SmogRank / United States / Texas / Helotes
Helotes, month by month
Helotes has a measured daily mean on 1,162 days since 7 May 2023. Its worst month was May 2024, at 74 US AQI (21.5 µg/m³), 127th of 2,684 cities on that month's world ranking. Its cleanest was October 2023, at 28 US AQI (5.1 µg/m³). 2025 averaged 51 US AQI (9.1 µg/m³), against 52 US AQI (9.9 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
1 month
| Month | Why |
|---|---|
| Mar 2024 | 20 of 31 days measured; a month needs 22. The others: 7 with no readings from the monitor, 3 with readings for part of the day (a day needs 18 hours), 1 missing from OpenAQ's archive. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Helotes's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| May 2024 | 7421.5 µg/m³ | 127thof 2,684 | Southern United States and Mexico, 19 to 28 May 2024 Southern United States and Mexico, 7 to 10 May 2024 |
| June 2023 | 5913.4 µg/m³ | 461stof 1,603 | Southern United States and Mexico, June 2023 |
| July 2023 | 5813.0 µg/m³ | 284thof 1,432 | – |
| May 2025 | 5813.0 µg/m³ | 518thof 2,826 | Southern United States and Mexico, May 2025 |
| April 2024 | 5812.6 µg/m³ | 645thof 2,520 | Texas, United States, April 2024 |
| July 2026 | 5812.6 µg/m³ | 791stof 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.
Helotes's worst days
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, Helotes, 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/helotes/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.
Helotes 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).