SmogRank / Greece / Thessaly / Volos

Volos, month by month

Volos has a measured daily mean on 611 days since 1 January 2023. Its worst month was December 2023, at 105 US AQI (37.1 µg/m³), 41st of 2,247 cities on that month's world ranking. Its cleanest was September 2026, at 41 US AQI (7.4 µg/m³).

Every month since 2023

202657 so far216 days measured695th of 2,791 in the world
Jan80#254Feb60#863Mar64#748Apr18 daysMay52#794Jun14 daysJul11 daysAug52#997Sep41#1,154Oct47#858
2025too few days for a mean (a year needs 256)196 days measured
JannoneFebnoneMar13 daysApr53#1,078May15 daysJun19 daysJul50#1,519Aug18 daysSep16 daysOct19 daysNov20 daysDec78#387
2024too few days for a mean (a year needs 257)146 days measured
Jan82#170Feb18 daysMarnoneApr13 daysMay14 daysJun52#823Jul51#951Aug15 daysSepnoneOctnoneNovnoneDecnone
2023too few days for a mean (a year needs 256)53 days measured
Jan99#46Feb3 daysMarnoneApr3 daysMaynoneJunnoneJul1 dayAugnoneSepnoneOctnoneNovnoneDec105#41
Each square is a month's mean PM2.5 in US AQI from Volos'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 Volos 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

31 months
MonthWhy
Jul 202611 of 31 days measured; a month needs 22. The others: 20 with under 18 hours of readings or readings that failed our checks.
Jun 202614 of 30 days measured; a month needs 21. The others: 16 with under 18 hours of readings or readings that failed our checks.
Apr 202618 of 30 days measured; a month needs 21. The others: 12 with under 18 hours of readings or readings that failed our checks.
Nov 202520 of 30 days measured; a month needs 21. The others: 10 with under 18 hours of readings or readings that failed our checks.
Oct 202519 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks.
Sep 202516 of 30 days measured; a month needs 21. The others: 14 with under 18 hours of readings or readings that failed our checks.
Aug 202518 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks.
Jun 202519 of 30 days measured; a month needs 21. The others: 11 with under 18 hours of readings or readings that failed our checks.
May 202515 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks.
Mar 202513 of 31 days measured; a month needs 22. The others: 18 with under 18 hours of readings or readings that failed our checks.
Feb 2025No day measured. The others: 28 with under 18 hours of readings or readings that failed our checks.
Jan 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Dec 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Nov 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Oct 2024No day measured. The others: 31 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 202415 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks.
May 202414 of 31 days measured; a month needs 22. The others: 17 with under 18 hours of readings or readings that failed our checks.
Apr 202413 of 30 days measured; a month needs 21. The others: 17 with under 18 hours of readings or readings that failed our checks.
Mar 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Feb 202418 of 29 days measured; a month needs 21. The others: 11 with under 18 hours of readings or readings that failed our checks.
Nov 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Oct 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Sep 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 20231 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks.
Jun 2023No day measured. The others: 30 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 20233 of 30 days measured; a month needs 21. The others: 27 with under 18 hours of readings or readings that failed our checks.
Mar 2023No day measured. The others: 20 missing from OpenAQ's archive, 11 with under 18 hours of readings or readings that failed our checks.
Feb 20233 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive.

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

Volos's worst months

MonthUS AQIDays measuredWorld rankEpisode
December 2023 10537.1 µg/m³23 of 3141stof 2,247South-eastern Europe, 28 December 2023 to 1 January 2024
South-eastern Europe, 11 to 13 December 2023
January 2023 9935.1 µg/m³23 of 3146thof 1,261Eastern Europe, January 2023
January 2024 8225.6 µg/m³30 of 31170thof 2,385Europe, 27 January to 2 February 2024
Europe, 8 to 27 January 2024and 1 more
January 2026 8024.7 µg/m³26 of 31254thof 2,617Europe, January and February 2026
December 2025 7823.7 µg/m³26 of 31387thof 3,006–
March 2026 6416.2 µg/m³31 of 31748thof 2,971–

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.

Volos's worst days

DayUS AQIEpisode
6 Jan 2023 17995.5 µg/m³Eastern Europe, January 2023
17 Mar 2025 17082.9 µg/m³–
4 Jan 2023 16474.5 µg/m³Eastern Europe, January 2023
1 Jan 2024 16169.9 µg/m³South-eastern Europe, 28 December 2023 to 1 January 2024
9 Jan 2023 15967.5 µg/m³–
2 Jan 2026 15866.0 µg/m³–
25 Jan 2023 15865.8 µg/m³–
2 Jan 2024 15764.2 µg/m³–
13 Dec 2023 15662.8 µg/m³South-eastern Europe, 11 to 13 December 2023
3 Jan 2023 15560.6 µg/m³Eastern Europe, January 2023

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, Volos, Greece, 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/gr/volos/history (accessed 12 Oct 2026).

Download chart (PNG)

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.

Volos 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).