ATIS Alerts Flying Weather Index
ATIS Alerts analyzed 646 million historical surface weather observations from 2,082 U.S. airport weather stations over 2006–2025 to show pilots the long-term flying-weather patterns behind every airport — which fields see the most VFR, the most IFR, the strongest winds, the thickest fog, and the steadiest year-round training weather.
- Airports ranked
- 1,400
- Observations analyzed
- 646 million
- Study period
- 2006–2025
- Flying regions
- 32
Last updated 2026-07-20 · Methodology version v1 · How we calculate these · Data sources
Featured rankingBest VFR Flying Regions in the United States
The 32 ATIS Alerts flying regions ranked by long-term VFR weather — daylight VFR frequency, estimated VFR flying days per year, visibility, ceilings, and seasonal consistency.
See the regional ranking →VFR & IFR conditions
Most VFR Weather
The percentage of valid daytime hourly observations classified VFR — ceiling above 3,000 ft and visibility better than 5 statute miles — across the study period.
See the ranking →Most IFR Weather
The combined percentage of hourly observations classified IFR or LIFR — ceiling below 1,000 ft and/or visibility under 3 statute miles.
See the ranking →Lowest Ceilings
The share of observations with a ceiling below 1,000 ft.
See the ranking →Most Changeable
The average number of flight-category transitions (VFR↔MVFR↔IFR↔LIFR) per day.
See the ranking →Most Thunderstorms
Estimated days per year with at least one observation reporting a thunderstorm.
See the ranking →Wind & crosswinds
Windiest Airports
Average sustained surface wind speed across all valid hourly observations in the study period.
See the ranking →Calmest Airports
The ATIS Alerts Wind Score (0–100): a higher score means calmer, more manageable historical surface winds — low median wind, frequent calm, few strong-wind and high-gust hours, and low crosswind exposure.
See the ranking →Most Crosswind-Prone
The share of windy observations where even the most favorable runway leaves a crosswind component above 15 knots, using each airport's actual runway headings.
See the ranking →Visibility, fog & ceilings
Flight training weather
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Educational use only. Historical weather rankings from ATIS Alerts are educational summaries of past observations — not a forecast, flight-planning tool, or safety rating. They do not replace current METARs, TAFs, NOTAMs, ATIS, or a weather briefing, and favorable history does not make any airport safe. Always check current conditions and use your own judgment before flight.
Not ranked here? See how airports qualify — rankings require at least 10 complete years of quality-controlled observations.
Track today's weather at any airport
History tells you the pattern; ATIS Alerts tells you now. Get a Telegram message when your airport's ATIS changes or it drops below VFR.