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Heatwaves in Brisbane, humid nights that linger

Brisbane summers are humid, and January nights often stay near 21 °C. Storms interrupt the flush. Open when outdoor air is cooler, and watch the dew point.

Brisbane is the sticky capital. On the Bureau of Meteorology’s long-term city table, the November minimum is about 17.9 °C and the January minimum about 21.2 °C. Summer nights here often meet the European idea of a tropical night: the minimum stays above 20 °C. That is still not a night stuck near 28 °C. A room at 29 °C can still lose heat to air at 23 °C. A room already at 24 °C cannot.

Humidity is the other half. A high dew point makes a small temperature drop feel heavier than the same drop in Adelaide. Treat summer air as warm and humid. Afternoon and evening storms are part of the season. They interrupt a planned flush. Wait them out, then reopen only if outdoor air is still the cooler one.

Houses that were built to breathe, and flats that were not

  • Older elevated houses and louvres can cross-ventilate. A sealed apartment cannot, and opening it onto air as warm as the room does not invent a gap
  • Shade the glass through the afternoon, especially west-facing panes. See protect your windows
  • Prefer a shorter opening when the dew point is high, not every window wide until dawn. See night flush
  • A ceiling fan, or a fan aimed at skin, is the first tool when the gap is small. See where to place a fan
  • Pollen maps in Ventilate cover Europe (CAMS). An empty pollen row in Brisbane does not close the windows
  • Compare indoor and outdoor air before you turn on the air conditioning

Practical Brisbane night

  • November can still cool. January is the month when the minimum often stays in the low 20s
  • Open when shaded outdoor air is cooler than indoors, even if the air feels heavy
  • If both sit in the mid-20s, close and cool people with moving air, then the machine
  • After a storm, check the temperatures again before you reopen

The long-term picture is the Bureau’s city table. Tonight follows your indoor thermometer.

Shade, airflow, and how much of the suburb is bare paving are also public choices: heatwaves and public choices.

Updated

Sources and further reading

Official guidance supporting the practical advice on this page.

Links checked 29 August 2026.

More in this guide

Heatwaves in Paris, and the night the street stays warm

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Heatwaves in Madrid, dry heat and a street that holds the day

Madrid days run very hot and dry. The heat island still matters at night, when asphalt gives the sun back. Shade hard by day, then flush only when the street has actually cooled.

Heatwaves in Rome, stone that keeps the afternoon

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Lisbon sits on hills above the river, with Atlantic humidity. Nights can fail to dry out even when the thermometer drops a little. Heat islands on mineral streets make the useful opening shorter and stickier.

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Mexico City sits at about 2,240 m. UV is often fierce, dry-season nights can still cool, and the Valley heat island shortens the hours when ventilation actually helps.

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São Paulo summers are humid, high-rises hold heat, and tropical nights often refuse to dry out. Traffic pollution and storms change when a night flush is actually worth it.

Heatwaves in Buenos Aires, humid summers on the river

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Heatwaves in Amsterdam, canals, brick, and nights that lag behind

Amsterdam summers are rarely the hottest in Europe on paper, but humid air and dense canal belts keep nights sticky. Brick, asphalt, and little exterior shading shorten the window when outdoor air finally helps.

Heatwaves in Sydney, coast nights and a hotter west

Sydney's heat season is December to February. The coast can breathe while western suburbs hold the day. Open when the air at your window is actually cooler.

Heatwaves in Rotterdam, wind, towers, and hot dockside air

Rotterdam catches more breeze than inland cities, but asphalt, port heat, and high-rise slabs still store the day. Nights cool earlier on the river side than in a sealed post-war block.

Heatwaves in Melbourne, and the night of the cool change

Melbourne heat often arrives on a northerly and breaks with a cool change. Many nights still drop. Open when outdoor air is cooler than the room.

Heatwaves in Perth, dry days and the afternoon sea breeze

Perth summers are hot and dry. The afternoon sea breeze usually helps nights fall. Open wide only once outdoor air is cooler than the room.

Heatwaves in Adelaide, very hot days and nights that often fall

Adelaide days can be extreme. Dry air often lets the night recover. Shade hard by day, then flush only when outdoor air is cooler than the room.

Heatwaves in cities, and why nights stay hot · All guides

These guides are informational and are not medical advice. If heat is making you unwell, follow your local health agency’s guidance.