Hillegom air quality now

Netherlands · 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

In Hillegom the air is moderate right now (approximate, US EPA scale). From 10:00 to 21:00 local time the city mean PM2.5 stayed roughly level: from 32.7 to 35.3 µg/m³.

Light wind (1 m/s) in the evening or at night, as the air cools, possibly traps particles near the ground (a temperature inversion). Cold weather (2°C) possibly means more heating, a common source of particles.

Weather now: partly cloudy, 2°C, wind 1 m/s, humidity 89%. Precipitation is expected around 07:00; it may wash particles out. By 10:00 the temperature will be about 8°C.

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

1 m/s

Wind, NNE

0 mm

Precipitation today

Pollution accumulation index now

29/100Low · An estimate of weather conditions · not a PM2.5 forecast

Now2912
23.0007.0014.0022.00

Pollution accumulation forecast

Today — November 11

7°/2°

Index by time of day

35/100Moderate

  1. 35/100Night
  2. 27/100Morning
  3. 8/100Day
  4. 29/100Evening

Thursday — November 12

10°/1°

Index by time of day

61/100Moderate

  1. 61/100Night
  2. 38/100Morning
  3. 6/100Day
  4. 14/100Evening

Friday — November 13

10°/8°

Index by time of day

35/100Moderate

  1. 35/100Night
  2. 21/100Morning
  3. 7/100Day
  4. 21/100Evening

Saturday — November 14

8°/4°

Index by time of day

36/100Moderate

  1. 36/100Night
  2. 29/100Morning
  3. 8/100Day
  4. 21/100Evening

Sunday — November 15

11°/4°

Index by time of day

36/100Moderate

  1. 36/100Night
  2. 25/100Morning
  3. 5/100Day
  4. 10/100Evening

Monday — November 16

11°/9°

Index by time of day

22/100Low

  1. 19/100Night
  2. 22/100Morning
  3. 7/100Day
  4. 16/100Evening

Forecast of conditions that trap pollution near the surface

Weather

2°

Partly cloudy. Feels like -1°C

  1. MorningCloudy5°C84%
  2. DayCloudy6°C81%
  3. EveningPartly cloudy2°C88%

Wind

1m/sWind from the NNE

1m/sWind gusts

Wind force: 1

Light wind is expected over the next few hours.

10-day weather forecast for Hillegom

Netherlands

  1. TodayNov 11Cloudy7°C2°C
  2. ThuNov 12Rain10°C1°C
  3. FriNov 13Rain10°C8°C
  4. SatNov 14Rain8°C4°C
  5. SunNov 15Rain11°C4°C
  6. MonNov 16Rain11°C9°C
  7. TueNov 17Rain10°C6°C
  8. WedNov 18Rain12°C9°C
  9. ThuNov 19Rain10°C8°C
  10. FriNov 20Rain10°C8°C

Netherlands: sensors in total

688

  1. AmersfoortNetherlands

    88

  2. EindhovenNetherlands

    86

  3. GroningenNetherlands

    78

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: Hillegom

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

Click a day to see its date and value.

LowModerateElevatedHighVery highExtremely high

Netherlands · City ranking · All pilot cities

Questions

What is the air quality in Hillegom right now?

Fresh data for Hillegom are insufficient (last update: 00:45 local time, 23:45 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