Headaches have long been considered one of the most common consequences of changing weather conditions. However, researchers have struggled to determine exactly which atmospheric factors pose the greatest risk for people prone to migraines. A new study conducted by scientists from the University of Cincinnati, the Icahn School of Medicine at Mount Sinai, and several other research institutions has brought them closer to an answer.

The findings were presented at the annual meeting of the American Headache Society in June 2026, according to Medical Xpress.

For the study, researchers analyzed thousands of diary entries from patients with episodic migraine and compared them with detailed meteorological data collected over several years. Rather than examining individual weather variables, the team focused on broader weather systems and their effects on the human body.

The analysis revealed two weather patterns that appear to be particularly problematic. The first is the approach of a cold front or low-pressure system accompanied by precipitation. These conditions can occur at any time of the year and were associated with a higher likelihood of developing a new headache episode. The second factor is the so-called Bermuda High, a large high-pressure system that strongly influences summer weather across eastern North America. Researchers also observed an increase in migraine attacks during periods when this system was active.

According to the authors, this is one of the first studies to directly link the passage of atmospheric fronts with migraine onset. They suggest that rapid weather changes, rather than individual measures such as temperature or humidity alone, may play a key role in triggering attacks among susceptible individuals.

Another important finding involved fremanezumab, a medication used to prevent migraines. Researchers found that after several months of treatment, the relationship between unfavorable weather conditions and headache occurrence weakened significantly. In some cases, the weather-related effect nearly disappeared.

The scientists emphasize, however, that the influence of weather on migraines remains complex and highly individual. Previous studies have produced mixed results: for some people, changes in air pressure, humidity, or wind can trigger attacks, while others show little or no such association. Weather likely acts in combination with stress, sleep deprivation, dietary factors, and other influences.