Sunnyvale air quality now

United States · 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 Sunnyvale right now. From 01:00 to 12:00 local time the city mean PM2.5 rose from 4.5 to 10.0 µg/m³. The highest hour was 10:00 with 21.5 µg/m³.

The wind is weak (1 m/s): particles are likely accumulating near the ground.

Weather now: partly cloudy, 18°C, wind 1 m/s, humidity 75%. No major change in the wind is expected in the coming hours. By 01:00 the temperature will be about 12°C.

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

1 m/s

Wind, N

0 mm

Precipitation today

Pollution accumulation index now

9/100Low · An estimate of weather conditions · not a PM2.5 forecast

Now95
14.0022.0005.0013.00

Pollution accumulation forecast

Today — November 11

19°/10°

Index by time of day

54/100Moderate

  1. 54/100Night
  2. 41/100Morning
  3. 10/100Day
  4. 27/100Evening

Thursday — November 12

22°/11°

Index by time of day

53/100Moderate

  1. 53/100Night
  2. 44/100Morning
  3. 7/100Day
  4. 26/100Evening

Friday — November 13

18°/10°

Index by time of day

59/100Moderate

  1. 59/100Night
  2. 45/100Morning
  3. 8/100Day
  4. 24/100Evening

Saturday — November 14

18°/12°

Index by time of day

50/100Moderate

  1. 50/100Night
  2. 37/100Morning
  3. 8/100Day
  4. 21/100Evening

Sunday — November 15

20°/13°

Index by time of day

49/100Moderate

  1. 49/100Night
  2. 37/100Morning
  3. 7/100Day
  4. 19/100Evening

Monday — November 16

16°/12°

Index by time of day

40/100Moderate

  1. 40/100Night
  2. 35/100Morning
  3. 8/100Day
  4. 19/100Evening

Forecast of conditions that trap pollution near the surface

Weather

18°

Partly cloudy. Feels like 19°C

  1. MorningFog13°C100%
  2. DayClear18°C75%
  3. EveningClear13°C72%

Wind

1m/sWind from the N

2m/sWind gusts

Wind force: 1

Light wind is expected over the next few hours.

10-day weather forecast for Sunnyvale

United States

  1. TodayNov 11Fog19°C10°C
  2. ThuNov 12Cloudy22°C11°C
  3. FriNov 13Rain18°C10°C
  4. SatNov 14Cloudy18°C12°C
  5. SunNov 15Cloudy20°C13°C
  6. MonNov 16Rain16°C12°C
  7. TueNov 17Cloudy17°C13°C
  8. WedNov 18Cloudy18°C11°C
  9. ThuNov 19Rain15°C12°C
  10. FriNov 20Cloudy16°C10°C

United States: sensors in total

35

  1. PortlandUnited States

    4

  2. BellevueUnited States

    3

  3. FrederickUnited States

    2

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: Sunnyvale

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

Click a day to see its date and value.

LowModerateElevatedHighVery highExtremely high

United States · City ranking · All pilot cities

Questions

What is the air quality in Sunnyvale right now?

Fresh data for Sunnyvale are insufficient (last update: 15:45 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