Yokohama: Air Pollution Today — AQI Index, PM2.5/PM10, Smog Alerts and Forecast

Latest air quality data: Yokohama

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Pollution and air quality forecast for Yokohama. Today is Thursday, August 27, 2026. The following air pollution values have been recorded for Yokohama:

particulate matter (PM2.5) dust - 30 (Moderate)
particulate matter (PM10) suspended dust - 36 (Moderate)
ozone (O3) - 38 (Good)
nitrogen dioxide (NO2) - 34 (Good)
sulfur dioxide (SO2) - 35 (Good)
carbon monoxide (CO) - 192 (Good)

Real-time Air Quality Index (AQI) for Yokohama, Thursday, August 27, 2026: 2.

AQI 2 Moderate

What is the air quality in Yokohama today? Is the air polluted in Yokohama?. Is there smog?

Today (Thursday, August 27, 2026) air quality is moderate in Yokohama. Some pollutants in Yokohama may slightly affect very few hypersensitive individuals. Air pollutants in Yokohama may cause minor breathing discomfort to sensitive people.

What is the current level of PM2.5 in Yokohama? (particulate matter (PM2.5) dust)
Today's PM2.5 level is: 30 (Moderate) For comparison, the highest level of PM2.5 in Yokohama in the last 7 days was: 40 (Saturday, August 22, 2026) and the lowest: 18 (Tuesday, August 25, 2026).

What is the level of PM10 today in Yokohama? (particulate matter (PM10) suspended dust)
The current level of particulate matter PM10 in Yokohama is: 36 (Moderate)

How is the O3 level today in Yokohama? (ozone (O3))
38 (Good)

How high is the level of NO2? (nitrogen dioxide (NO2))
34 (Good)

What is the level of SO2 pollution? (sulfur dioxide (SO2))
35 (Good)

How high is the CO level? (carbon monoxide (CO))
192 (Good)

Current data Thursday, August 27, 2026 at 10:00 AM

PM2,5 30 (Moderate)

PM10 36 (Moderate)

O3 38 (Good)

NO2 34 (Good)

SO2 35 (Good)

CO 192 (Good)

Data on air pollution from recent days in Yokohama

index	2026-08-27	2026-08-26	2026-08-25	2026-08-24	2026-08-23	2026-08-22	2026-08-21	2026-08-20
pm25	31 Moderate	20 Moderate	18 Moderate	28 Moderate	28 Moderate	40 Unhealthy for Sensitive Groups	25 Moderate	22 Moderate
pm10	34 Moderate	22 Moderate	20 Moderate	29 Moderate	28 Moderate	41 Moderate	27 Moderate	26 Moderate
o3	31 Good	49 Good	54 Good	82 Moderate	65 Good	40 Good	34 Good	30 Good
no2	51 Moderate	33 Good	31 Good	52 Moderate	52 Moderate	58 Moderate	35 Good	38 Good
so2	38 Good	25 Good	20 Good	35 Good	31 Good	38 Good	28 Good	27 Good
co	267 Good	239 Good	202 Good	294 Good	240 Good	350 Good	194 Good	206 Good

data source »

Quality of life in Yokohama

Green and Parks in the City

Yokohama 88%

South Korea: 61% Taiwan: 53% Northern Mariana Islands: 83% Guam: 29%

particulate matter PM2.5

Yokohama 15 (Moderate)

Pleasure of spending time in the city

Yokohama 81%

South Korea: 43% North Korea: 44% Taiwan: 47% Northern Mariana Islands: 81% Guam: 62%

particulate matter PM10

Yokohama 29 (Moderate)

Air Pollution

Yokohama 26%

South Korea: 69% North Korea: 44% Taiwan: 61% Northern Mariana Islands: 11% Guam: 33%

Garbage Disposal

Yokohama 88%

South Korea: 62% North Korea: 47% Taiwan: 65% Northern Mariana Islands: 42% Guam: 35%

Availability and quality of drinking water

Yokohama 84%

South Korea: 72% North Korea: 47% Taiwan: 54% Northern Mariana Islands: 56% Guam: 52%

Cleanliness and tidiness

Yokohama 88%

South Korea: 63% North Korea: 58% Taiwan: 56% Northern Mariana Islands: 56% Guam: 37%

Noise and Light pollution

Yokohama 36%

North Korea: 33% Taiwan: 59% Northern Mariana Islands: 42% Guam: 54%

Water Pollution

Yokohama 36%

South Korea: 38% North Korea: 56% Taiwan: 58% Northern Mariana Islands: 58% Guam: 46%

Source: Numbeo

Yokohama

Thursday, August 27, 2026 at 10:00 AM

PM2,5 30 (Moderate)

particulate matter (PM2.5) dust

PM10 36 (Moderate)

particulate matter (PM10) suspended dust

O3 38 (Good)

ozone (O3)

NO2 34 (Good)

nitrogen dioxide (NO2)

SO2 35 (Good)

sulfur dioxide (SO2)

CO 192 (Good)

carbon monoxide (CO)

Yokohama

index	2026-08-20	2026-08-21	2026-08-22	2026-08-23	2026-08-24	2026-08-25	2026-08-26	2026-08-27
pm25	22	25	40	28	28	18	20	31
pm10	26	27	41	28	29	20	22	34
o3	30	34	40	65	82	54	49	31
no2	38	35	58	52	52	31	33	51
so2	27	28	38	31	35	20	25	38
co	206	194	350	240	294	202	239	267

* Pollution data source: https://openaq.org () The data is licensed under CC-By 4.0

🌦️ Weather · 16-day Forecast — Japan

16-day weather forecast for Japan: today around 32°C (rain), lows near 21°C. Daily temperature and conditions, updated every day. Wind is light today (about 6 km/h) — pollutants can build up near the ground.

☀️ UV Index · 16-day Forecast — Japan

The UV index in Japan today is 7.1 (high) — unprotected fair skin can burn in about 30 minutes.

📍 Air quality in nearby cities

Live PM2.5 around Yokohama — compare nearby locations.

Tokyo 30 µg/m³
Osaka City 8 µg/m³
Nagoya 17 µg/m³
Sapporo 6 µg/m³
Kōbe Shi 7 µg/m³
Kyoto 6 µg/m³
Fukuoka City 6 µg/m³
Saitama-shi 37 µg/m³

Frequently asked questions

Is the air safe to breathe in Yokohama today?

The current average PM2.5 across Yokohama is about 30 µg/m³, rated “Moderate”. Air quality is acceptable, but unusually sensitive people should limit prolonged outdoor exertion.

What is the current PM2.5 level in Yokohama?

Right now PM2.5 in Yokohama averages about 30 µg/m³ (“Moderate”). PM2.5 are fine particles small enough to reach the lungs and bloodstream.

Which day last week had the worst air in Yokohama?

Over the past week, the highest daily PM2.5 in Yokohama was recorded on Saturday, August 22 (about 40 µg/m³).

What is the UV index in Yokohama today?

The UV index in Yokohama today is 7.1 (high) — unprotected fair skin can burn in about 30 minutes.

Does today's wind help disperse smog in Yokohama?

Wind is light today (about 6 km/h) — pollutants can build up near the ground.

How is air quality measured?

Air quality here is based on PM2.5 — the concentration of fine particulate matter in µg/m³. Lower values mean cleaner air. Data is updated daily from Open-Meteo.