SmogRank / Portugal / Vila Real / Vila Real

Vila Real, month by month

Vila Real has a measured daily mean on 784 days since 1 January 2023. Its worst month was July 2026, at 28 US AQI (5.1 µg/m³), 2,581st of 2,784 cities on that month's world ranking. Its cleanest was September 2023, at 4 US AQI (0.7 µg/m³).

Every month since 2023

202620 so far227 days measured2,768th of 2,791 in the world
Jan12 daysFeb8 daysMar18#2,903Apr24#2,656May19#2,760Jun22#2,300Jul28#2,581Aug22#2,849Sep21#2,791Oct11#2,713
2025too few days for a mean (a year needs 256)161 days measured
Jan17 daysFeb8#2,629Mar12 daysApr13 daysMay18 daysJun16 daysJul16 daysAug17 daysSep6 daysOct7 daysNov1 dayDec16 days
2024too few days for a mean (a year needs 257)193 days measured
Jan11#2,378Feb19 daysMar15 daysApr12#2,496May6#2,680Jun10 daysJul13 daysAug13 daysSepnoneOct5 daysNov18 daysDec21 days
2023too few days for a mean (a year needs 256)203 days measured
Jan7 daysFeb2 daysMar11 daysApr15 daysMaynoneJun13#1,588Jul9#1,430Aug15 daysSep4#2,176Oct16#1,988Nov9#2,236Dec8#2,242
Each square is a month's mean PM2.5 in US AQI from Vila Real's measured days, with its place on that month's world ranking under it. A month has a mean once 70% of its days are measured, the rule the monthly rankings use; under that, the square gives the days measured. Each square opens that month's ranking with Vila Real marked; each year, the year's. A dashed square is the running month, so far.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Months without a mean, and why

28 months
MonthWhy
Feb 20268 of 28 days measured; a month needs 20. The others: 20 with under 18 hours of readings or readings that failed our checks.
Jan 202612 of 31 days measured; a month needs 22. The others: 19 with under 18 hours of readings or readings that failed our checks.
Dec 202516 of 31 days measured; a month needs 22. The others: 15 with under 18 hours of readings or readings that failed our checks.
Nov 20251 of 30 days measured; a month needs 21. The others: 29 with under 18 hours of readings or readings that failed our checks.
Oct 20257 of 31 days measured; a month needs 22. The others: 24 with under 18 hours of readings or readings that failed our checks.
Sep 20256 of 30 days measured; a month needs 21. The others: 24 with under 18 hours of readings or readings that failed our checks.
Aug 202517 of 31 days measured; a month needs 22. The others: 14 with under 18 hours of readings or readings that failed our checks.
Jul 202516 of 31 days measured; a month needs 22. The others: 15 with under 18 hours of readings or readings that failed our checks.
Jun 202516 of 30 days measured; a month needs 21. The others: 14 with under 18 hours of readings or readings that failed our checks.
May 202518 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks.
Apr 202513 of 30 days measured; a month needs 21. The others: 17 with under 18 hours of readings or readings that failed our checks.
Mar 202512 of 31 days measured; a month needs 22. The others: 19 with under 18 hours of readings or readings that failed our checks.
Jan 202517 of 31 days measured; a month needs 22. The others: 14 with under 18 hours of readings or readings that failed our checks.
Dec 202421 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks.
Nov 202418 of 30 days measured; a month needs 21. The others: 12 with under 18 hours of readings or readings that failed our checks.
Oct 20245 of 31 days measured; a month needs 22. The others: 26 with under 18 hours of readings or readings that failed our checks.
Sep 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 202413 of 31 days measured; a month needs 22. The others: 18 with under 18 hours of readings or readings that failed our checks.
Jul 202413 of 31 days measured; a month needs 22. The others: 18 with under 18 hours of readings or readings that failed our checks.
Jun 202410 of 30 days measured; a month needs 21. The others: 20 with under 18 hours of readings or readings that failed our checks.
Mar 202415 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks.
Feb 202419 of 29 days measured; a month needs 21. The others: 10 with under 18 hours of readings or readings that failed our checks.
Aug 202315 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks.
May 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 202315 of 30 days measured; a month needs 21. The others: 3 missing from OpenAQ's archive, 12 with under 18 hours of readings or readings that failed our checks.
Mar 202311 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive.
Feb 20232 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive, 1 with under 18 hours of readings or readings that failed our checks.
Jan 20237 of 31 days measured; a month needs 22. The others: 7 missing from OpenAQ's archive, 17 with under 18 hours of readings or readings that failed our checks.

A day counts once 18 hours of it are measured; a month needs 70% of its days.

Vila Real's worst months

MonthUS AQIDays measuredWorld rank
July 2026 285.1 µg/m³29 of 312,581stof 2,784
April 2026 244.3 µg/m³28 of 302,656thof 2,941
June 2026 224.0 µg/m³25 of 302,300thof 2,497
August 2026 223.9 µg/m³30 of 312,849thof 2,896
September 2026 213.8 µg/m³28 of 302,791stof 2,981
May 2026 193.4 µg/m³30 of 312,760thof 2,874

Monthly means over the days measured; finished months only. World rank: its place on that month's world ranking of every city with enough days. Each month opens that ranking.

Vila Real's worst days

DayUS AQIEpisode
15 Aug 2025 13950.8 µg/m³Spain, Portugal and Andorra, August 2025
16 Aug 2025 8627.8 µg/m³Spain, Portugal and Andorra, August 2025
14 Aug 2025 8326.1 µg/m³Spain, Portugal and Andorra, August 2025
29 Jul 2026 7320.9 µg/m³–
10 Apr 2026 7120.1 µg/m³–
11 Aug 2025 6617.4 µg/m³Spain, Portugal and Andorra, August 2025
12 Aug 2025 6617.1 µg/m³Spain, Portugal and Andorra, August 2025
18 Dec 2024 6516.4 µg/m³–
26 Nov 2023 6416.3 µg/m³–
18 Aug 2026 6315.6 µg/m³–

Daily means, the highest since 1 Jan 2023; the WHO's daily guideline is 15 µg/m³. Each date opens that day's world ranking, and each episode the bad-air spell it was part of.

Use this history

SmogRank, PM2.5 monthly and daily means, Vila Real, Portugal, 1 Jan 2023 – 11 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/pt/vila-real/history (accessed 12 Oct 2026).

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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.

Vila Real now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-12 18:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).