Air and heat today

What this is, and what it is not

Live air quality (AQI), feels-like heat and UV for Phnom Penh and every province of Cambodia, on one map, in Khmer and English. A model's estimate, explained plainly, with advice from the official tables. Free.

The air reading is a model's estimate, not a sensor on your street. It comes from the European Union's Copernicus service, in squares about 45 km wide, so the air where you stand can be better or worse.

"Now" is worked out the way the United States' air agency does it: the last twelve hours, weighted toward the newest.

Heat is the United States weather service's heat index: the temperature in the shade once humidity is counted.

The advice is the wording of those two agencies and of the World Health Organization, shortened. It is not medical advice.

The map colours each province by the reading at its provincial town. The provinces' outlines are the work of OpenStreetMap's contributors, through geoBoundaries.

Questions people ask

Why does another app show a different number?

An app that reads sensors shows the air at each sensor. This page shows a model's estimate for a wide area. Both can be right about different things.

Which places can I see?

Phnom Penh and the 24 provinces, each read at its provincial town.

How often does it change?

The page asks for a new reading when you open it, and again every half hour for as long as it stays open. The model behind it is run a few times a day.

Where does my data go?

The page keeps your chosen province in your browser. To get a reading your browser asks Open-Meteo, the service that publishes the data. It sees your IP address and the province's coordinates, not who you are.

Is it free?

Yes. No account and no advertising.