Barometric Pressure and Headaches: How to Track the Connection

April 14, 2026

If you've ever felt a headache coming on before a storm, you're not imagining it. Research consistently shows that changes in barometric pressure can trigger headaches and migraines in susceptible people. The challenge has always been tracking this connection reliably.

What the Research Says

Multiple studies have found a link between atmospheric pressure changes and headache onset. A 2015 study published in Internal Medicine found that decreases in barometric pressure were associated with migraine onset, particularly drops of 5-10 hPa. Other research has shown that both rapid drops and sustained low pressure can trigger episodes.

The mechanism isn't fully understood, but theories include:

• Pressure changes affecting sinus cavities and creating pain signals
• Alterations in blood flow to the brain as the body adjusts to atmospheric changes
• Changes in serotonin and other neurotransmitter levels in response to weather
• Combined effects with other weather factors like humidity, temperature, and wind

Why Manual Tracking Fails

Knowing that barometric pressure might be a trigger is one thing. Proving it with your own data is another. Most people try one of these approaches and give up:

• Weather apps: You'd need to check and record the barometric pressure every time you get a headache. Mid-migraine, you're not doing that.
• Spreadsheets: Same problem. Manual lookup and data entry during pain episodes leads to gaps and inaccurate timestamps.
• Traditional headache trackers: Most don't capture barometric pressure at all, or require you to enter it manually.

The result is incomplete data, which makes it impossible to identify reliable patterns.

Automatic Barometric Pressure Tracking

The solution is capturing barometric pressure automatically at the exact moment a headache occurs. No manual lookup, no data entry, no friction.

Headache Logger does this with a single tap. When you log a headache, the app automatically records:

• Current barometric pressure in hectopascals (hPa)
• Pressure trend — whether pressure is rising, falling, or steady
• Temperature and humidity — other weather factors that may interact with pressure
• Air quality and pollen levels — additional environmental triggers
• Apple Health data — sleep, heart rate, HRV, and other metrics that may compound weather sensitivity

Over time, your CSV export builds a dataset that shows exactly what the barometric pressure was for every headache. You can sort, filter, and chart this data to see if pressure drops correlate with your episodes.

What to Look For in Your Data

Once you've logged enough headaches (researchers suggest at least 30-50 data points for meaningful patterns), look for:

• Pressure at onset: Is there a threshold below which headaches are more common?
• Pressure trend: Do your headaches cluster during falling pressure specifically?
• Rate of change: Is a rapid drop (e.g., 5+ hPa in a few hours) more triggering than a gradual decline?
• Combined factors: Do pressure drops plus poor sleep create a stronger correlation than either alone?

The 60+ column CSV from Headache Logger gives you all of this data, ready to import into Excel, Google Sheets, or a tool like Python pandas for deeper analysis.

Sharing with Your Doctor

If you suspect barometric pressure triggers your headaches, bringing data to your neurologist is far more effective than describing the pattern verbally. A CSV export showing headache timestamps alongside barometric pressure readings, sleep data, and other context gives your doctor concrete evidence to work with.

Headache Logger's export includes both metric and imperial units, timestamps with timezone information, and source statuses — all designed for clinical readability.

Beyond Barometric Pressure

While barometric pressure is one of the most discussed headache triggers, it rarely acts alone. Other factors captured automatically by Headache Logger include:

• Sleep quality — total hours, estimated wake time
• Heart rate variability (HRV) — a stress and recovery indicator
• Air quality — AQI, PM2.5, ozone, and other pollutants
• Pollen — six species tracked individually
• Time patterns — day of week, hour, part of day

The more context you capture per headache, the better your chances of identifying your personal trigger profile.