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Airport Runway Layout
Runway Information
| Runway | Length | Width | Surface | Heading | Wind Component |
|---|---|---|---|---|---|
|
✈️ 11/29
Active: 11
|
8,101 ft | 150 ft | ASP | 113° |
↑ 3.8 kt
•
↔ 3.2 kt
40° angle
|
| 17/35 | 6,500 ft | 100 ft | ASP | 173° |
↓ 1.1 kt
•
↔ 4.9 kt
103° angle
|
Weather Statistics - KALN
6,877 observations | Sep 2025 - Mar 2026Flight Rules Distribution
St Louis Regional Airport typically experiences VFR conditions 78.3% of the time, though instrument-rated pilots will find IFR weather present approximately 9.3% of observations. Prevailing winds are from the S averaging 8.2 knots, with gusts recorded up to 50 knots. Calm conditions occur 15.5% of the time. Temperature extremes range from -22°C to 36°C, reflecting significant seasonal variation. The best months for VFR flying are September, October, February.
Wind Analysis
Temperature Range
Visibility
Best Months for VFR
Runway Wind Analysis
Statistics computed from 6,877 METAR observations (Sep 2025 - Mar 2026). Data sourced from official aviation weather services. Updated daily.
St Louis Regional Airport - Airport Information
Airport Details
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Runway Information
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About St Louis Regional Airport
Overview
St Louis Regional Airport serves the Alton/St Louis metropolitan area as a medium-sized airport situated at 544 feet above mean sea level. Located at coordinates 38.890301, -90.045998, the airport provides critical aviation infrastructure for the regional transportation network with two substantial asphalt runways supporting diverse aircraft operations.
Flying Conditions
The airport experiences predominantly favorable flying conditions, with visual flight rules (VFR) conditions present 76.7% of the time. Temperature ranges from -16°C to 36°C create varied operational environments, while wind patterns are consistently southerly at an average of 8.4 knots with occasional gusts up to 50 knots. September, October, and January demonstrate the most consistent VFR weather patterns.
Notable Features
Both primary runways (11/29 and 17/35) offer extended lengths suitable for multiple aircraft types, with Runway 11/29 providing 8,101 feet and Runway 17/35 offering 6,500 feet of asphalt surface. Wind data indicates 100% favorable wind conditions for both runways, with modest average crosswind components of 4.6 and 5 knots respectively. Visibility averages 9.3 statute miles, with minimal instances of restricted visual conditions.
Approach Considerations
Pilots should anticipate predominantly southern wind patterns when planning approaches, with calm conditions occurring 14.4% of the time. Instrument meteorological conditions (IFR, MVFR) represent approximately 23.3% of observations, suggesting periodic need for instrument approach capabilities. The airport's elevation and consistent wind characteristics provide generally predictable approach conditions across seasons.
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.
Learn More
Relevant guides based on current conditions at KALN
Official Data Sources
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.