SmogRank / United States / California / Lincoln
Lincoln, month by month
Lincoln, California has a measured daily mean on 1,272 days since 1 January 2023. Its worst month was January 2026, at 56 US AQI (11.9 µg/m³), 931st of 2,617 cities on that month's world ranking. Its cleanest was April 2023, at 18 US AQI (3.3 µg/m³). 2025 averaged 39 US AQI (7.1 µg/m³), against 32 US AQI (5.8 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
3 months
| Month | Why |
|---|---|
| Jun 2024 | 20 of 30 days measured; a month needs 21. The others: 10 with under 18 hours of readings or readings that failed our checks. |
| 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.
Lincoln's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| January 2026 | 5611.9 µg/m³ | 931stof 2,617 | – |
| January 2025 | 5410.5 µg/m³ | 909thof 2,474 | – |
| December 2025 | 5410.5 µg/m³ | 1,232ndof 3,006 | California, United States, December 2025 |
| November 2025 | 519.2 µg/m³ | 1,202ndof 2,715 | – |
| September 2023 | 519.1 µg/m³ | 775thof 2,176 | California and Oregon, United States, September 2023 |
| December 2023 | 498.9 µg/m³ | 980thof 2,247 | – |
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.
Lincoln's worst days
| Day | US AQI | Episode |
|---|---|---|
| 20 Sept 2023 | 9432.4 µg/m³ | California and Oregon, United States, September 2023 |
| 22 Sept 2023 | 8527.3 µg/m³ | California and Oregon, United States, September 2023 |
| 6 Dec 2025 | 8326.5 µg/m³ | California, United States, December 2025 |
| 21 Sept 2023 | 8125.2 µg/m³ | California and Oregon, United States, September 2023 |
| 11 Dec 2024 | 7723.3 µg/m³ | – |
| 31 Aug 2023 | 7421.6 µg/m³ | – |
| 30 Aug 2023 | 7321.0 µg/m³ | – |
| 6 Feb 2026 | 7321.0 µg/m³ | – |
| 14 Jan 2026 | 7320.8 µg/m³ | – |
| 23 Sept 2023 | 7220.2 µg/m³ | California and Oregon, United States, 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, Lincoln, California, 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/lincoln-california/history (accessed 13 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.
Lincoln now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 02:07 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).