Air quality in Weimar, Thuringia, Germany today

Mr. Duck’s Air Quality Score

Good air today for Weimar, Thuringia, Germany

⚠️ This website is currently under active development. Some data may be incomplete or temporarily inaccurate. For health-critical decisions, please verify information through official government or environmental sources.

Categories follow US EPA AQI breakpoints for PM (estimate from latest valid measurements; this project does not compute EPA NowCast/24-hour AQI yet).

This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.

Air quality today

The air quality in Weimar today is classified as Good. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 reference value of 8.57 µg/m³ and a PM10 reference value of 13.96 µg/m³, based on seven valid observations.

Data are shown via OpenAQ and reflect the current assessment for the city. This page is informational; for health guidance, use official sources such as EPA AirNow or WHO.

Latest sensor values

PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).

What the data includes

The dataset for Weimar contains measurements for five pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter 10 µm or less (PM10) and particulate matter 2.5 µm or less (PM2.5). In total 14 data rows are recorded across three monitoring stations, so each pollutant is represented by a handful of observations rather than a dense network.

The most recent values are fairly fresh for four of the pollutants, with the latest timestamps on 2026‑02‑10 18:00 UTC for NO₂, PM10, PM2.5 and O₃. The NO data point is older, last updated on 2024‑03‑11 11:00 UTC, which means that the nitrogen monoxide record is more than a year out of date compared with the others. Across the city the median concentrations are: NO ≈ 10.52 µg/m³ (range 5.10–91.61), NO₂ ≈ 37.17 µg/m³ (22.51–43.49), PM10 ≈ 13.96 µg/m³ (10.65–32.24), PM2.5 ≈ 8.57 µg/m³ (7.99–22.13) and O₃ ≈ 46.30 µg/m³ (1.99–46.30). The spread is especially large for NO, where the maximum exceeds the median by nearly ninefold, while PM2.5 shows a tighter distribution with its 90th percentile at about 19.4 µg/m³.

Because only three stations contribute data, spatial coverage is limited; conditions can differ between locations such as Schwanseestrasse (providing NO and O₃ values) and Steubenstrasse (supplying the other four pollutants). The dataset also includes seven rows classified as “old” and none marked unknown, indicating that a portion of the historical record may not reflect current air quality. Users should keep in mind that these figures represent snapshots from specific sites and times rather than a comprehensive city‑wide picture.

Learn more about sources and filtering: About the data.

Trusted references: WHO (Air pollution) · US EPA AirNow · European Environment Agency (Air)

Latest sensor values (bars)

PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).

Data notes

The data shown for Weimar are based on seven valid measurements and were updated within 3 days, with the latest refresh recorded at 2026‑02‑10T18:00:00+00:00. This snapshot reflects conditions at specific monitoring points and times; air quality can differ across neighbourhoods and throughout the day, so values may not represent every location or moment in the city.

OpenAQ station rows