SmogRank / United States / Nebraska / Scottsbluff
Scottsbluff, month by month
Scottsbluff has a measured daily mean on 919 days since 1 January 2023. Its worst month was May 2023, at 56 US AQI (11.7 µg/m³), 287th of 1,600 cities on that month's world ranking. Its cleanest was January 2026, at 14 US AQI (2.6 µg/m³).
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
16 months
| Month | Why |
|---|---|
| Dec 2025 | 20 of 31 days measured; a month needs 22. The others: 8 with no readings from the monitor, 3 with readings for part of the day (a day needs 18 hours). |
| Nov 2025 | 9 of 30 days measured; a month needs 21. The others: 15 with no readings from the monitor, 6 with readings for part of the day (a day needs 18 hours). |
| Aug 2025 | 11 of 31 days measured; a month needs 22. The others: 19 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours). |
| Jan 2025 | 2 of 31 days measured; a month needs 22. The others: 1 with readings for part of the day (a day needs 18 hours), 28 with under 18 hours of readings or readings that failed our checks. |
| Dec 2024 | No day measured. The others: 31 with no readings from the monitor. |
| Nov 2024 | No day measured. The others: 30 with no readings from the monitor. |
| Oct 2024 | No day measured. The others: 31 with no readings from the monitor. |
| Sep 2024 | No day measured. The others: 30 with no readings from the monitor. |
| Aug 2024 | 8 of 31 days measured; a month needs 22. The others: 22 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours). |
| Jun 2024 | 19 of 30 days measured; a month needs 21. The others: 10 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours). |
| May 2024 | 3 of 31 days measured; a month needs 22. The others: 26 with no readings from the monitor, 2 with readings for part of the day (a day needs 18 hours). |
| Apr 2024 | 18 of 30 days measured; a month needs 21. The others: 6 with no readings from the monitor, 6 with readings for part of the day (a day needs 18 hours). |
| Jan 2024 | 13 of 31 days measured; a month needs 22. The others: 5 with no readings from the monitor, 13 with readings for part of the day (a day needs 18 hours). |
| Nov 2023 | 12 of 30 days measured; a month needs 21. The others: 15 with no readings from the monitor, 3 with readings for part of the day (a day needs 18 hours). |
| Mar 2023 | 10 of 31 days measured; a month needs 22. The others: 1 with readings for part of the day (a day needs 18 hours), 20 missing from OpenAQ's archive. |
| Feb 2023 | 3 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.
Scottsbluff's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| May 2023 | 5611.7 µg/m³ | 287thof 1,600 | North-western United States and Canada, May 2023 Northern United States and Canada, May 2023 |
| December 2023 | 5511.4 µg/m³ | 483rdof 2,247 | – |
| March 2026 | 529.5 µg/m³ | 1,777thof 2,971 | – |
| July 2024 | 448.0 µg/m³ | 1,348thof 2,566 | North-western United States and Canada, July 2024 |
| August 2026 | 417.4 µg/m³ | 1,911thof 2,896 | – |
| September 2023 | 417.3 µg/m³ | 1,385thof 2,176 | Northern United States and Canada, August and September 2023 North-western Canada and United States, September 2023 |
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.
Scottsbluff's worst days
| Day | US AQI | Episode |
|---|---|---|
| 18 May 2023 | 219144.0 µg/m³ | Northern United States and Canada, May 2023 |
| 12 Mar 2026 | 16677.5 µg/m³ | – |
| 2 Jan 2024 | 14252.1 µg/m³ | – |
| 15 Jan 2024 | 12244.0 µg/m³ | – |
| 27 Dec 2023 | 10537.1 µg/m³ | – |
| 6 Sept 2023 | 10436.8 µg/m³ | Northern United States and Canada, August and September 2023 North-western Canada and United States, September 2023 |
| 19 May 2023 | 9432.2 µg/m³ | North-western United States and Canada, May 2023 Northern United States and Canada, May 2023 |
| 25 Mar 2026 | 9331.7 µg/m³ | – |
| 26 Oct 2023 | 9230.9 µg/m³ | – |
| 5 Sept 2023 | 9130.8 µg/m³ | Northern United States and Canada, August and September 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, Scottsbluff, United States, 1 Jan 2023 – 11 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/scottsbluff/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.
Scottsbluff now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 19:07 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).