Fuchu, Hiroshima Air Quality Forecast - Today, Tomorrow
Air Quality Today
Today (15 October): Air quality in Fuchu, Hiroshima is fair. AQI and PM2.5 are fair; PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 10:00 PM (PM2.5: 36.6/100).
Air Quality Tomorrow
Tomorrow (16 October 2026): Air quality in Fuchu, Hiroshima is fair. PM10 increases to fair; all other pollutants stay as today. Pollution peaks around 12:00 AM (PM2.5: 33.8/100).
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Air Quality
Today - 15 October
| Pollutant | Level | Value |
|---|---|---|
| AQI | Fair | 21.0/100 |
| PM2.5 (fine particles) | Fair | 20.5/100 |
| PM10 (coarse particles) | Good | 15.5/100 |
| NO2 (nitrogen dioxide) | Good | 11.2/100 |
| O3 (ozone) | Good | 10.8/100 |
| SO2 (sulfur dioxide) | Good | 2.5/100 |
| CO (carbon monoxide) | Good | 0.9/100 |
| HCHO (formaldehyde) | Good | 3.1/100 |
| PM1 (ultrafine particles) | Good | 11.9/100 |
Tomorrow - 16 October
| Pollutant | Level | Value |
|---|---|---|
| AQI | Fair | 26.8/100 |
| PM2.5 (fine particles) | Fair | 26.7/100 |
| PM10 (coarse particles) | Fair | 21.4/100 |
| NO2 (nitrogen dioxide) | Good | 12.6/100 |
| O3 (ozone) | Good | 12.1/100 |
| SO2 (sulfur dioxide) | Good | 4.0/100 |
| CO (carbon monoxide) | Good | 1.1/100 |
| HCHO (formaldehyde) | Good | 4.5/100 |
| PM1 (ultrafine particles) | Good | 16.3/100 |
Local Environmental Conditions
Around the center of Fuchu, Hiroshima, dense development means road traffic is the main local source of nitrogen dioxide and fine particles. Lying in a valley, the area is prone to temperature inversions that hold pollutants near the ground when winds drop. Sea breezes along the coast usually help ventilate the area. Local sources include manufacturing.
The valley is most prone to stagnant air from December to March, when temperatures near 3°C and light winds trap emissions from home heating and traffic. By contrast, summer sun from June to September cooks traffic fumes into ozone, especially in the warmest month, which averages 26°C. On the plus side, breezy weather in February, with winds near 15 km/h, tends to sweep pollution away.
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Frequently Asked Questions About Air Quality in Hiroshima
Is air quality bad in Fuchu, Hiroshima right now?
On 15 October 2026, overall air quality in Fuchu, Hiroshima is fair. AQI is the main air quality indicator at 21.0/100. Pollution peaks around 10:00 PM (PM2.5: 36.6/100).
Will air quality be worse tomorrow in Fuchu, Hiroshima?
On 16 October 2026, air quality conditions in Fuchu, Hiroshima will be similar to today, with AQI forecast at fair at 26.8/100. Pollution peaks around 12:00 AM (PM2.5: 33.8/100).
When is air pollution at its worst in Fuchu, Hiroshima?
The valley is most prone to stagnant air from December to March, when temperatures near 3°C and light winds trap emissions from home heating and traffic. By contrast, summer sun from June to September cooks traffic fumes into ozone, especially in the warmest month, which averages 26°C. On the plus side, breezy weather in February, with winds near 15 km/h, tends to sweep pollution away.
Are air quality levels in Fuchu, Hiroshima based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
Understanding the Scale
The 0–100 air quality scores represent risk levels, not direct air pollutant concentrations. Higher scores indicate higher risk.
Air Quality
| Good | 0-20 | Low air quality risk. Air quality is expected to be good, with low levels of pollution. |
| Fair | 20-40 | Generally low air quality risk. Air quality is expected to be acceptable, with some pollution present. |
| Moderate | 40-60 | Moderate air quality risk. Air pollution is elevated and air quality may be less favorable. |
| Poor | 60-80 | High air quality risk. Air pollution is high and air quality is expected to be poor. |
| Very Poor | 80-100 | Very high air quality risk. Air pollution is very high and air quality is expected to be very poor. |