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Osaka air quality

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

87

Moderate

US AQI, mostly PM2.5

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

Next 24 hours
74–88US AQI, highest around Sun 09:00
Best time outside
Mon 05:00–8:00US AQI about 75
PM2.5 vs WHO guideline
1.4×21 µg/m³ over 24 h, guideline 15
Cigarette equivalent
≈ 0.9 a dayBerkeley Earth rule of thumb
European AQI
Moderatelevel 3 of 6

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

Pollutants in Osaka right now

PollutantNowNext 24 h vs WHOUS AQI band
Fine particles (PM2.5) 29 µg/m³ 1.4× Moderate
Coarse particles (PM10) 29 µg/m³ 0.5× Good
Nitrogen dioxide (NO2) 43 µg/m³ 1.8× Good
Ozone (O3) 27 µg/m³ 0.4× Good
Sulphur dioxide (SO2) 32 µg/m³ 0.7× Good
Carbon monoxide (CO) 345 µg/m³ 0.1× Good
Desert dust0 µg/m³
Smoke and haze (aerosol optical depth)0.29
UV index0.7

“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 88 around Sun 09:00, lowest 59 around Mon 21:00.

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

5-day air quality forecast for Osaka

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 85–88 Moderate 7:00 27 2.5
Mon 28 Sept 59–84 Moderate 0:00 14 4.3
Tue 29 Sept 59–65 Moderate 14:00 14 0.8
Wed 30 Sept 59–62 Moderate 7:00 15 6.5
Thu 1 Oct 62–80 Moderate 22:00 25 6.2

Common questions about the air in Osaka

  1. Is the air in Osaka safe today?

    For most people, yes. Right now the US AQI in Osaka is 87, which counts as moderate. Acceptable. Unusually sensitive people should ease off long, intense outdoor effort.

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

    Mon 05:00–8:00. That is the cleanest stretch in the next 24 hours, with the US AQI averaging about 75. The worst hour is around Sun 09:00, at 88.

  3. What is the main pollutant in Osaka?

    Fine particles (PM2.5). It drives the index right now, at 29 µg/m³. Tiny particles from combustion, fires and dust that reach deep into the lungs. The main driver of AQI worldwide.

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

    1.4 times the guideline. Over the next 24 hours PM2.5 averages about 21 µg/m³, against the World Health Organization's 24-hour guideline of 15 µg/m³. NO2 is also forecast above its guideline level.

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

    About 0.9 cigarettes. Over the next 24 hours PM2.5 averages about 21 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 Osaka improve this week?

    Wednesday looks cleanest. Its AQI peaks at 62, against 88 on Sunday, the worst day in the forecast.

Air quality near Osaka

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 34.69°N, 135.50°E, updated 2026-09-26 23:00 UTC.