Air quality in Riyadh today
The air in Riyadh (Saudi Arabia) now and over the next 48 hours: the US AQI and the European AQI, fine particles (PM2.5, PM10), ozone and nitrogen dioxide, compared with the WHO 2021 guidelines, with what it means for outdoor sport, children, older people and open windows.
These numbers are more than 7 hours old, so they are hidden. Open the live map for the current air. Open the air map centred on Riyadh
AQI right now
Hazardous. Main pollutant: PM10, 30× the WHO guideline.
What to do today
- Outdoor sport No exercise outdoors.
- Children, older people, asthma Everyone should stay indoors; FFP2/N95 mask outside, follow local health warnings.
- Windows Keep closed and seal gaps; HEPA purifier on.
AQI in Riyadh hour by hour, next 48 hours
- Good
- Moderate
- Unhealthy for sensitive groups
- Unhealthy
- Very unhealthy
- Hazardous
Cleanest hour in the next 24 h: Sun 00:00 (AQI 500+). Worst hour: Sun 23:00 (AQI 500+).
US AQI per hour, local time. Bars coloured by category.
Compared with the WHO 2021 guidelines
| Pollutant | Next 24 h | WHO guideline | Ratio |
|---|---|---|---|
| PM2.5 | 164 µg/m³ | 15 µg/m³ | 10.9× |
| PM10 | 1,348 µg/m³ | 45 µg/m³ | 30× |
| Nitrogen dioxide (NO₂) | 38 µg/m³ | 25 µg/m³ | 1.5× |
| Ozone (O₃) | 91 µg/m³ | 100 µg/m³ | within |
PM2.5, PM10 and NO₂: 24-hour mean of the forecast against the 24-hour guideline; ozone: highest 8-hour mean against the 8-hour guideline.
Forecast for Sun 00:00 local time · updated 2026-10-24 21:41 UTC
Air quality map around Riyadh
Live PM2.5 field (NOAA GEFS-Aerosols): a different model, so it can disagree with the numbers above by a few units.
More about Riyadh
Bad air alert for Riyadh
Air quality alerts are part of LayEarth Pro: one push the evening before the forecast US AQI in your city goes above your level, so you can move a run, a school trip or an open window in time. 7-day free trial, then 9 USD a month.
Questions
- What is the AQI in Riyadh right now?
- US AQI 500+ (Hazardous), European AQI 166; PM2.5 90 µg/m³ (Sun 00:00).
- Is it safe to exercise outdoors in Riyadh today?
- No exercise outdoors.
- What is the main pollutant in Riyadh?
- PM10, 30× the WHO guideline.
- Where do the numbers come from?
- The CAMS global air-quality forecast of the Copernicus Atmosphere Monitoring Service, read through Open-Meteo: a model on a ~40 km grid, not a monitoring station. Where a nearby monitor disagrees, the monitor is right.
Nearby cities
How it is computed
Hourly CAMS forecast (Copernicus) for the coordinates of Riyadh via Open-Meteo; US AQI per the US EPA breakpoints, European AQI per the EEA bands, WHO 2021 air-quality guidelines. The page is rebuilt every 3 hours. Live map.