Tainan International Airport / Tainan Air Base

RCNN / TNN

Tainan (Rende), TW

Last Updated
Apr 23, 02:00Z

Military Airport

Restricted

This is a military aerodrome. Civil aircraft access may be restricted or require prior authorization. Consult the applicable AIP for current access procedures.

Consult the applicable national AIP for current access procedures and restrictions.

Current Weather

Display Units
Recent 32 min ago
02:00Z

🌙 Night
VFR
Flight Rules
31°C
Temperature
Dewpoint: 21°C
4 kt
210°
10+ km
Visibility
6,000 ft
Ceiling
Above Ground Level
342 hPa
QNH
Altimeter Setting

Raw METAR

METAR RCNN 230200Z 21004KT 9999 FEW012 SCT030 BKN060 31/21 Q1010 NOSIG RMK A2983

Clouds - Visual Profile

12,000ft
9,000ft
6,000ft
3,000ft
Ground
Field Elev: 63 ft
FEW 1,200 ft AGL
SCT 3,000 ft AGL
BKN 6,000 ft AGL
🌤️
FEW
Few (1/8-2/8 sky coverage)
1,200 ft
AGL (Above Ground)
1,263 ft AMSL
SCT
Scattered (3/8-4/8 sky coverage)
3,000 ft
AGL (Above Ground)
3,063 ft AMSL
☁️
BKN
Broken (5/8-7/8 sky coverage)
6,000 ft
AGL (Above Ground)
6,063 ft AMSL

Weather Briefing

VFR

Tainan International Airport / Tainan Air Base is currently reporting visual flight rules (VFR) conditions with broken clouds at 6,000 feet and 10 miles or greater visibility.

Wind Analysis

Winds are from the south-southwest (210°) at 4 knots.

Visibility & Ceiling

Visibility is unrestricted. The ceiling is 6000 feet AGL (broken), well above standard VFR minimums.

Temperature & Moisture

Temperature is 31°C (88°F) with a dewpoint of 21°C, indicating moderate moisture conditions. High temperatures at this elevation may result in significant density altitude effects. Pilots should calculate density altitude and adjust performance expectations accordingly.

Forecast Outlook

The TAF forecast covers the next 24 hours. Conditions are expected to fluctuate between VFR and MVFR. VFR pilots should be prepared for deteriorating conditions. Expected weather includes: Light Rain. Temporary MVFR conditions are forecast with Light Rain between 06:00Z and 11:00Z. Temporary VFR conditions are forecast between 18:00Z and 23:00Z.

Pilot Recommendations

Conditions are favorable for visual flight. The forecast indicates conditions may deteriorate. Ensure you have fuel reserves and a viable alternate airport.

This briefing is generated from real-time METAR and TAF data. Always verify with official sources before flight.

QNH
342 hPa
Sea Level Pressure
For altitude above MSL
QFE
340 hPa
Field Pressure
Height above aerodrome (63 ft)
Pressure Alt
20,201 ft
QNE Reference
Standard: 1013 hPa
Density Altitude: 22,136 ft (High - Reduced Performance)
ISA Deviation: +16.1°C

Forecast (TAF)

View Full TAF
Raw TAF
TAF RCNN 222300Z 2300/2324 14004KT 9999 FEW012 SCT040 BKN100 TX28/2305Z TN23/2320Z BECMG 2301/2304 24008KT TEMPO 2306/2311 8000 -RA FEW010 BKN025 BKN050 BECMG 2314/2317 14004KT 6000 -RA FEW008 BKN020 BKN040 TEMPO 2318/2323 9999 FEW010 BKN040
Upcoming Changes (Next 12 Hours)
02:31Z BASE
+0h
VFR 140° 4 kt
Visibility: 10+ km
Ceiling: 10,000 ft
06:00Z TEMPO
+4h
MVFR
Visibility: 8 km
Ceiling: 2,500 ft
Light Rain
14:00Z BECMG
+12h
MVFR 140° 4 kt
Visibility: 6 km
Ceiling: 2,000 ft
Light Rain

24-Hour Weather Evolution

Loading weather data...
Data Sources
  • • Current conditions from METAR observations
  • • Historical data from past 24 hours
  • • No forecast or predicted data included
  • • Data updated with each new METAR report
Chart Features
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Note: Future values beyond current TAF validity are estimates based on climatological data and trends. Always verify with current forecasts before flight operations.

Airport Runway Layout

N
CNN
18L ✈️
36R
18R ✈️
36L

Runway Information

Runway Length Width Surface Heading Wind Component
✈️ 18L/36R
Active: 18L
10,007 ft 148 ft CON 178°
3.5 kt 2.0 kt
30° angle
✈️ 18R/36L
Active: 18R
10,007 ft 148 ft CON 178°
3.5 kt 2.0 kt
30° angle
🟢 Active Runway: Best headwind component for current conditions
⬆️ Headwind: Favorable wind component
↔️ Crosswind: ≤10kt Safe, 11-15kt Caution, >15kt Challenging

Weather Statistics - RCNN

9,006 observations | Sep 2025 - Apr 2026

Flight Rules Distribution

VFR
73.6%
MVFR
20.3%
IFR
6%
LIFR
0.1%

Tainan International Airport / Tainan Air Base typically experiences VFR conditions 73.6% of the time, though instrument-rated pilots will find IFR weather present approximately 6.1% of observations. Prevailing winds are from the N averaging 6.3 knots. Temperature extremes range from 0°C to 35°C, reflecting significant seasonal variation. The best months for VFR flying are October, January, September.

Wind Analysis

Prevailing Direction: N (0°)
Average Speed: 6.3 kt
Maximum Recorded: 21 kt
Calm Winds: 6.4%
Direction Distribution:
N
49.9%
NE
13%
E
5.5%
SE
2.3%
S
2.6%
SW
2.2%
W
6.5%
NW
11.5%

Temperature Range

Average: 23.8°C
Range: 0°C to 35°C
0°C 35°C

Visibility

Average: 10 SM
Below 3 SM: 0%
Fog Frequency: 0%

Best Months for VFR

October January September

Runway Wind Analysis

Runway 18L/36R
Favorable wind: 100%
Avg crosswind: 2.6 kt
Runway 18R/36L
Favorable wind: 100%
Avg crosswind: 2.6 kt

Statistics computed from 9,006 METAR observations (Sep 2025 - Apr 2026). Data sourced from official aviation weather services. Updated daily.

Tainan International Airport / Tainan Air Base - Airport Information

Airport Details

ICAO Code: RCNN
IATA Code: TNN
Type: medium airport
Status: active
Elevation: 63 ft MSL

Location

City: Tainan (Rende)
Country: TW
Latitude: 22.950399°
Longitude: 120.206001°
Time Zone: Etc/GMT-8

Runway Information

Runway 18L/36R
Length: 10,007 ft
Width: 148 ft
Surface: CON
ILS: No
Runway 18R/36L
Length: 10,007 ft
Width: 148 ft
Surface: CON
ILS: No

About Tainan International Airport / Tainan Air Base

Tainan International Airport / Tainan Air Base is a military facility. Civilian access may be restricted or require Prior Permission (PPR). Pilots should consult the TW AIP for current access procedures and restrictions.

Overview

Tainan International Airport serves the Tainan metropolitan area in southern Taiwan, functioning as both a civilian and military airfield. Located in Rende at an elevation of 63 feet MSL, the airport provides critical aviation infrastructure for the region with two parallel concrete runways, each 10,007 feet in length. Its strategic position supports both commercial and military aviation operations.

Flying Conditions

Statistical data indicates highly favorable flying conditions, with 77.6% of observations reporting VFR conditions. Wind patterns are predominantly northerly at an average of 6.1 knots, with occasional peaks up to 21 knots. Temperature ranges from 0°C to 35°C, with an average of 24.1°C, suggesting stable and predictable meteorological conditions for most of the year.

Notable Features

The airport features two parallel runways (18L/36R and 18R/36L) with identical configurations, both offering 10,007 feet of concrete surface. Both runways demonstrate consistently favorable wind alignment, with 100% wind compatibility and minimal average crosswind of 2.3 knots. The airport's low elevation and geographical positioning contribute to generally consistent operational parameters.

Approach Considerations

Pilots can expect excellent visibility averaging 10 statute miles, with minimal instances of restricted conditions. January, September, and October represent the most consistently favorable flying months. The dual parallel runway configuration provides operational flexibility, with both runways showing identical wind characteristics and length, enabling reliable approach and departure options.

Data Sources & Accuracy: Airport information sourced from OurAirports.com, a collaborative database of worldwide airport data. Weather data from official aviation weather services including NOAA Aviation Weather Center and international METAR/TAF providers. Information is updated regularly but pilots should always verify current conditions and NOTAMs through official channels before flight operations.

Official Data Sources

Weather NOAA Aviation Weather Center • International METAR/TAF Network
Airports OurAirports.com • Public domain airport database
NOTAMs FAA NOTAM System • ICAO NOTAM Distribution
Last updated: Jan 1, 1970 12:00 AM UTC

Disclaimer: Data is provided for informational purposes only. Pilots must verify all information through official sources before flight operations. Weather conditions change rapidly; always obtain a current briefing from approved weather services.