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Tokyo air quality

Japan · Live AQI and hourly forecast for the next 5 days · updated Sun 08:00 local time

61

Moderate

US AQI, mostly PM2.5

Acceptable. Unusually sensitive people should ease off long, intense outdoor effort.

Next 24 hours
61–125US AQI, highest around Mon 07:00
Best time outside
Sun 08:00–11:00US AQI about 61
PM2.5 vs WHO guideline
3.1×47 µg/m³ over 24 h, guideline 15
Cigarette equivalent
≈ 2.1 a dayBerkeley Earth rule of thumb
European AQI
Moderatelevel 3 of 6

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The live globe, centred on Tokyo. Switch pollutants, drag through the next 5 days or press play. Full map →

Pollutants in Tokyo right now

PollutantNowNext 24 h vs WHOUS AQI band
Fine particles (PM2.5) 22 µg/m³ 3.1× Moderate
Coarse particles (PM10) 23 µg/m³ 1.1× Good
Nitrogen dioxide (NO2) 34 µg/m³ 2.7× Good
Ozone (O3) 49 µg/m³ 0.7× Good
Sulphur dioxide (SO2) 27 µg/m³ 1.2× Good
Carbon monoxide (CO) 247 µg/m³ 0.1× Good
Desert dust0 µg/m³
Smoke and haze (aerosol optical depth)0.15
UV index1.6

“Next 24 h vs WHO” compares the forecast with the World Health Organization’s 2021 guideline levels: 24-hour means of 15 µg/m³ for PM2.5, 45 for PM10, 25 for NO2, 40 for SO2 and 4 mg/m³ for CO, and 100 µg/m³ over 8 hours for ozone. Above 1× is above the guideline.

Next 48 hours

Hourly US AQI. Highest 142 around Mon 15:00, lowest 61 around Sun 08:00.

Good 0–50Moderate 51–100Sensitive 101–150Unhealthy 151–200Very unhealthy 201–300Hazardous 301+

5-day air quality forecast for Tokyo

Daily range of the hourly US AQI, from lowest to highest, on a scale of 0 to 150.

DayUS AQIAt worstWorst hourPM2.5 avgUV max
Sun 27 Sept 61–89 Moderate 23:00 32 5.1
Mon 28 Sept 94–142 Sensitive 15:00 41 1.9
Tue 29 Sept 102–113 Sensitive 0:00 39 1.3
Wed 30 Sept 68–109 Sensitive 0:00 19 5.5
Thu 1 Oct 68–90 Moderate 22:00 31 4.7

Common questions about the air in Tokyo

  1. Is the air in Tokyo safe today?

    For most people, yes. Right now the US AQI in Tokyo is 61, which counts as moderate. Acceptable. Unusually sensitive people should ease off long, intense outdoor effort. It is expected to reach 125 (unhealthy for sensitive groups) around Mon 07:00.

  2. When is the best time to be outside in Tokyo?

    Sun 08:00–11:00. That is the cleanest stretch in the next 24 hours, with the US AQI averaging about 61. The worst hour is around Mon 07:00, at 125.

  3. What is the main pollutant in Tokyo?

    Fine particles (PM2.5). It drives the index right now, at 22 µg/m³. Tiny particles from combustion, fires and dust that reach deep into the lungs. The main driver of AQI worldwide.

  4. How does Tokyo's air compare with the WHO guideline?

    3.1 times the guideline. Over the next 24 hours PM2.5 averages about 47 µg/m³, against the World Health Organization's 24-hour guideline of 15 µg/m³. PM10, NO2 and SO2 are also forecast above their guideline levels.

  5. How many cigarettes is a day of Tokyo's air?

    About 2.1 cigarettes. Over the next 24 hours PM2.5 averages about 47 µg/m³. By Berkeley Earth's rule of thumb, 22 µg/m³ breathed for a day is roughly one cigarette.

  6. Will air quality in Tokyo improve this week?

    Today looks cleanest. Its AQI peaks at 89, against 142 on Monday, the worst day in the forecast.

Measured near Tokyo

StationDistancePM2.5 µg/m³Measured
Unnamed sensor Sensor.Community, low-cost sensor 7.2 km 7.6 Sun 08:45
Unnamed sensor Sensor.Community, low-cost sensor 9.7 km 7.2 Sun 08:49

Air quality near Tokyo

All 161 cities

About this forecast

Forecast from CAMS global via Open-Meteo: the Copernicus Atmosphere Monitoring Service (CAMS) model at about 40 km resolution (10 km inside Europe), refreshed twice a day. Models smooth out street-level peaks, so busy roads and industrial sites can be worse than shown; ground stations, where there are any nearby, show what monitors actually measure. The US AQI follows the US EPA scale and the European AQI the EEA bands. Readings for 35.68°N, 139.65°E, updated 2026-09-26 23:00 UTC.