KHYI METAR & TAF San Marcos Regional Airport

San Marcos, TexasElevation 597 ftMedium airport

CURRENT STATUS

VFR7 min old

Ceiling 7,000 ft, visibility 10 SM.

FLIGHT CATEGORY

VFR

ceiling & visibility

WIND

100@6

steady

VISIBILITY

10 SM

16.1 km

CEILING

7,000 ft

lowest BKN/OVC

DENSITY ALT

1,814 ft

+1,217 ft vs field

CURRENT METAR

Decoded observation

Observed 1856Z (1:56 PM local) · 7 min old

KHYI is currently VFR. Winds are from the east at 6 knots. Visibility is 10 statute miles. The ceiling is 7,000 feet AGL.

WIND

100° at 6 kt

Steady.

VISIBILITY

10 statute miles

16.1 km, good.

CEILING & SKY

Ceiling 7,000 ft

Lowest broken or overcast layer.

TEMP / DEWPOINT

26°C / 14°C

79°F / 57°F. 12°C spread.

ALTIMETER

30.15 inHg

1021 hPa, above standard.

WEATHER & HAZARDS

No significant hazards

No precipitation or obscuration reported.

Codes in this report: OVC RMK AO2

Hover or tap any group for a plain-English explanation.

REMARKS: DECODED

AO2

automated station with a precipitation discriminator (can tell rain from snow)

SLP205

sea-level pressure 1020.5 hPa

T02610144

precise temperature 26.1°C, dew point 14.4°C

station needs maintenance

SUGGESTED RISK · TRAINING USE

Suggested risk level: Low

›No TAF available for this airport.

A suggested risk level for training and situational awareness only, not a go/no-go authority. Verify with official sources and apply your personal minimums.

FORECAST & PILOT NOTES · SUPPLEMENTAL

Extended forecast and pilot notes

Current aviation conditions show flight category VFR, wind from 100° at 6 kt, visibility 10 SM, ceiling 7,000 ft. Forecast suggests this afternoon slight chance showers and thunderstorms, high near 80F, low near 61F, 18% chance of precipitation. Key risks: thunderstorms in the forecast. Note: the NWS forecast for now reads "Slight Chance Showers And Thunderstorms" but the current METAR shows none of it; the observation and forecast differ, so trust the METAR for current conditions.

PILOT WEATHER NOTES

Thunderstorms in the forecastWeather.gov

This Afternoon: Slight Chance Showers And Thunderstorms. Watch for developing convection and plan alternates.

Day	Conditions	Temp F	Wind	Gusts	Precip	Pilot note
This Afternoon	Slight Chance Showers And Thunderstorms	80/61	SE 9 kt	–	18%	Thunderstorms in the forecast
Wednesday	Chance Showers And Thunderstorms	86/65	E 4 kt	–	27%
Thursday	Chance Showers And Thunderstorms	82/63	ESE 4 kt	–	26%
Friday	Slight Chance Rain Showers	80/62	SE 9 kt	17 kt	23%
Saturday	Slight Chance Showers And Thunderstorms then Partly Sunny	85/63	SSE 4 kt	–	15%
Sunday	Partly Sunny	86/65	ESE 4 kt	–	6%
Monday	Slight Chance Rain Showers then Partly Sunny	86/61	S 13 kt	–	31%

Note: the NWS forecast for now reads "Slight Chance Showers And Thunderstorms" but the current METAR shows none of it; the observation and forecast differ, so trust the METAR for current conditions.

Source: National Weather Service (office EWX). Forecast issued 1903Z.

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

3 runways · crosswind ranking

ON-FIELD METAR

READING THE BARB · SWIPE FOR MORE →

Calm

5 kt

10 kt

15 kt

20 kt

25 kt

30 kt

35 kt

40 kt

45 kt

50 kt

65 kt

75 kt

100 kt

105 kt

Half feather = 5 kt, full = 10 kt, filled pennant = 50 kt; add them up. The staff points the direction the wind blows from.

WIND USED

100° at 6 kt

Components computed from the current on-field METAR wind.

RECOMMENDED

RWY 086 kt headwind · 1 kt crosswind

RUNWAYS BY WIND · best end

HEAD

6 kt

CROSS

1 kt R

BEST

HEAD

5 kt

CROSS

3 kt L

HEAD

1 kt

CROSS

6 kt L

HEAD

1 kt tail

CROSS

6 kt R

HEAD

5 kt tail

CROSS

3 kt R

HEAD

6 kt tail

CROSS

1 kt L

Components are estimates from the current METAR wind and runway heading. Verify with the Chart Supplement and NOTAMs.

RUNWAYS

Runway detail & declared distances

3 runways · longest 6,330 ft

17/35

Dimensions

5,214 x 100 ft

Surface

Asphalt (good)

Edge lights

MED

RWY 17178°T

VGSIPAPI (P2L)

Traffic patternLeft

RWY 35358°T

Traffic patternLeft

13/31

Dimensions

5,601 x 100 ft

Surface

Asphalt (good)

Edge lights

MED

RWY 13133°T

ILSILS

Approach lightsMALS

VGSIPAPI (P2L)

Traffic patternLeft

RWY 31313°T

VGSIPAPI (P2L)

Traffic patternLeft

08/26

Dimensions

6,330 x 100 ft

Surface

Asphalt (good)

Edge lights

MED

RWY 0888°T

Traffic patternLeft

RWY 26268°T

Traffic patternLeft

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

FIELD CONDITIONS

Performance & density altitude

Density altitude

1,814 ft

Pressure altitude

367 ft

Field elevation

597 ft MSL

Temperature

26°C (79°F)

Dewpoint

14°C (57°F)

Altimeter

30.15 inHg

Density altitude estimates how the aircraft performs versus standard atmosphere. Higher density altitude reduces climb performance and increases takeoff distance.

DAYLIGHT & NIGHT

Sun & logging windows

Sunset

2348Z 6:48 PM

Sunrise

1242Z 7:42 AM

Loggable night

0013Z (7:13 PM local) → 1217Z (7:17 AM local)

end of evening to start of morning civil twilight

Position lights required

2348Z (6:48 PM local) → 1242Z (7:42 AM local)

sunset to sunrise (91.209)

Night passenger currency

0048Z (7:48 PM local) → 1142Z (6:42 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

San Marcos Regional Airport is in San Marcos, Texas. Field elevation 597 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT

OwnershipPublicly owned

UseOpen to the public

TypeMedium airport

ManagerCASSIDY BERENATO

Manager phone512-216-6039

AttendedDaily, 0700–2100

CHARTS & AIRSPACE

ICAO / IATAKHYI

SectionalSAN ANTONIO

Center (ARTCC)HOUSTON

Flight service (AFSS)SAN ANGELO

RegionTexas

CountryUnited States

Coordinates29.8927, -97.8630

Distance from city31 NM S

SERVICES & LIGHTING

FuelJet A+

Control towerTowered

Field lightingSee remarks

BeaconSunset to sunrise · White-green (lighted land airport)

CTAF126.825

FREQUENCIES

Communications

119

AUSTIN APP/DEP

A/D

120.825

AWOS 3

AWOS

121.35

CLNC DEL

CLD

123.05

CTAF/UNICOM

UNIC

126.825

CTAF

Not all tower/ground/approach frequencies are in our datasets. Verify with the FAA Chart Supplement.

AIRCRAFT ACTIVITY

KHYI traffic patterns

2026-06-12 to 2026-10-26, 66 days observed · data 2026-10-26

High confidence

TRAFFIC VOLUME (30-DAY)

AVG LANDINGS/DAY

38.3

AVG OPS/DAY

Operations trend (18 days)

Busiest day: Thu · Busiest month: Sep

FLEET MIX

Piston single 72%Unknown 13%Jet 6%Turboprop 4%Twin 3%Helicopter 1%

Mostly small piston aircraft.

TOP AIRCRAFT TYPES

›C172 (Piston single) · ~297 landings/mo

›UNKN (Unknown) · ~29 landings/mo

›C72R (Unknown) · ~20 landings/mo

›M20P (Piston single) · ~12 landings/mo

›C150 (Piston single) · ~12 landings/mo

LIKELY BASED AIRCRAFT

Low-confidence estimate

Aircraft likely based near this airport (estimate), mostly single-engine piston aircraft.

›C172 (Piston single)

›UNKN (Unknown)

›M20P (Piston single)

›P06T (Unknown)

›C72R (Unknown)

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

Current flight category at nearby reporting stations.

KBAZ New Braunfels National Airport

15 NM SW

VFR

KAUS Austin Bergstrom International Airport

21 NM NE

VFR

KRND Randolph Air Force Base

31 NM SW

VFR

KSAT San Antonio International Airport

38 NM SW

VFR

KSSF Stinson Municipal Airport

46 NM SW

VFR

KSKF Lackland Air Force Base

48 NM SW

VFR

AIRPORT REMARKS

Operational remarks

›6 FT FENCE 130-199 FT DSTC, 360 FT L.

›100LL SELF SVC; 100 LL & JET A+ AVBL FULL SERVE.

›MALS RWY 13; MIRL RWYS 08/26, 13/31 & 17/35 PRESET LOW INTST; TO ACTVT AND INCR INTST - CTAF.

›ESTABLISHED PRIOR TO 1940.

›FOR CD CTC AUSTIN APCH AT 512-369-7865.

›APN ALL IREG SFC.

›BIRDS AND WILDLIFE ON AND INVOF ARPT.

›TSNT ACFT PRKG AVBL ON FBO RAMP ONLY. ALL OTR RAMP AREAS RESD FOR BASED ACFT OR RQR PRIOR CDN WITH ARPT MGMT.

›FOR AFT HRS SVC 800-229-2379. CALL-IN FEE.

OFFICIAL LINKS & SOURCES

↗Search NOTAMs (official FAA NOTAM Search)

↗Wikipedia

↗KHYI on OurAirports

FREQUENTLY ASKED

Does KHYI have a METAR?

Yes. KHYI has a current METAR observation, decoded into plain English on this page.

Does KHYI have a TAF?

When KHYI issues a TAF, its decoded forecast timeline loads live on this page; otherwise use the nearest TAF-issuing field as a planning reference.

What is the field elevation at KHYI?

KHYI sits at 597 ft MSL, which factors into the density-altitude estimate on this page.

Is this an official preflight weather briefing for KHYI?

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.