SmogRank / United States / Colorado / Pueblo
Pueblo, month by month
Pueblo, Colorado has a measured daily mean on 964 days since 22 January 2024. Its worst month was August 2026, at 47 US AQI (8.4 µg/m³), 1,422nd of 2,896 cities on that month's world ranking. Its cleanest was February 2024, at 19 US AQI (3.4 µg/m³). 2025 averaged 29 US AQI (5.2 µg/m³), against 26 US AQI (4.7 µg/m³) in 2024.
Every month since 2024
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 |
|---|---|
| Jan 2024 | 9 of 31 days measured; a month needs 22. The others: 1 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.
Pueblo's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| August 2026 | 478.4 µg/m³ | 1,422ndof 2,896 | North-western United States and Canada, July and August 2026 |
| July 2026 | 458.1 µg/m³ | 1,848thof 2,784 | North-western United States and Canada, July and August 2026 |
| October 2024 | 447.9 µg/m³ | 830thof 2,020 | – |
| August 2025 | 427.6 µg/m³ | 1,940thof 2,901 | – |
| July 2025 | 376.7 µg/m³ | 2,072ndof 2,889 | – |
| July 2024 | 356.3 µg/m³ | 1,899thof 2,566 | – |
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.
Pueblo's worst days
| Day | US AQI | Episode |
|---|---|---|
| 29 Jun 2026 | 9934.8 µg/m³ | – |
| 13 Mar 2026 | 8929.4 µg/m³ | – |
| 4 Aug 2026 | 8628.1 µg/m³ | North-western United States and Canada, July and August 2026 |
| 8 Oct 2024 | 7622.6 µg/m³ | – |
| 4 Jul 2025 | 7622.5 µg/m³ | – |
| 5 Sept 2025 | 6919.0 µg/m³ | – |
| 5 Jul 2026 | 6919.0 µg/m³ | – |
| 3 Aug 2026 | 6818.4 µg/m³ | North-western United States and Canada, July and August 2026 |
| 1 Jul 2026 | 6818.2 µg/m³ | – |
| 14 Aug 2025 | 6717.8 µg/m³ | – |
Daily means, the highest since 22 Jan 2024; 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, Pueblo, Colorado, United States, 22 Jan 2024 – 11 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/pueblo/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.
Pueblo now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 21:07 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).