SmogRank / United States / California / Woodland
Woodland, month by month
Woodland has a measured daily mean on 1,197 days since 1 January 2023. Its worst month was December 2024, at 65 US AQI (16.5 µg/m³), 400th of 2,616 cities on that month's world ranking. Its cleanest was March 2024, at 18 US AQI (3.3 µg/m³). 2025 averaged 51 US AQI (9.2 µg/m³), against 44 US AQI (7.9 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
7 months
| Month | Why |
|---|---|
| Oct 2026 | No day measured. The others: 11 with no readings from the monitor. |
| Sep 2026 | 14 of 30 days measured; a month needs 21. The others: 12 with no readings from the monitor, 2 with readings for part of the day (a day needs 18 hours), 1 with readings left out by our checks, 1 with under 18 hours of readings or readings that failed our checks. |
| Aug 2026 | 14 of 31 days measured; a month needs 22. The others: 17 with under 18 hours of readings or readings that failed our checks. |
| Jul 2026 | 5 of 31 days measured; a month needs 22. The others: 26 with under 18 hours of readings or readings that failed our checks. |
| Jul 2023 | 21 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks. |
| Jun 2023 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| May 2023 | 9 of 31 days measured; a month needs 22. The others: 22 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.
Woodland's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| December 2024 | 6516.5 µg/m³ | 400thof 2,616 | California, United States, December 2024 California and Oregon, United States, December 2024 |
| January 2026 | 6214.8 µg/m³ | 769thof 2,617 | California, United States, 26 to 27 January 2026 California and Oregon, United States, January 2026 |
| January 2025 | 5913.5 µg/m³ | 580thof 2,474 | – |
| November 2024 | 5611.6 µg/m³ | 614thof 2,624 | – |
| December 2025 | 5511.4 µg/m³ | 1,056thof 3,006 | – |
| November 2023 | 5511.1 µg/m³ | 416thof 2,243 | – |
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.
Woodland's worst days
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, Woodland, United States, 1 Jan 2023 – 16 Sep 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/woodland/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.
Woodland now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 04:07 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).