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William E. Koenig Airport

01IS · Dow, IL · 670 ft elevation

Airport information

FAA LID
01IS
Coordinates
39.0162, -90.3182
Elevation
670 ft MSL

Detailed FAA facility data isn't available for this airport.

Weather

METAR observed

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TAF forecast

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Sun & FAA night 2026-06-20

EventLocal (CDT)UTC
Morning civil twilight
Loggable night ends
05:03 AM10:03Z
Sunrise05:35 AM10:35Z
Sunset08:30 PM01:30Z
Evening civil twilight
Loggable night begins
09:02 PM02:02Z
Loggable night (§1.1)
09:02 PM → 05:03 AM
Night currency (§61.57)
09:30 PM → 04:35 AM

Plan a flight from 01IS

Runway 09/27

1,300 ft × 100 ft · TURF
09
Heading
n/a
27
Heading
n/a

Headings shown are true (magnetic variation unavailable).

Nearby navigation aids

NavAidTypeFreqRadial / Dist magnetic
STL · St LouisVORTAC117.40r038° / 12.1 NM
CSX · CardinalVOR-DME116.45r007° / 15.9 NM
TOY · TroyVORTAC116.00r308° / 25 NM
SKE · ScottTACAN112.20r320° / 35.7 NM
FTZ · ForistellVORTAC110.80r052° / 36.1 NM

No published instrument procedures or Chart Supplement for 01IS. VFR sectional link above.

No published services or facility detail for 01IS.

Weather is live from the Aviation Weather Center; airport facility data is from the FAA NASR (28-day cycle). For planning and education only; always verify against official sources. Open 01IS in a full tool: METAR/TAF decoder, crosswind calculator, sun & night times, or the density altitude calculator.