SmogRank / Germany / Schleswig-Holstein / Westerland

Westerland, month by month

Westerland has a measured daily mean on 151 days since 1 June 2024. Its worst month was December 2024, at 46 US AQI (8.3 µg/m³), 1,275th of 2,616 cities on that month's world ranking. Its cleanest was June 2024, at 43 US AQI (7.8 µg/m³).

Every month since 2024

2026too few days for a mean (a year needs 199)14 days measured
Jan4 daysFebnoneMarnoneAprnoneMay3 daysJun3 daysJulnoneAugnoneSep1 dayOct3 days
2025too few days for a mean (a year needs 256)8 days measured
Jan8 daysFebnoneMarnoneAprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOctnoneNovnoneDecnone
2024too few days for a mean (a year needs 257)129 days measured
JanFebMarAprMayJun43#1,392Jul21 daysAug15 daysSepnoneOct15 daysNov46#1,296Dec46#1,275
Each square is a month's mean PM2.5 in US AQI from Westerland's measured days, with its place on that month's world ranking under it. A month has a mean once 70% of its days are measured, the rule the monthly rankings use; under that, the square gives the days measured. Each square opens that month's ranking with Westerland marked; each year, the year's.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

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

26 months
MonthWhy
Oct 20263 of 11 days measured; a month needs 8. The others: 3 with no readings from the monitor, 4 with readings for part of the day (a day needs 18 hours), 1 with under 18 hours of readings or readings that failed our checks.
Sep 20261 of 30 days measured; a month needs 21. The others: 1 with no readings from the monitor, 28 with readings for part of the day (a day needs 18 hours).
Aug 2026No day measured. The others: 31 with readings for part of the day (a day needs 18 hours).
Jul 2026No day measured. The others: 31 with readings for part of the day (a day needs 18 hours).
Jun 20263 of 30 days measured; a month needs 21. The others: 7 with no readings from the monitor, 20 with readings for part of the day (a day needs 18 hours).
May 20263 of 31 days measured; a month needs 22. The others: 1 with no readings from the monitor, 27 with readings for part of the day (a day needs 18 hours).
Apr 2026No day measured. The others: 30 with readings for part of the day (a day needs 18 hours).
Mar 2026No day measured. The others: 31 with readings for part of the day (a day needs 18 hours).
Feb 2026No day measured. The others: 28 with readings for part of the day (a day needs 18 hours).
Jan 20264 of 31 days measured; a month needs 22. The others: 27 with readings for part of the day (a day needs 18 hours).
Dec 2025No day measured. The others: 31 with readings for part of the day (a day needs 18 hours).
Nov 2025No day measured. The others: 30 with readings for part of the day (a day needs 18 hours).
Oct 2025No day measured. The others: 31 with readings for part of the day (a day needs 18 hours).
Sep 2025No day measured. The others: 8 with no readings from the monitor, 22 with readings for part of the day (a day needs 18 hours).
Aug 2025No day measured. The others: 31 with readings for part of the day (a day needs 18 hours).
Jul 2025No day measured. The others: 8 with no readings from the monitor, 23 with readings for part of the day (a day needs 18 hours).
Jun 2025No day measured. The others: 30 with no readings from the monitor.
May 2025No day measured. The others: 30 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours).
Apr 2025No day measured. The others: 7 with no readings from the monitor, 23 with readings for part of the day (a day needs 18 hours).
Mar 2025No day measured. The others: 1 with no readings from the monitor, 30 with readings for part of the day (a day needs 18 hours).
Feb 2025No day measured. The others: 28 with readings for part of the day (a day needs 18 hours).
Jan 20258 of 31 days measured; a month needs 22. The others: 3 with no readings from the monitor, 20 with readings for part of the day (a day needs 18 hours).
Oct 202415 of 31 days measured; a month needs 22. The others: 16 with readings for part of the day (a day needs 18 hours).
Sep 2024No day measured. The others: 30 with readings for part of the day (a day needs 18 hours).
Aug 202415 of 31 days measured; a month needs 22. The others: 1 with no readings from the monitor, 15 with readings for part of the day (a day needs 18 hours).
Jul 202421 of 31 days measured; a month needs 22. The others: 1 with no readings from the monitor, 9 with readings for part of the day (a day needs 18 hours).

A day counts once 18 hours of it are measured; a month needs 70% of its days.

Westerland's worst months

MonthUS AQIDays measuredWorld rankEpisode
December 2024 468.3 µg/m³26 of 311,275thof 2,616–
November 2024 468.2 µg/m³26 of 301,296thof 2,624Europe, November 2024
June 2024 437.8 µg/m³26 of 301,392ndof 2,563–

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.

Westerland's worst days

DayUS AQIEpisode
23 Jan 2026 13649.8 µg/m³–
22 Jan 2026 9935.0 µg/m³–
25 Jan 2026 9432.0 µg/m³–
21 Jan 2026 9030.0 µg/m³–
9 Nov 2024 8225.5 µg/m³Europe, November 2024
19 Oct 2024 7923.9 µg/m³–
10 Nov 2024 7421.3 µg/m³Europe, November 2024
26 Oct 2024 7320.8 µg/m³–
7 Nov 2024 6717.8 µg/m³Europe, November 2024
25 Jun 2024 6617.2 µg/m³–

Daily means, the highest since 1 Jun 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, Westerland, Germany, 1 Jun 2024 – 10 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/de/westerland/history (accessed 12 Oct 2026).

Download chart (PNG)

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.

Westerland now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-12 18:07 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).