When is the best time to be outside in Taipei?

Sat 22:00–1:00. That is the cleanest stretch in the next 24 hours, with the US AQI averaging about 58. The worst hour is around Sat 07:00, at 109.

What is the main pollutant in Taipei?

Fine particles (PM2.5). It drives the index right now, at 17 µg/m³. Tiny particles from combustion, fires and dust that reach deep into the lungs. The main driver of AQI worldwide.

How does Taipei's air compare with the WHO guideline?

1.6 times the guideline. Over the next 24 hours PM2.5 averages about 23 µg/m³, against the World Health Organization's 24-hour guideline of 15 µg/m³. NO2 is also forecast above its guideline level.

How many cigarettes is a day of Taipei's air?

About 1.1 cigarettes. Over the next 24 hours PM2.5 averages about 23 µg/m³. By Berkeley Earth's rule of thumb, 22 µg/m³ breathed for a day is roughly one cigarette.

Will air quality in Taipei improve this week?

Sunday looks cleanest. Its AQI peaks at 70, against 114 on Tuesday, the worst day in the forecast.

Taipei air quality

Q: Is the air in Taipei safe today?

For most people, yes. Right now the US AQI in Taipei is 66, which counts as moderate. Acceptable. Unusually sensitive people should ease off long, intense outdoor effort. It is expected to reach 109 (unhealthy for sensitive groups) around Sat 07:00.

Taiwan · Live AQI and hourly forecast for the next 5 days · valid Sat 01:00 local time

Moderate

US AQI, mostly PM_2.5

Model estimate. Nearby measurements are shown separately.

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

Next 24 hours: 55–109US AQI, highest around Sat 07:00
Best time outside: Sat 22:00–1:00US AQI about 58
PM_2.5 vs WHO guideline: 1.6×23 µg/m³ over 24 h, guideline 15
Cigarette equivalent: ≈ 1.1 a dayBerkeley Earth rule of thumb

Loading the live globe…

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

Pollutants in Taipei right now

Pollutant	Now	Level	Next 24 h vs WHO
Fine particles PM_2.5	17 µg/m³	Moderate	1.6×
Coarse particles PM₁₀	20 µg/m³	Good	0.6×
Nitrogen dioxide NO₂	29 µg/m³	Good	1.9×
Ozone O₃	40 µg/m³	Good	0.4×
Sulphur dioxide SO₂	12 µg/m³	Good	0.8×
Carbon monoxide CO	1,064 µg/m³	Good	0.3×
Aerosol optical depth	0.16	Whole atmosphere · dimensionless
Desert dust	0 µg/m³	Modelled surface dust
UV index	0	Low

“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 PM_2.5, 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. Levels follow the US AQI, which is far less strict than the WHO, so air rated Good can still be above a guideline.

Next 48 hours

Hourly US AQI. Highest 109 around Sat 07:00, lowest 55 around Sat 22:00.

50100

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

5-day air quality forecast for Taipei

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

Day	US AQI	At worst	Worst hour	PM_2.5 avg	UV max
Sat 14 Nov	55–109	Sensitive	7:00	23	3 Moderate
Sun 15 Nov	58–70	Moderate	14:00	17	4 Moderate
Mon 16 Nov	62–73	Moderate	7:00	18	3 Moderate
Tue 17 Nov	55–114	Sensitive	23:00	19	4 Moderate

Common questions about the air in Taipei

Is the air in Taipei safe today?
For most people, yes. Right now the US AQI in Taipei is 66, which counts as moderate. Acceptable. Unusually sensitive people should ease off long, intense outdoor effort. It is expected to reach 109 (unhealthy for sensitive groups) around Sat 07:00.
When is the best time to be outside in Taipei?
Sat 22:00–1:00. That is the cleanest stretch in the next 24 hours, with the US AQI averaging about 58. The worst hour is around Sat 07:00, at 109.
What is the main pollutant in Taipei?
Fine particles (PM_2.5). It drives the index right now, at 17 µg/m³. Tiny particles from combustion, fires and dust that reach deep into the lungs. The main driver of AQI worldwide.
How does Taipei's air compare with the WHO guideline?
1.6 times the guideline. Over the next 24 hours PM_2.5 averages about 23 µg/m³, against the World Health Organization's 24-hour guideline of 15 µg/m³. NO₂ is also forecast above its guideline level.
How many cigarettes is a day of Taipei's air?
About 1.1 cigarettes. Over the next 24 hours PM_2.5 averages about 23 µg/m³. By Berkeley Earth's rule of thumb, 22 µg/m³ breathed for a day is roughly one cigarette.
Will air quality in Taipei improve this week?
Sunday looks cleanest. Its AQI peaks at 70, against 114 on Tuesday, the worst day in the forecast.

Measured near Taipei

Station and measurements	Distance	US AQI	Level
臺北市 - 松山 OpenAQ, reference monitor O₃: 16 µg/m³ · Sat 01:00 SO₂: 3.7 µg/m³ · Sat 01:00 CO: 515 µg/m³ · Sat 01:00	2.3 km	7	Good
臺北市 - 古亭 OpenAQ, reference monitor NO₂: 51 µg/m³ · Sat 01:00 O₃: 26 µg/m³ · Sat 01:00 SO₂: 4.7 µg/m³ · Sat 01:00 CO: 607 µg/m³ · Sat 01:00	3.9 km	25	Good
Unnamed sensor OpenAQ, low-cost sensor PM_2.5: 3.1 µg/m³ · Sat 01:00	4.7 km	17	Good

Air quality near Taipei

US AQI right now. Cleanest nearby: Manila (36); worst: Wuhan (168). The tick on each bar is Taipei, at 66.

Shanghai 689 km N 152 Unhealthy
Hong Kong 811 km W 57 Moderate
Shenzhen 812 km W 57 Moderate
Guangzhou 869 km W 109 Sensitive
Wuhan 944 km NW 168 Unhealthy
Manila 1,162 km S 36 Good

All 162 cities →

About this forecast

Forecast from CAMS global via Open-Meteo: the Copernicus Atmosphere Monitoring Service (CAMS) model at about 40 km resolution (about 10 km inside Europe). Global runs update every 12 hours and European runs every 24 hours. Models smooth out street-level peaks, so busy roads and industrial sites can be worse than shown. Nearby station measurements are independent observations, not adjustments to the forecast. The point forecast uses Open-Meteo’s CAMS products, including a separate carbon monoxide product; it can differ from the globe’s global grid. The AQI rates each hour on the US EPA scale, the same way the map colors it; official daily figures average over 24 hours (8 for ozone), so they can read lower after a short peak. Readings for 25.03°N, 121.57°E, valid 2026-11-13 17:00 UTC.