Current Weather
Raw METAR
Weather Briefing
MVFRSouthern Illinois Airport is currently reporting marginal VFR (MVFR) conditions with clear skies and 3 SM visibility.
Wind Analysis
Winds are calm, presenting no crosswind concerns for any runway.
Visibility & Ceiling
Visibility is 3 SM, below VFR minimums in some airspace classifications. Check local requirements before departing VFR. Skies are clear with unlimited ceiling.
Temperature & Moisture
Temperature is 21°C (70°F) with a dewpoint of 21°C. The temperature-dewpoint spread is very narrow, indicating saturated or near-saturated air. Fog formation or low cloud development is likely.
Pilot Recommendations
VFR pilots should exercise caution. Consider filing IFR if instrument rated, or postponing the flight if conditions are expected to deteriorate further. The narrow temperature-dewpoint spread creates risk of fog formation, particularly during evening and early morning hours.
This briefing is generated from real-time METAR and TAF data. Always verify with official sources before flight.
24-Hour Weather Evolution
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Airport Runway Layout
Runway Information
| Runway | Length | Width | Surface | Heading | Wind Component |
|---|---|---|---|---|---|
| 06/24 | 4,164 ft | 100 ft | ASP | 60° |
↑ 0.0 kt
•
↔ 0.0 kt
60° angle
|
| 18L/36R | 6,506 ft | 100 ft | ASP | 181° |
↑ 0.0 kt
•
↔ 0.0 kt
179° angle
|
| 18R/36L | 3,498 ft | 60 ft | ASP | 181° |
↑ 0.0 kt
•
↔ 0.0 kt
179° angle
|
Weather Statistics - KMDH
8,089 observations | Sep 2025 - Jul 2026Flight Rules Distribution
Southern Illinois Airport typically experiences VFR conditions 75.1% of the time, though instrument-rated pilots will find IFR weather present approximately 9.3% of observations. Prevailing winds are from the S averaging 8.4 knots, with gusts recorded up to 36 knots. Calm conditions occur 20.4% of the time. Temperature extremes range from -18°C to 36°C, reflecting significant seasonal variation. The best months for VFR flying are July, June, April.
Wind Analysis
Temperature Range
Visibility
Best Months for VFR
Runway Wind Analysis
Statistics computed from 8,089 METAR observations (Sep 2025 - Jul 2026). Data sourced from official aviation weather services. Updated daily.
Southern Illinois Airport - Airport Information
Airport Details
Location
Runway Information
Flight Planning Tools
Nearby Airports
About Southern Illinois Airport
Overview
Southern Illinois Airport serves the Murphysboro area as a medium-sized airport positioned in southern Illinois. Located at coordinates 37.778099, -89.251999 with an elevation of 411 ft MSL, the airport provides critical aviation infrastructure for regional transportation and operations. Its three asphalt runways offer flexible aircraft handling capabilities for various aviation needs.
Flying Conditions
Weather conditions at Southern Illinois Airport demonstrate predominantly favorable flying environments, with 71.9% of observations reporting VFR conditions. Temperature ranges from -14°C to 36°C, creating diverse seasonal flying scenarios. Wind patterns are predominantly from the south at an average of 7.8 knots, with calm conditions occurring 26.5% of the time, which generally supports stable flight operations.
Notable Features
The airport features three asphalt runways with varying lengths: 06/24 at 4,164 ft, 18L/36R at 6,506 ft, and 18R/36L at 3,498 ft. All runways demonstrate 100% favorable wind alignment, with minimal average crosswind conditions ranging from 4-5.6 knots. Visibility averages 8.8 statute miles, with limited instances of restricted visibility (below 3SM occurring only 2.8% of the time).
Approach Considerations
Pilots can expect optimal approach conditions, particularly during January, September, and October, which statistically provide the best VFR environments. The longest runway (18L/36R at 6,506 ft) offers the most substantial landing/takeoff platform. Given the prevailing southern wind direction, approaches on runways aligned near 180 degrees will typically experience most favorable wind conditions.
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.
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Recommended guides based on current conditions at KMDH
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.