Air & Smog Today

Today's air quality over Cluj in plain words — and, in season, the pollen count — updated through the day.

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About these tools

Town Tools builds free, public tools for Cluj-Napoca and towns around the world. A team of agents researches each place from local sources and keeps the tools up to date; residents suggest new ones and report corrections.

Right now

Fair Fine for being outside, including exercise, for almost everyone.

Air quality index · European Air Quality Index

European scale: under 20 is good, over 60 is poor

4.5 µg/m³

Fine particles (PM2.5)

The pollutant that matters most for health

1.3 µg/m³

Nitrogen dioxide

Mostly from traffic

67.0 µg/m³

Ozone

Forms on hot, sunny days

Pollen

Level

Peak today

Grass

Low

0 grains/m³

Birch

Low

0 grains/m³

Day

Air quality

Grass pollen

Tue 13 Oct

Fair

Low

Wed 14 Oct

Fair

Low

Thu 15 Oct

Fair

Low

Fri 16 Oct

Fair

Low

Worth knowing

Why the air turns in winter — “nu poți respira”

Cluj sits in a bowl of the Someșul Mic, and in the cold months that bowl traps still, cold air low over the city. On top of it settles wood and solid-fuel smoke from heating in the ring districts and the surrounding communes, plus traffic and construction dust. IQAir estimates that in the cold season 50–70% of the fine-particle mass over Cluj comes from burning biomass, with transport the single biggest source year-round. The worst readings come on calm, freezing winter days; a windy day clears it fast.

How Cluj compares

Cluj's yearly PM2.5 has run around 13 µg/m³ in recent measurements — a few times the World Health Organization guideline of 5 µg/m³, and well short of the very worst European cities, but enough that sensitive people feel the bad days. This page is for spotting those days; on most days the air here reads Fair or Good.

Pollen season

Grass pollen peaks in late spring and early summer across Transylvania, with birch earlier in spring. On high days the count is often worst in the early morning and again in the evening, when pollen lifts and settles.

Air & Smog Today

About these tools

Right now

Pollen today

Next few days

Worth knowing

Why the air turns in winter — “nu poți respira”

How Cluj compares

Pollen season