Celestynów air quality now

Poland · The summary is refreshed every 15 minutes.

November 11

The air is unhealthy for sensitive groups

Measured 21:00–22:57

Celestynów

0°C

Cloudy

133AQI

1008

hPa

Atmospheric
pressure

99%

Humidity

Celestynów, November 10, 2026: daily mean PM2.5 44 µg/m³ (4 sensors), level “Elevated” — as in the Atmy Data Hub. Now (23:00 local time): 48.4 µg/m³. Open methodology and data in JSON: Methodology and data sources · JSON

Right now in Celestynów, PM2.5 averages 48.4 µg/m³ — “unhealthy for sensitive groups” on the US EPA scale (approximate, from hourly readings). Mean of 4 sensors from Sensor.Community, AirGradient, Government stations, readings from 21:00–22:57 local time (20:00–21:57 UTC), summary prepared at 23:00 local time. Median: 38.6 µg/m³; range across sensors: 15.3–101.0 µg/m³.

In Celestynów the air is unhealthy for sensitive groups 🟠 AQI 133. Higher than three hours ago. ☁️ 0 °C · No precipitation · Wind 2 m/s

In Celestynów the air is unhealthy for sensitive groups right now (approximate, US EPA scale). From 10:00 to 23:00 local time the city mean PM2.5 rose from 21.5 to 48.4 µg/m³.

Light wind (2 m/s) in the evening or at night, as the air cools, possibly traps particles near the ground (a temperature inversion). Cold weather (0°C) possibly means more heating, a common source of particles.

Weather now: cloudy, 0°C, wind 2 m/s, humidity 99%. No major change in the wind is expected in the coming hours.

Written automatically at 23:00 local time (22:00 UTC) from sensor measurements and the weather forecast. Values are approximate; hypotheses are marked.

2 m/s

Wind, ESE

0 mm

Precipitation today

Celestynów: air quality for the completed day

Metric: PM2.5, µg/m³ · Color scale: EPA AQI · November 10, 2026 · 00:00–24:00 UTC = 01:00–01:00 UTC+1

44 µg/m³ Elevated

Daily mean PM2.5 on November 10, 2026 (00:00–24:00 UTC = 01:00–01:00 UTC+1): 44 µg/m³ from 4 sensors that passed the quality check — the same value as in the Atmy Data Hub.

LowModerateElevatedHighVery highExtremely high

Pollution accumulation index now

24/100Low · An estimate of weather conditions · not a PM2.5 forecast

Now2416
23.0007.0014.0022.00

Pollution accumulation forecast

Today — November 11

3°/0°

Index by time of day

40/100Moderate

  1. 40/100Night
  2. 33/100Morning
  3. 9/100Day
  4. 24/100Evening

Thursday — November 12

5°/0°

Index by time of day

53/100Moderate

  1. 53/100Night
  2. 33/100Morning
  3. 8/100Day
  4. 17/100Evening

Friday — November 13

5°/2°

Index by time of day

46/100Moderate

  1. 46/100Night
  2. 38/100Morning
  3. 7/100Day
  4. 23/100Evening

Saturday — November 14

6°/0°

Index by time of day

30/100Low

  1. 30/100Night
  2. 25/100Morning
  3. 8/100Day
  4. 26/100Evening

Sunday — November 15

6°/-1°

Index by time of day

54/100Moderate

  1. 54/100Night
  2. 39/100Morning
  3. 7/100Day
  4. 19/100Evening

Monday — November 16

10°/1°

Index by time of day

46/100Moderate

  1. 46/100Night
  2. 31/100Morning
  3. 4/100Day
  4. 11/100Evening

Forecast of conditions that trap pollution near the surface

Weather

0°

Cloudy. Feels like -3°C

  1. MorningCloudy1°C100%
  2. DayCloudy3°C92%
  3. EveningCloudy0°C99%

Wind

2m/sWind from the ESE

3m/sWind gusts

Wind force: 2

Gusts up to 5 m/s are expected.

10-day weather forecast for Celestynów

Poland

  1. TodayNov 11Snow3°C0°C
  2. ThuNov 12Rain5°C0°C
  3. FriNov 13Rain5°C2°C
  4. SatNov 14Cloudy6°C0°C
  5. SunNov 15Clear6°C-1°C
  6. MonNov 16Rain10°C1°C
  7. TueNov 17Rain8°C2°C
  8. WedNov 18Rain8°C1°C
  9. ThuNov 19Rain10°C4°C
  10. FriNov 20Rain9°C3°C

Where in Celestynów is the air worse?

See all sensors

Highest current reading: 101.0 µg/m³ (Otwock, ul. Brzozowa (Mazowiecka Sieć Monitoringu Powietrza)). Lowest: 15.3 µg/m³ (SC #56581). The list shows every sensor, highest first.

  1. Otwock, ul. Brzozowa (Mazowiecka Sieć Monitoringu Powietrza) →101 µg/m³
  2. Celestynów →59 µg/m³
  3. SC #101176 →19 µg/m³
  4. SC #56581 →15 µg/m³

Source: atmy.ai monitoring network

Who provides the data

Sensors in the summary by network: Sensor.Community — 2 sensors, AirGradient — 1 sensor, Government stations — 1 sensor.

Atmy shows the networks’ readings after the Data Hub’s quality check: test devices and sensors that fail it are left out.

Poland: sensors in total

701

  1. WarsawPoland

    113

  2. WrocławPoland

    80

  3. PoznanPoland

    54

Cities with the most sensors

All sensors on the map, by city as the map assigns them; the city’s values count only the sensors that pass the Data Hub’s quality check.

Air quality calendar: Celestynów

Daily mean PM2.5 of the city sensors, µg/m³

Click a day to see its date and value.

LowModerateElevatedHighVery highExtremely high

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Air quality in Celestynów now — Atmy

Poland · City ranking · All pilot cities

Questions

What was the air quality in Celestynów over the last completed day?

Daily mean PM2.5 on November 10, 2026 (00:00–24:00 UTC = 01:00–01:00 UTC+1): 44 µg/m³ from 4 sensors that passed the quality check — the same value as in the Atmy Data Hub.

What is the air quality in Celestynów right now?

Right now in Celestynów, PM2.5 averages 48.4 µg/m³ — “unhealthy for sensitive groups” on the US EPA scale (approximate, from hourly readings). Mean of 4 sensors from Sensor.Community, AirGradient, Government stations, readings from 21:00–22:57 local time (20:00–21:57 UTC), summary prepared at 23:00 local time. Median: 38.6 µg/m³; range across sensors: 15.3–101.0 µg/m³.

Is it safe to be outdoors in Celestynów now?

The current level is “unhealthy for sensitive groups” (US EPA scale, approximate). Children, older adults and people with heart or lung disease should reduce prolonged or heavy exertion outdoors. This is the standard guidance of the scale, not medical advice.

Where in Celestynów is the air worse?

Highest current reading: 101.0 µg/m³ (Otwock, ul. Brzozowa (Mazowiecka Sieć Monitoringu Powietrza)). Lowest: 15.3 µg/m³ (SC #56581). The list shows every sensor, highest first.

Where do these data come from?

From Atmy sensors and connected public networks (citizen, experimental and government monitors), aggregated by Atmy. Values are approximate; see the methodology.

How often is this page updated?

The summary is rebuilt every 15 minutes from the latest reading of each sensor, each no older than one hour.

Data

Where do these data come from?

The daily value is the Data Hub’s: the mean of the city’s sensors that passed the nightly quality check, each with at least 12 valid hours, and only with sensors at four places 500 m apart; days are UTC.

“Now” uses the same sensors and rule: the mean of their latest readings, each at most 60 minutes old, shown only with sensors at four places 500 m apart reporting.

Source: public Atmy monitoring data. Methodology and data sources · Data terms