SmogRank / Honduras / Cortés Department / San Pedro Sula

San Pedro Sula, month by month

San Pedro Sula has a measured daily mean on 293 days since 9 December 2025. Its worst month was May 2026, at 88 US AQI (28.7 µg/m³), 190th of 2,874 cities on that month's world ranking. Its cleanest was December 2025, at 43 US AQI (7.8 µg/m³).

Every month since 2025

202660 so far270 days measured617th of 2,798 in the world
Jan61#786Feb17 daysMar49#1,903Apr56#723May88#190Jun59#411Jul54#1,211Aug53#895Sep58#465Oct62#216
2025too few days for a mean (a year needs 256)23 days measured
JanFebMarAprMayJunJulAugSepOctNovDec43#1,902
Each square is a month's mean PM2.5 in US AQI from San Pedro Sula'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 San Pedro Sula 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

1 month
MonthWhy
Feb 202617 of 28 days measured; a month needs 20. The others: 11 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.

San Pedro Sula's worst months

MonthUS AQIDays measuredWorld rank
May 2026 8828.7 µg/m³31 of 31190thof 2,874
January 2026 6114.4 µg/m³31 of 31786thof 2,617
June 2026 5913.2 µg/m³27 of 30411thof 2,497
September 2026 5812.6 µg/m³30 of 30465thof 2,997
April 2026 5612.0 µg/m³30 of 30723rdof 2,941
July 2026 5410.6 µg/m³31 of 311,211thof 2,784

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.

San Pedro Sula's worst days

DayUS AQI
9 May 2026 15256.4 µg/m³
7 May 2026 12645.7 µg/m³
6 May 2026 12545.1 µg/m³
10 May 2026 11942.7 µg/m³
27 Apr 2026 11641.5 µg/m³
8 May 2026 11541.1 µg/m³
16 May 2026 11340.4 µg/m³
1 Jan 2026 11239.9 µg/m³
5 May 2026 11139.4 µg/m³
23 May 2026 10838.4 µg/m³

Daily means, the highest since 9 Dec 2025; 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, San Pedro Sula, Honduras, 9 Dec 2025 – 11 Oct 2026. Monitor data from AirGradient via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/hn/san-pedro-sula/history (accessed 13 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.

San Pedro Sula now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-13 02:07 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).