Hem air quality now

France · The summary is refreshed every 15 minutes.

Now

No current value: fewer than four sensors at different places are reporting now.

Open map

Open methodology and data in JSON: Methodology and data sources · JSON

There are not enough fresh measurements for Hem right now. From 10:00 to 18:00 local time the city mean PM2.5 rose from 16.5 to 21.0 µg/m³. The highest hour was 17:00 with 32.5 µg/m³.

High humidity (96%) possibly makes optical sensors read somewhat higher.

Weather now: cloudy, 6°C, wind 3 m/s, humidity 96%. No major change in the wind is expected in the coming hours.

Written automatically at 22:13 local time (21:13 UTC) from sensor measurements and the weather forecast. Values are approximate; hypotheses are marked.

3 m/s

Wind, NNE

2.4 mm

Precipitation today

Pollution accumulation index now

23/100Low · An estimate of weather conditions · not a PM2.5 forecast

Now2322
23.0007.0014.0022.00

Pollution accumulation forecast

Today — November 11

7°/6°

Index by time of day

47/100Moderate

  1. 47/100Night
  2. 37/100Morning
  3. 10/100Day
  4. 23/100Evening

Thursday — November 12

10°/5°

Index by time of day

48/100Moderate

  1. 48/100Night
  2. 38/100Morning
  3. 8/100Day
  4. 26/100Evening

Friday — November 13

9°/1°

Index by time of day

52/100Moderate

  1. 52/100Night
  2. 39/100Morning
  3. 9/100Day
  4. 28/100Evening

Saturday — November 14

7°/-1°

Index by time of day

55/100Moderate

  1. 55/100Night
  2. 41/100Morning
  3. 9/100Day
  4. 16/100Evening

Sunday — November 15

12°/3°

Index by time of day

42/100Moderate

  1. 42/100Night
  2. 21/100Morning
  3. 5/100Day
  4. 11/100Evening

Monday — November 16

11°/6°

Index by time of day

24/100Low

  1. 24/100Night
  2. 23/100Morning
  3. 6/100Day
  4. 22/100Evening

Forecast of conditions that trap pollution near the surface

Weather

6°

Cloudy. Feels like 3°C

  1. MorningRain6°C100%
  2. DayRain6°C97%
  3. EveningRain6°C96%

Wind

3m/sWind from the NNE

6m/sWind gusts

Wind force: 2

Gusts up to 6 m/s are expected.

10-day weather forecast for Hem

France

  1. TodayNov 11Rain7°C6°C
  2. ThuNov 12Rain10°C5°C
  3. FriNov 13Rain9°C1°C
  4. SatNov 14Fog7°C-1°C
  5. SunNov 15Rain12°C3°C
  6. MonNov 16Rain11°C6°C
  7. TueNov 17Rain8°C3°C
  8. WedNov 18Rain11°C8°C
  9. ThuNov 19Rain11°C7°C
  10. FriNov 20Rain8°C4°C

France: sensors in total

207

  1. RennesFrance

    20

  2. ToulouseFrance

    18

  3. VilleurbanneFrance

    16

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.

France · City ranking · All pilot cities

Questions

What is the air quality in Hem right now?

Fresh data for Hem are insufficient (last update: 18:45 local time, 17:45 UTC). Open the map for the latest readings of individual sensors.

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