SmogRank / Germany / Saxony-Anhalt / Klötze
Klötze, month by month
Klötze has a measured daily mean on 951 days since 21 March 2023. Its worst month was February 2025, at 67 US AQI (17.7 µg/m³), 708th of 2,633 cities on that month's world ranking. Its cleanest was September 2025, at 18 US AQI (3.3 µg/m³). 2025 averaged 40 US AQI (7.2 µg/m³), against 42 US AQI (7.6 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
13 months
| Month | Why |
|---|---|
| Oct 2026 | 8 of 12 days measured; a month needs 9. The others: 1 with no readings from the monitor, 3 with readings for part of the day (a day needs 18 hours). |
| Jun 2026 | 16 of 30 days measured; a month needs 21. The others: 7 with no readings from the monitor, 7 with readings for part of the day (a day needs 18 hours). |
| Jun 2025 | 15 of 30 days measured; a month needs 21. The others: 15 with readings for part of the day (a day needs 18 hours). |
| Mar 2025 | 19 of 31 days measured; a month needs 22. The others: 12 with readings for part of the day (a day needs 18 hours). |
| Oct 2024 | 15 of 31 days measured; a month needs 22. The others: 16 with readings for part of the day (a day needs 18 hours). |
| Sep 2024 | No day measured. The others: 2 with no readings from the monitor, 28 with readings for part of the day (a day needs 18 hours). |
| Aug 2024 | 14 of 31 days measured; a month needs 22. The others: 1 with no readings from the monitor, 16 with readings for part of the day (a day needs 18 hours). |
| Mar 2024 | 15 of 31 days measured; a month needs 22. The others: 10 with no readings from the monitor, 6 with readings for part of the day (a day needs 18 hours). |
| Oct 2023 | 9 of 31 days measured; a month needs 22. The others: 21 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours). |
| Sep 2023 | 2 of 30 days measured; a month needs 21. The others: 22 with no readings from the monitor, 6 with readings for part of the day (a day needs 18 hours). |
| Aug 2023 | No day measured. The others: 31 with no readings from the monitor. |
| Jul 2023 | 3 of 31 days measured; a month needs 22. The others: 26 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours), 1 missing from OpenAQ's archive. |
| Mar 2023 | 6 of 31 days measured; a month needs 22. The others: 1 with no readings from the monitor, 3 with readings for part of the day (a day needs 18 hours), 1 missing from OpenAQ's archive. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Klötze's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| February 2025 | 6717.7 µg/m³ | 708thof 2,633 | Europe, 14 February to 1 March 2025 Europe, 1 to 14 February 2025 |
| January 2026 | 6516.6 µg/m³ | 652ndof 2,617 | Europe, January and February 2026 |
| February 2026 | 6114.6 µg/m³ | 803rdof 2,866 | Europe, January and February 2026 |
| November 2024 | 5310.1 µg/m³ | 825thof 2,624 | Europe, November 2024 |
| March 2026 | 498.8 µg/m³ | 1,927thof 2,971 | – |
| April 2023 | 488.7 µg/m³ | 671stof 1,622 | – |
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.
Klötze's worst days
| Day | US AQI | Episode |
|---|---|---|
| 23 Jan 2026 | 15460.4 µg/m³ | Europe, January and February 2026 |
| 13 Feb 2025 | 14754.3 µg/m³ | Europe, 1 to 14 February 2025 |
| 10 Mar 2025 | 14252.3 µg/m³ | Germany, Poland and 25 more countries, March 2025 |
| 24 Jan 2026 | 14151.7 µg/m³ | Europe, January and February 2026 |
| 25 Jan 2026 | 13248.0 µg/m³ | Europe, January and February 2026 |
| 11 Mar 2025 | 13147.7 µg/m³ | Germany, Poland and 25 more countries, March 2025 |
| 9 Nov 2024 | 12846.5 µg/m³ | Europe, November 2024 |
| 10 Feb 2025 | 11942.9 µg/m³ | Europe, 1 to 14 February 2025 |
| 6 Feb 2026 | 11741.9 µg/m³ | Europe, January and February 2026 |
| 31 Mar 2024 | 10838.5 µg/m³ | Europe, March and April 2024 |
Daily means, the highest since 21 Mar 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, Klötze, Germany, 21 Mar 2023 – 10 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/de/kloetze/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.
Klötze now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 23:07 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).