft do not transmit usable ADS-B and are not counted.
›Aircraft types and based estimates are inferred and may be wrong.
›This is not official ATC, FAA, or airport data.
NEARBY AIRPORTS

Weather reference stations

28LL has no on-field report. Nearest reporting station: KDEC (22 NM N, VFR).

KDEC Decatur Airport
22 NM N
VFR
KMTO Coles County Memorial Airport
27 NM E
VFR
KSPI Abraham Lincoln Capital Airport
44 NM NW
VFR
KCMI University of Illinois Willard Airport
44 NM NE
VFR
KSLO Salem–Leckrone Airport
49 NM S
VFR
KOLY Olney Noble Airport
55 NM SE
VFR
OFFICIAL LINKS & SOURCES
↗Search NOTAMs (official FAA NOTAM Search)
↗28LL on OurAirports
FREQUENTLY ASKED
Does 28LL have a METAR?
No on-field METAR is issued for 28LL. This page uses the nearest reporting station as a reference.
Does 28LL have a TAF?
No TAF is issued directly for 28LL. Use the nearest TAF-issuing field as a planning reference.
What is the field elevation at 28LL?
28LL sits at 630 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for 28LL?
No. wxdecoder.com is for education and situational awareness only. It is not an official weather briefing or a substitute for official sources, NOTAM review, and pilot judgment.
This app is for aviation weather education, training, and situational awareness only. It is not a substitute for an official weather briefing, approved flight-planning software, flight service, dispatch procedures, current FAA regulations, or pilot judgment. Always verify weather with official sources before flight.