Airport information
- FAA LID
- 4WN4
- Coordinates
- 43.5091, -87.9384
- Elevation
- 851 ft MSL
- Sectional chart
- CHICAGO
- Airport use
- Private
- Control tower
- No
- ARTCC
- CHICAGO (ZAU)
- Flight service (FSS)
- GREEN BAY
- Segmented circle
- No
- Activated
- 2023/09
- Distance from city
- 2 NNE
Weather
METAR observed
Loading current weather…
TAF forecast
Loading forecast…
Sun & FAA night 2026-06-21
| Event | Local (CDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 04:35 AM | 09:35Z |
| Sunrise | 05:11 AM | 10:11Z |
| Sunset | 08:36 PM | 01:36Z |
| Evening civil twilight Loggable night begins | 09:12 PM | 02:12Z |
Plan a flight from 4WN4
Night operations
- Pilot-controlled lighting
- Usually keyed on CTAF 122.9 — confirm the click sequence in the Chart Supplement
FAA night windows (civil twilight, loggable night §1.1, currency §61.57) are in the live weather panel above.
Traffic pattern
- Landing
- Rwy 18
- Pattern
- right (turns right)
- TPA
- 1,900 ft MSL (≈1,000 AGL)
- CTAF
- 122.9
Enter the right downwind for Rwy 18 at 1,900 ft MSL (≈1,000 AGL) on a 45°. TPA estimated at 1,000 ft AGL (not charted for this field).
Runway 18/36
846 ft · Turf- Heading
- n/a
- Traffic pattern
- Right
- Heading
- n/a
- Traffic pattern
- Left
Headings shown are true (magnetic variation unavailable).
| Runway | Length | Your margin |
|---|---|---|
| 18/36 | 846 ft |
Communication frequencies
| Service | Frequency | Notes |
|---|---|---|
| CTAF | 122.9 |
Source: FAA NASR (current 28-day cycle).
Nearby navigation aids
| NavAid | Type | Freq | Radial / Dist magnetic |
|---|---|---|---|
| BJB · West Bend | VOR | 109.80 | r058° / 9.7 NM |
| FAH · Falls | VOR-DME | 110.00 | r196° / 16.1 NM |
| LJT · Timmerman | VOR-DME | 112.50 | r012° / 24.4 NM |
| BAE · Badger | VORTAC | 116.40 | r031° / 28 NM |
| MTW · Manitowoc | VOR-DME | 111.00 | r199° / 38.8 NM |
| OSH · Oshkosh | VORTAC | 111.80 | r135° / 39.4 NM |
VFR sectional
No published instrument procedures or Chart Supplement for 4WN4. VFR sectional link above.
Ownership & management
Nearby airports
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 4WN4 in a full tool: METAR/TAF decoder, crosswind calculator, sun & night times, or the density altitude calculator. Planning from here? Find the nearest airport with fuel or an approach, or check whether an IFR alternate is required.
About 4WN4
Geis Field (4WN4) is an airport in Fredonia, WI, at 851 ft MSL. It has 1 runway, the longest 846 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for 4WN4, refreshed from the Aviation Weather Center and FAA NASR.
Does 4WN4 have a control tower?
No. Geis Field is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM on the Comms & NavAids tab.
What is the longest runway at 4WN4?
Geis Field has 1 runway; the longest is 846 ft. See the Runways tab for headings, surface, and lighting.
Where is 4WN4?
Geis Field is in Fredonia, WI, at an elevation of 851 ft MSL. Coordinates: 43.5091, -87.9384.
Fly out of 4WN4 often?
Save 4WN4 as your home base in the SkyReady app for a one-tap Go/No-Go readiness brief, weather alerts, and automatic FAA currency — free to log.