St. Louis Lambert International Airport

KSTL / STL

St Louis, US

Last Updated
Mar 4, 18:40Z

Current Weather

Display Units
Fresh 12 min ago
18:40Z

🌙 Night
MVFR
Flight Rules
11°C
Temperature
Dewpoint: 10°C
3 kt
170°
3 SM
Visibility
2,800 ft
Ceiling
Above Ground Level
1018 hPa
QNH
Altimeter Setting

Raw METAR

SPECI KSTL 041840Z 17003KT 3SM -RA BR FEW004 BKN028 OVC100 11/10 A3006 RMK AO2 TSB1754E17 P0007 T01060100

Clouds - Visual Profile

12,000ft
9,000ft
6,000ft
3,000ft
Ground
Field Elev: 618 ft
FEW 400 ft AGL
BKN 2,800 ft AGL
OVC 10,000 ft AGL
🌤️
FEW
Few (1/8-2/8 sky coverage)
400 ft
AGL (Above Ground)
1,018 ft AMSL
☁️
BKN
Broken (5/8-7/8 sky coverage)
2,800 ft
AGL (Above Ground)
3,418 ft AMSL
☁️
OVC
Overcast (8/8 sky coverage)
10,000 ft
AGL (Above Ground)
10,618 ft AMSL
QNH
1018 hPa
Sea Level Pressure
For altitude above MSL
QFE
997 hPa
Field Pressure
Height above aerodrome (618 ft)
Pressure Alt
476 ft
QNE Reference
Standard: 1013 hPa
Density Altitude: 144 ft
ISA Deviation: -2.8°C

Forecast (TAF)

View Full TAF
Raw TAF
TAF KSTL 041726Z 0418/0524 08006KT 4SM -SHRA BR OVC006 TEMPO 0418/0421 2SM TSRA BR SCT006 BKN060CB FM042100 VRB04KT 6SM BR SCT015 OVC050 FM050300 VRB04KT 3SM -TSRA BR OVC008CB FM050900 VRB04KT 4SM BR OVC005 FM051600 28006KT P6SM SCT008 BKN025
Upcoming Changes (Next 12 Hours)
18:51Z BASE
+0h
IFR 80° 6 kt
Visibility: 4SM
Ceiling: 600 ft
Light Showers Rain, Mist
21:00Z FM042100
+3h
VFR VRB 4 kt
Visibility: 6SM
Ceiling: 5,000 ft
Mist
03:00Z FM050300
+9h
LIFR VRB 4 kt
Visibility: 3SM
Ceiling: 800 ft
Light Thunderstorm Rain, Mist

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
STL
06
24
11 ✈️
29
12L ✈️
30R
12R ✈️
30L

Runway Information

Runway Length Width Surface Heading Wind Component
06/24 7,600 ft 150 ft CON 63°
0.9 kt 2.9 kt
107° angle
✈️ 11/29
Active: 11
9,000 ft 150 ft CON 122°
1.5 kt 2.6 kt
60° angle
✈️ 12L/30R
Active: 12L
9,013 ft 150 ft CON 122°
1.9 kt 2.3 kt
50° angle
✈️ 12R/30L
Active: 12R
11,020 ft 150 ft CON 122°
1.9 kt 2.3 kt
50° angle
🟢 Active Runway: Best headwind component for current conditions
⬆️ Headwind: Favorable wind component
↔️ Crosswind: ≤10kt Safe, 11-15kt Caution, >15kt Challenging

Weather Statistics - KSTL

4,725 observations | Sep 2025 - Mar 2026

Flight Rules Distribution

VFR
75%
MVFR
14.1%
IFR
7.3%
LIFR
3.7%

St. Louis Lambert International Airport typically experiences VFR conditions 75% of the time, though instrument-rated pilots will find IFR weather present approximately 11% of observations. Prevailing winds are from the W averaging 8.3 knots. Calm conditions occur 11.2% of the time. Temperature extremes range from -20°C to 36°C, reflecting significant seasonal variation. The best months for VFR flying are February, September, October.

Wind Analysis

Prevailing Direction: W (270°)
Average Speed: 8.3 kt
Maximum Recorded: 29 kt
Calm Winds: 11.2%
Direction Distribution:
N
9.6%
NE
6.1%
E
13.3%
SE
11.7%
S
13%
SW
7.9%
W
14.4%
NW
12.7%

Temperature Range

Average: 7.9°C
Range: -20°C to 36°C
-20°C 36°C

Visibility

Average: 9.2 SM
Below 3 SM: 1.8%
Fog Frequency: 2.2%

Best Months for VFR

February September October

Runway Wind Analysis

Runway 06/24
Favorable wind: 100%
Avg crosswind: 5.9 kt
Runway 11/29
Favorable wind: 100%
Avg crosswind: 4.4 kt
Runway 12L/30R
Favorable wind: 100%
Avg crosswind: 4.3 kt
Runway 12R/30L
Favorable wind: 100%
Avg crosswind: 4.3 kt

Statistics computed from 4,725 METAR observations (Sep 2025 - Mar 2026). Data sourced from official aviation weather services. Updated daily.

St. Louis Lambert International Airport - Airport Information

Airport Details

ICAO Code: KSTL
IATA Code: STL
Type: large airport
Status: active
Elevation: 618 ft MSL

Location

City: St Louis
Country: US
Latitude: 38.748697°
Longitude: -90.370003°
Time Zone: Etc/GMT+6

Runway Information

Runway 06/24
Length: 7,600 ft
Width: 150 ft
Surface: CON
ILS: No
Runway 11/29
Length: 9,000 ft
Width: 150 ft
Surface: CON
ILS: No
Runway 12L/30R
Length: 9,013 ft
Width: 150 ft
Surface: CON
ILS: No
Runway 12R/30L
Length: 11,020 ft
Width: 150 ft
Surface: CON
ILS: No

About St. Louis Lambert International Airport

Overview

St. Louis Lambert International Airport serves as a major commercial airport located in the metropolitan area of St. Louis, Missouri. Situated at an elevation of 618 feet mean sea level, the airport is a critical transportation hub for the region. Its four substantial concrete runways demonstrate substantial capacity for commercial and general aviation operations.

Flying Conditions

The airport's four runways ranging from 7,600 to 11,020 feet provide flexibility for diverse aircraft types across varying weather conditions. Located at coordinates 38.748697, -90.370003, the airport experiences typical Midwestern weather patterns with potential seasonal wind variations. Pilots should anticipate potential crosswind scenarios given the multiple runway orientations.

Notable Features

St. Louis Lambert International features four parallel and perpendicular runway configurations, offering multiple approach and departure options. The longest runway (12R/30L) extends 11,020 feet, accommodating large commercial aircraft and providing significant operational flexibility. The airport's diverse runway layout enables efficient air traffic management across different wind conditions.

Approach Considerations

Runway selection will depend on prevailing wind direction, with options spanning 06/24, 11/29, 12L/30R, and 12R/30L. The substantial runway lengths provide considerable margins for various aircraft performance envelopes. Pilots should carefully assess current meteorological conditions and wind vectors when planning approaches to maximize safety and operational efficiency.

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.