Article

How does high or low barometric pressure affect the body?

No level of barometric pressure, high or low, is known to be good or bad for the body, and there is no best reading to aim for. What researchers study is change: pressure swings are associated with symptoms in some people — most studied for migraine, also reported for joint pain, sinus and ear discomfort, dizziness, fatigue and mood — with modest effect sizes and sensitivity that varies widely from person to person.

Level or change: the question behind “high” and “low”

Almost every version of this search assumes the level matters: “high barometric pressure symptoms”, “what does low barometric pressure do to the body”. The research mostly does not look at level. It looks at how much the pressure moved, usually over 24 hours.

Take two still days. On one, pressure sits at 30.20 inHg (1022.7 hPa), inside the high band on this site’s pressure zones. On the other it sits at 29.70 inHg (1005.8 hPa), just inside the bottom of the normal band. For most people both days are unremarkable, and no study has identified either reading as one at which symptoms start. What separates a quiet day from a notable one, in the literature this site draws on, is a 24-hour change of 0.18 inHg (6 hPa) or 0.30 inHg (10 hPa) — the swing-day and big-swing-day cut points. Those are conventional bins, not clinically validated thresholds.

People who live with pressure sensitivity tend to describe it the same way. The phrasing in patient forums is about the move, not the number: “I feel it the day before everyone else”, or “some of us are more sensitive to the drop than the low pressure itself.” Those are reports, not evidence, but they point at the right variable. If you came with a reading in hand, the article on normal barometric pressure covers what counts as high or low, and falling and rising barometric pressure covers what the direction of change means for the weather.

How big a pressure change is, physically

Weather-scale pressure changes are small. Near sea level, pressure falls by about 0.03 inHg (1 hPa) for every 8.3 meters (27 feet) you climb — a figure that follows directly from the standard barometric formula under International Standard Atmosphere assumptions.

• ~83 m(~270 ft) of elevation ≈ a 0.30 inHg (10 hPa) big-swing day
• ~290 m(~950 ft) ≈ the whole span from the bottom of “low” to the top of “high”
• 0.03 inHg (1 hPa)≈ 8.3 m (27 ft) near sea level

A big-swing day, then, delivers over 24 hours roughly the pressure change of riding an elevator to the top of a tall building. The entire range from 29.38 inHg (995 hPa) to 30.42 inHg (1030 hPa) — the low, normal and high zones together, 1.03 inHg (35 hPa) — is about what you pass through driving up a modest hill. People ride elevators and drive hills every day and pass through changes of that size in minutes.

That is why the most repeated explanation — low pressure “lets tissues expand” — is hard to take at face value. No source located for this page demonstrates it, and the forces involved are tiny. None of this rules out an effect in some people; it means any real link has to be something subtler than air pushing less on the body, and that pressure changes arrive together with temperature, humidity and wind shifts that studies struggle to separate out.

Symptom by symptom: what is reported and what is known

A 2023 review of weather sensitivity by Hoxha and Zappacosta in the Journal of Medicine and Life lists what weather-sensitive people report: headache; pain in the head, neck and shoulders; increased pain sensitivity in joints and muscles; dizziness; sleep disorders; anxiety, irritability and depression; changes in blood pressure and heart rate; stomach and breathing complaints; and a desire to stay indoors. Two caveats apply to that list. It describes weather in general — temperature, humidity, wind and pressure together — not pressure alone. And it is what people report, not what has been measured to follow from pressure change.

Migraine and headache

This is the best-studied link. Studies have repeatedly found a statistical association between pressure change and migraine onset in some people, and no association in others; effect sizes are modest and individual sensitivity varies widely. That is the same wording that sits behind the outlook calendar on every city page, explained on the methodology page.

Joint pain

Increased pain sensitivity in joints and muscles appears on the self-reported symptom list in the Hoxha review. What studies of pressure and joint pain specifically have and have not found is covered in barometric pressure and joint pain.

Sinus and ear pressure

This is the one route with straightforward physics behind it. Boyle’s law says a trapped pocket of gas expands slightly when the surrounding pressure falls and compresses slightly when it rises. A sinus cavity, or a middle ear behind a blocked Eustachian tube, is that kind of pocket. The direction of the effect is real; the size, at weather-scale changes of a few hPa to a few tens of hPa over hours, is small — a fraction of what the same cavity goes through in a descending airliner. No study located for this page sets a pressure-change threshold for sinus or ear symptoms.

Dizziness, vertigo and Menière’s disease

Dizziness appears on the self-reported symptom lists, and the inner ear is the most interesting candidate for a pressure sensor. In mice, experimentally lowering the air pressure in a climate chamber activated neurons in the vestibular nucleus (Sato and colleagues, 2019, cited in the Hoxha review), and a 2025 mouse study in Scientific Reports, “The inner ear is a barometric pressure sensor”, found vestibular ganglion cells responding to lowered pressure. Both are animal studies; neither shows the same thing in people.

The human evidence is in Menière’s disease. In a 2016 PLoS ONE study, Gürkov and colleagues had German patients keep daily vertigo diaries alongside local hourly weather. Symptom flares were associated with a rise in air pressure the day before, not a fall — the opposite of the usual “falling pressure” story — and the mechanism is unclear, as the Vestibular Disorders Association notes in its summary. Studies on Menière’s and pressure disagree about which direction of change matters, and about whether level or change is the relevant variable.

Tinnitus

The evidence here is thin and indirect. Tinnitus is one of the three core symptoms of Menière’s disease, so to the extent pressure is associated with Menière’s flares, tinnitus comes along as part of the episode. No study of pressure and tinnitus on its own turned up in the research for this page.

Fatigue, sleepiness and mood

“Does low barometric pressure make you tired?” is a common question, and forum descriptions are vivid — “foggy”, a heavy, medicated-feeling sleepiness. Sleep disorders, anxiety, irritability and depression all appear on the self-reported lists. But the research behind them in the Hoxha review bundles pressure with temperature, humidity and season, and much of it concerns psychiatric admissions rather than everyday tiredness. Controlled work isolating pressure’s effect on fatigue or mood is thin, and no pressure-specific effect size is available. The same holds for high pressure: there is no established “high barometric pressure fatigue”.

Why are some people more sensitive than others?

Nobody knows. The research vocabulary distinguishes meteorosensitivity — feeling the weather without a diagnosable illness — from meteoropathy, where weather change brings on or worsens a disease. Researchers classify both with a questionnaire, METEO-Q, of 11 items plus a 21-symptom checklist. That makes the experience measurable as a self-report; it does not explain it.

The candidate explanations are just that. The inner-ear findings above suggest a pathway exists in mice. Many of the primary studies the Hoxha review draws on are small, single-center, or in animals.

Checking your own pattern

Because sensitivity is individual, the most useful evidence is your own. Keep a simple symptom log, then compare it against the 30 days of pressure history and the swing days marked on your city’s calendar on any of the 50 city pages, or on the page for any US location if your town is not one of them. Find the bad days and see what the barometer was doing. Over a month or two, that tells you more about whether you track pressure than any study average.

Where in the US pressure changes most often

How often you meet a swing day depends heavily on where you live. Ten years of Open-Meteo ERA5 hourly reanalysis, 2015–2024, give these yearly averages:

The spread is enormous. Someone in Colorado Springs averages 171.6 big-swing days a year; someone in Miami averages 3.2. Boston is the sea-level standout: it also holds the sharpest 24-hour fall in the whole dataset, 1.52 inHg (51.5 hPa).

Two caveats. First, at 6 hPa the swing count saturates in volatile cities — Denver’s 281.6 swing days are about 77% of all days — so the 10 hPa big-swing count is the better way to compare them. Second, these are sea-level-reduced figures, and that reduction inflates apparent variability at altitude, so part of Denver’s and Colorado Springs’s numbers reflects their elevation, not just their weather. Reanalysis is also a model reconstruction, not a station’s barograph.

Pressure change has been statistically associated with migraine, joint pain, dizziness and other symptoms in some people, and not in others; effect sizes are modest, findings are mixed, and individual sensitivity varies widely. Nothing on this page predicts symptoms, diagnoses anything, or is medical advice. If symptoms are affecting your life, that is a conversation for a clinician.

All 50 city pages · Check any US location · Methodology