WxDecoder

9IL4 Weather Thompson Airport

Steward, IllinoisElevation 790 ftSmall airport
OFF-FIELD REFERENCE
Nearest report: KRFD · 23 NM N · 23 min old
Ceiling 23,000 ft, visibility 10 SM.
No on-field report, so no field flight category. Conditions at the field may differ.
OFF-FIELD REFERENCE · KRFD
WIND
360@3
steady
VISIBILITY
10 SM
16.1 km
CEILING
23,000 ft
lowest BKN/OVC
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 10.4C. Treat this as supplemental, not an aviation observation. Forecast suggests monday mostly cloudy, high near 67F, low near 47F, 4% chance of precipitation. Key risks: thunderstorms in the forecast.

PILOT WEATHER NOTES
Thunderstorms in the forecastWeather.gov
Thursday: Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms. Watch for developing convection and plan alternates.
DayConditionsTemp FWindGustsPrecipPilot note
Monday Mostly Cloudy 67/47 NE 9 kt 17 kt 4%
Tuesday Mostly Cloudy 70/53 SE 9 kt – 3%
Wednesday Partly Sunny 73/55 S 9 kt – 18%
Thursday Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms 75/53 SW 9 kt – 35% Thunderstorms in the forecast
Friday Chance Rain Showers 73/53 E 4 kt – 30%
Saturday Chance Showers And Thunderstorms 71/53 SE 9 kt – 41%
Sunday Chance Rain Showers 70 SSE 4 kt – 33%

Source: National Weather Service (office LOT). Forecast issued 0916Z.

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 9IL4. Enter a runway number or heading to estimate wind components.
RUNWAYS

Runway detail & declared distances

1 runway · longest 1,385 ft

18/36
Dimensions
1,385 x 100 ft
Surface
Turf
RWY 18
Traffic patternRight
RWY 36

Runway data from the FAA NASR dataset (effective 2026-06-11). Verify with the current Chart Supplement and NOTAMs.

FIELD CONDITIONS

Field elevation

Field elevation
790 ft MSL

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

DAYLIGHT & NIGHT

Sun & logging windows

Sunset
2300Z 6:00 PM
Sunrise
1221Z 7:21 AM
Loggable night
2328Z (6:28 PM local) → 1152Z (6:52 AM local)
end of evening to start of morning civil twilight
Position lights required
2300Z (6:00 PM local) → 1221Z (7:21 AM local)
sunset to sunrise (91.209)
Night passenger currency
0000Z (7:00 PM local) → 1121Z (6:21 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

Thompson Airport is in Steward, Illinois. Field elevation 790 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
OwnershipPrivately owned
UsePrivate use
TypeSmall airport
ManagerROSIE THOME
Manager phone815-508-7187
AttendedUNATNDD
CHARTS & AIRSPACE
ICAO / IATA9IL4
SectionalCHICAGO
Center (ARTCC)CHICAGO
Flight service (AFSS)KANKAKEE
RegionIllinois
CountryUnited States
Coordinates41.8072, -89.0481
Distance from city3 NM SW
SERVICES & LIGHTING
Control towerNon-towered
AIRCRAFT ACTIVITY

9IL4 traffic patterns

2026-07-23 to 2026-07-23, 1 days observed · data 2026-10-23

Insufficient confidence
TRAFFIC VOLUME (30-DAY)
AVG LANDINGS/DAY
2
AVG OPS/DAY
4
Operations trend (1 days)

Busiest day: Thu · Busiest month: Jul

FLEET MIX
Turboprop 100%

Mostly turboprop aircraft.

TOP AIRCRAFT TYPES
›AT5T (Turboprop) · ~2 landings/mo
LIKELY BASED AIRCRAFT
Low-confidence estimate

Aircraft likely based near this airport (estimate), mostly turboprop aircraft.

›AT5T (Turboprop)

This is an estimate based on repeated flight patterns, not registration data. Do not rely on it to identify specific aircraft or owners.

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

9IL4 has no on-field report. Nearest reporting station: KRFD (23 NM N, VFR).

KRFD Chicago Rockford International Airport
23 NM N
VFR
KARR Aurora Municipal Airport
26 NM E
VFR
KVYS Illinois Valley Regional Airport Walter A Duncan Field
28 NM S
VFR
KSQI Whiteside County Airport - Joseph H Bittorf Field
28 NM W
VFR
KFEP Albertus Airport
36 NM NW
VFR
KDPA Dupage Airport
36 NM E
VFR
AIRPORT REMARKS

Operational remarks

›PROVIDED CLEAR 20:1 APCHS, CLEAR OBSTACLE FREE ZONE, AND TRAFFIC PATTERNS ARE FLOWN TO THE WEST TO DECONFLICT WITH TPA 3IL7 ARPT.
›100 FT POWERLINE 1940 FT S OF RY 36.
›FOR CD CTC CHICAGO ARTCC AT 630-906-8921.
OFFICIAL LINKS & SOURCES
↗Search NOTAMs (official FAA NOTAM Search)
↗9IL4 on OurAirports
FREQUENTLY ASKED
Does 9IL4 have a METAR?
No on-field METAR is issued for 9IL4. This page uses the nearest reporting station as a reference.
Does 9IL4 have a TAF?
No TAF is issued directly for 9IL4. Use the nearest TAF-issuing field as a planning reference.
What is the field elevation at 9IL4?
9IL4 sits at 790 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for 9IL4?
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.