SmogRank / United States / California / Lake Elsinore
Lake Elsinore, month by month
Lake Elsinore has a measured daily mean on 1,276 days since 1 January 2023. Its worst month was December 2024, at 58 US AQI (12.9 µg/m³), 605th of 2,616 cities on that month's world ranking. Its cleanest was January 2023, at 22 US AQI (3.9 µg/m³). 2025 averaged 43 US AQI (7.8 µg/m³), against 50 US AQI (9.0 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 |
|---|---|
| Mar 2023 | 11 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive. |
| Feb 2023 | 1 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive, 2 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.
Lake Elsinore's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| December 2024 | 5812.9 µg/m³ | 605thof 2,616 | California, United States, December 2024 California and Oregon, United States, December 2024 |
| July 2026 | 5812.9 µg/m³ | 739thof 2,784 | – |
| September 2024 | 5611.8 µg/m³ | 289thof 2,010 | – |
| July 2024 | 5611.6 µg/m³ | 471stof 2,566 | – |
| January 2024 | 5511.5 µg/m³ | 742ndof 2,385 | California and Nevada, United States, January 2024 |
| June 2025 | 5511.4 µg/m³ | 913thof 2,508 | – |
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.
Lake Elsinore's worst days
| Day | US AQI | Episode |
|---|---|---|
| 9 Sept 2024 | 10336.4 µg/m³ | – |
| 10 Sept 2024 | 10336.4 µg/m³ | – |
| 17 Jan 2024 | 10336.3 µg/m³ | California and Nevada, United States, January 2024 |
| 7 Jul 2026 | 9633.3 µg/m³ | – |
| 22 Dec 2024 | 9230.9 µg/m³ | California, United States, December 2024 |
| 5 Dec 2024 | 8527.3 µg/m³ | California and Oregon, United States, December 2024 |
| 6 Jul 2026 | 8527.1 µg/m³ | – |
| 4 Dec 2024 | 8326.2 µg/m³ | California and Oregon, United States, December 2024 |
| 8 Aug 2025 | 8225.6 µg/m³ | – |
| 29 Dec 2024 | 7622.7 µg/m³ | – |
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, Lake Elsinore, 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/lake-elsinore/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.
Lake Elsinore 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).