SmogRank / Rio Claro / São José dos Campos

Rio Claro vs São José dos Campos: PM2.5 compared

Over the last year, Rio Claro's air was about 1.6× as polluted as São José dos Campos's: PM2.5 averaged 14.2 µg/m³ against 9.0, on the 321 days both cities were measured. Rio Claro had the dirtier air on 282 of those days, São José dos Campos on 38. Rio Claro was over the WHO's daily guideline of 15 µg/m³ on 113 of them, São José dos Campos on 25.

Right now

Rio Claro#391on the 24-hour board of 2,408, at 58 US AQI (13.0 µg/m³)
São José dos Campos–no readings since 8 Oct

The last year, day by day

Rio Claro
São José dos Campos
Each city's daily mean from 12 Oct 2025 to 11 Oct 2026, one stripe a day, coloured by band. A blank stripe is a day without a daily mean.

Month by month

Rio Claro, Nov 2025: 12.8 µg/m³São José dos Campos, Nov 2025: 8.7 µg/m³Nov2025Rio Claro, Dec 2025: 10.4 µg/m³São José dos Campos, Dec 2025: 8.9 µg/m³DecRio Claro, Jan 2026: 9.1 µg/m³São José dos Campos, Jan 2026: 6.9 µg/m³Jan2026Rio Claro, Feb 2026: 9.2 µg/m³São José dos Campos, Feb 2026: 6.9 µg/m³FebRio Claro, Mar 2026: 13.7 µg/m³São José dos Campos, Mar 2026: 8.6 µg/m³MarRio Claro, Apr 2026: 17.3 µg/m³São José dos Campos, Apr 2026: 9.8 µg/m³AprRio Claro, May 2026: 13.1 µg/m³São José dos Campos, May 2026: 7.2 µg/m³MayRio Claro, Jun 2026: 16.0 µg/m³São José dos Campos, Jun 2026: 10.3 µg/m³JunRio Claro, Jul 2026: 17.7 µg/m³São José dos Campos, Jul 2026: 11.6 µg/m³JulRio Claro, Aug 2026: 21.9 µg/m³São José dos Campos, Aug 2026: 12.1 µg/m³AugRio Claro, Sep 2026: 14.3 µg/m³São José dos Campos, Sep 2026: 7.9 µg/m³SepOct
Monthly means in µg/m³ over the days both cities were measured. Solid: Rio Claro. Faded: São José dos Campos. A month shows once both share 10 such days. Dashed line: the WHO daily guideline, 15 µg/m³.

Year by year

YearRio ClaroSão José dos CamposDays both measuredDays Rio Claro was worse
2026 so far6251255227
20256452343318
20247258331301
20236755257240

Means in US AQI over the days both cities were measured that year; a year shows once they share 30 such days.

Each city's worst days

Rio Claro

São José dos Campos

Daily means in US AQI, with µg/m³ beside them, since the index stops at its top value, over the days both cities were measured in the last year. Each date opens that day's world board.

Compare either city with another

Rio Claro

Side by side with Limeira (the nearest), Nilópolis (Brazil's 2nd worst on 30 days), Gujranwala (the world's worst on 30 days).

São José dos Campos

Side by side with Taubaté (the nearest), Gujranwala (the world's worst on 30 days).

Use this page

SmogRank, PM2.5 daily means compared, Rio Claro and São José dos Campos, 12 Oct 2025 – 11 Oct 2026, smogrank.com/compare/br-rio-claro/br-sao-jose-dos-campos (accessed 12 Oct 2026).

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.

The same rules as every SmogRank figure: reference monitors first, and a day counts with 18 measured hours. How we measure.

Updated 2026-10-12 20:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.