A new study from Save on Energy identifies U.S. cities with the most unpredictable weather — a factor that can disrupt flights and make air travel less reliable. The analysis considered multiple weather variables including temperature swings, precipitation (rain and snow) and wind, all of which influence aircraft operations, takeoff and landing safety, and on-time performance.
Researchers combined publicly available climate and weather data to rank cities by variability and unpredictability. High variability often means rapid changes in conditions during a single day or season, which increases the chance of delays, cancellations and airport operational challenges. Below are the cities the study found to have the most unpredictable weather:
- Sioux Falls, S.D.
- Minneapolis, Minn.
- St. Paul, Minn.
- Omaha, Neb.
- Des Moines, Iowa
- Madison, Wis.
- Lincoln, Neb.
- Cedar Rapids, Iowa
- Rockford, Ill.
- Chicago, Ill.
By contrast, the study highlights several cities with very stable weather patterns. These locations typically experience fewer abrupt changes in temperature, precipitation and wind, which can contribute to more predictable travel conditions for airports and passengers:
- Honolulu, Hawai’i
- Oxnard, Calif.
- Chula Vista, Calif.
- Salinas, Calif.
- San Diego, Calif.
- Thousand Oaks, Calif.
- San Francisco, Calif.
- Irvine, Calif.
- Torrance, Calif.
- Huntington Beach, Calif.
Understanding which cities have volatile weather can help travelers plan trips more strategically—choosing flights at times of day or seasons with historically fewer disruptions, allowing extra connection time, or monitoring forecasts closely before departure. Regional geography, proximity to large bodies of water, and local climate patterns all contribute to a city’s weather stability. For those concerned about travel reliability, the study’s full rankings and methodology provide additional context and are available from the original source.