SmogRank / United States / Texas / Galveston
Galveston, month by month
Galveston has a measured daily mean on 1,158 days since 7 May 2023. Its worst month was July 2023, at 62 US AQI (15.0 µg/m³), 143rd of 1,432 cities on that month's world ranking. Its cleanest was December 2025, at 28 US AQI (5.1 µg/m³). 2025 averaged 42 US AQI (7.6 µg/m³), against 41 US AQI (7.4 µg/m³) in 2024.
Every month since 2023
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
2 months
| Month | Why |
|---|---|
| Sep 2024 | 11 of 30 days measured; a month needs 21. The others: 19 with under 18 hours of readings or readings that failed our checks. |
| May 2023 | 21 of 31 days measured; a month needs 22. The others: 4 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.
Galveston's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| July 2023 | 6215.0 µg/m³ | 143rdof 1,432 | Texas, United States, July 2023 |
| June 2026 | 5611.9 µg/m³ | 487thof 2,497 | – |
| August 2023 | 5611.6 µg/m³ | 386thof 1,980 | – |
| July 2026 | 5511.3 µg/m³ | 1,051stof 2,784 | – |
| May 2024 | 5511.2 µg/m³ | 567thof 2,684 | Southern United States and Mexico, 19 to 28 May 2024 Southern United States and Mexico, 7 to 10 May 2024 |
| July 2025 | 5410.9 µg/m³ | 1,070thof 2,889 | – |
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.
Galveston's worst days
| Day | US AQI | Episode |
|---|---|---|
| 27 May 2024 | 9633.3 µg/m³ | Southern United States and Mexico, 19 to 28 May 2024 |
| 9 May 2024 | 9130.6 µg/m³ | Southern United States and Mexico, 7 to 10 May 2024 |
| 31 Jul 2024 | 8728.5 µg/m³ | Southern and eastern United States and Mexico, July and August 2024 |
| 15 Mar 2025 | 8527.5 µg/m³ | Eastern United States, March 2025 |
| 24 May 2023 | 8426.6 µg/m³ | Southern United States, May 2023 |
| 26 Jul 2023 | 8125.3 µg/m³ | Texas, United States, July 2023 |
| 27 Jul 2023 | 8024.5 µg/m³ | Texas, United States, July 2023 |
| 23 May 2023 | 7823.8 µg/m³ | Southern United States, May 2023 |
| 2 Jul 2024 | 7622.6 µg/m³ | – |
| 22 May 2023 | 7622.5 µg/m³ | Southern United States, May 2023 |
Daily means, the highest since 7 May 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, Galveston, United States, 7 May 2023 – 11 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/galveston/history (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.
Galveston now: the last 24 hours, its ranks today and the last 12 months day by day.
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. 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).