WI84 Weather Johnstown Center Airport

Janesville, WisconsinElevation 925 ftSmall airport

OFF-FIELD REFERENCE

Nearest report: KJVL · 10 NM SW · 2 min old

Ceiling 25,000 ft, visibility 10 SM.

No on-field report, so no field flight category. Conditions at the field may differ.

OFF-FIELD REFERENCE · KJVL

WIND

Calm

no steady wind

VISIBILITY

10 SM

16.1 km

CEILING

25,000 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 from 190° at 4 kt, visibility 10 SM, temperature 16C. Treat this as supplemental, not an aviation observation. Forecast suggests tonight mostly cloudy, low near 49F, 1% chance of precipitation. Key risks: thunderstorms in the forecast.

PILOT WEATHER NOTES

Thunderstorms in the forecastWeather.gov

Thursday: Chance Showers And Thunderstorms. Watch for developing convection and plan alternates.

Day	Conditions	Temp F	Wind	Gusts	Precip	Pilot note
Tonight	Mostly Cloudy	49	NW 4 kt	–	1%
Monday	Mostly Cloudy	60/46	NE 9 kt	–	10%
Tuesday	Partly Sunny	67/53	SE 9 kt	–	5%
Wednesday	Mostly Sunny	72/55	S 9 kt	–	33%
Thursday	Chance Showers And Thunderstorms	72/51	SW 9 kt	–	33%	Thunderstorms in the forecast
Friday	Chance Rain Showers	71/54	SE 9 kt	–	36%
Saturday	Chance Rain Showers	69/53	S 9 kt	–	56%
Sunday	Chance Rain Showers	67	SW 9 kt	–	36%

Source: National Weather Service (office MKX). Forecast issued 0147Z.

Radar

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

OUR HEADSET PICK · NOT SPONSORED

David Clark DC ONE-X

Not sponsored, just the headset we'd buy ourselves: the DC ONE-X, with hybrid noise canceling, Bluetooth, and 30+ hour battery. And David Clark's A+ customer service is the real reason we recommend them.

Visit David Clark

RUNWAYS & WIND

Crosswind calculator

No runway layout is available for WI84. Enter a runway number or heading to estimate wind components.

RUNWAYS

Runway detail & declared distances

1 runway · longest 2,800 ft

N/S

Dimensions

2,800 x 100 ft

Surface

Turf

RWY N

Traffic patternLeft

RWY S

Traffic patternLeft

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

FIELD CONDITIONS

Field elevation

925 ft MSL

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

DAYLIGHT & NIGHT

Sun & logging windows

Sunset

2257Z 5:57 PM

Sunrise

1221Z 7:21 AM

Loggable night

2326Z (6:26 PM local) → 1152Z (6:52 AM local)

end of evening to start of morning civil twilight

Position lights required

2257Z (5:57 PM local) → 1221Z (7:21 AM local)

sunset to sunrise (91.209)

Night passenger currency

2357Z (6:57 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

Johnstown Center Airport is in Janesville, Wisconsin. Field elevation 925 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT

OwnershipPrivately owned

UsePrivate use

TypeSmall airport

ManagerELIZABETH MOORE

Manager phone608-295-6347

AttendedUNATNDD

CHARTS & AIRSPACE

ICAO / IATAWI84

SectionalCHICAGO

Center (ARTCC)CHICAGO

Flight service (AFSS)GREEN BAY

RegionWisconsin

CountryUnited States

Coordinates42.6896, -88.8410

Distance from city9 NM NE

SERVICES & LIGHTING

Control towerNon-towered

AIRCRAFT ACTIVITY

WI84 traffic patterns

2026-07-24 to 2026-10-05, 6 days observed · data 2026-10-23

Low confidence

TRAFFIC VOLUME (30-DAY)

AVG LANDINGS/DAY

1.7

AVG OPS/DAY

Operations trend (3 days)

Busiest day: Mon · Busiest month: Sep

FLEET MIX

Turboprop 100%

Mostly turboprop aircraft.

TOP AIRCRAFT TYPES

›AT8T (Turboprop) · ~2 landings/mo

›AT5T (Turboprop) · ~1 landings/mo

LIKELY BASED AIRCRAFT

Low-confidence estimate

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

›AT8T (Turboprop)

›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

WI84 has no on-field report. Nearest reporting station: KJVL (10 NM SW, VFR).

KJVL Southern Wisconsin Regional Airport

10 NM SW

VFR

KRFD Chicago Rockford International Airport

32 NM S

VFR

KUES Waukesha County Airport

34 NM NE

VFR

KMSN Dane County Regional Truax Field

35 NM NW

VFR

KENW Kenosha Regional Airport

41 NM E

VFR

KFEP Albertus Airport

42 NM SW

VFR

AIRPORT REMARKS

Operational remarks

›PLEASE LEAVE A MESSAGE AND WE WILL GET BACK TO YOU. HAVE TO SCREEN MOST CALLS DUE TO HOW MUCH SPAM FROM BEING A PUBLIC NUMBER.

›NO SNOW REMOVAL.

›AGRICULTURE SPRAYING IN JULY & AUG.

›FOR CD CTC CHICAGO ARTCC AT 630-906-8921.

›DEER IN VCNTY DURING FALL.

›W SIDE OF RWY HAS 2 FENCE POSTS PUT BACK IN ON EDGE OF STRIP/PROPERTY LN.

›PLEASE LEAVE A MESSAGE AND WE WILL GET BACK TO YOU. HAVE TO SCREEN MOST CALLS DUE TO HOW MUCH SPAM FROM BEING A PUBLIC NUMBER.

OFFICIAL LINKS & SOURCES

↗Search NOTAMs (official FAA NOTAM Search)

↗WI84 on OurAirports

FREQUENTLY ASKED

Does WI84 have a METAR?

No on-field METAR is issued for WI84. This page uses the nearest reporting station as a reference.

Does WI84 have a TAF?

No TAF is issued directly for WI84. Use the nearest TAF-issuing field as a planning reference.

What is the field elevation at WI84?

WI84 sits at 925 ft MSL, which factors into the density-altitude estimate on this page.

Is this an official preflight weather briefing for WI84?

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.