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Air quality · Montevideo Department, Uruguay

Montevideo Air Quality Index (AQI) today

Modelled estimate for 09:00 local time (UTC-3), refreshed 3 Nov, 07:52 UTC+0.

44 Good

Live estimate · modelled

US EPA AQI09:00 UTC-3, 3 Nov Main pollutant: PM2.5

Air quality is satisfactory, and air pollution poses little or no risk.

This page uses EPA’s NowCast, which follows the last few hours, as the US government’s AirNow does. On a 24-hour average of particles, as many apps show, it is 59.

Over the next 24 hours the model expects the AQI to range from 20 around 03:00 to 38 around 20:00 (3 Nov).

683rd most polluted of 849 cities worldwide right now.

What to do today

  • Long walk or run outside OK
  • Kids playing outside OK
  • Airing the house Open
  • Mask outdoors Not needed

Based on the US EPA’s health statement: “Air quality is satisfactory, and air pollution poses little or no risk.” General guidance, not medical advice.

Last 24 hours and next 48

Past hours Forecast

10:00 · 47 11:00 · 53 12:00 · 57 13:00 · 61 14:00 · 63 15:00 · 66 16:00 · 66 17:00 · 65 18:00 · 64 19:00 · 62 20:00 · 60 21:00 · 59 22:00 · 58 23:00 · 58 00:00 · 57 01:00 · 57 02:00 · 58 03:00 · 59 04:00 · 59 05:00 · 58 06:00 · 58 07:00 · 57 08:00 · 53 09:00 · 44 10:00 · 37 11:00 · 31 12:00 · 31 13:00 · 33 14:00 · 34 15:00 · 35 16:00 · 36 17:00 · 36 18:00 · 35 19:00 · 36 20:00 · 38 21:00 · 36 22:00 · 32 23:00 · 26 00:00 · 23 01:00 · 22 02:00 · 21 03:00 · 20 04:00 · 20 05:00 · 20 06:00 · 20 07:00 · 21 08:00 · 22 09:00 · 24 10:00 · 28 11:00 · 32 12:00 · 38 13:00 · 45 14:00 · 52 15:00 · 56 16:00 · 57 17:00 · 59 18:00 · 61 19:00 · 64 20:00 · 67 21:00 · 70 22:00 · 73 23:00 · 74 00:00 · 72 01:00 · 66 02:00 · 59 03:00 · 54 04:00 · 49 Now

US EPA AQI per hour, UTC-3. Particles use EPA’s NowCast (a 12-hour weighted average), ozone and CO an 8-hour average. Lighter bars are the CAMS forecast.

Show as a table
TimeAQI
Mon 10:0047
Mon 11:0053
Mon 12:0057
Mon 13:0061
Mon 14:0063
Mon 15:0066
Mon 16:0066
Mon 17:0065
Mon 18:0064
Mon 19:0062
Mon 20:0060
Mon 21:0059
Mon 22:0058
Mon 23:0058
Tue 00:0057
Tue 01:0057
Tue 02:0058
Tue 03:0059
Tue 04:0059
Tue 05:0058
Tue 06:0058
Tue 07:0057
Tue 08:0053
Tue 09:00 · Now44
Tue 10:00 · Forecast37
Tue 11:00 · Forecast31
Tue 12:00 · Forecast31
Tue 13:00 · Forecast33
Tue 14:00 · Forecast34
Tue 15:00 · Forecast35
Tue 16:00 · Forecast36
Tue 17:00 · Forecast36
Tue 18:00 · Forecast35
Tue 19:00 · Forecast36
Tue 20:00 · Forecast38
Tue 21:00 · Forecast36
Tue 22:00 · Forecast32
Tue 23:00 · Forecast26
Wed 00:00 · Forecast23
Wed 01:00 · Forecast22
Wed 02:00 · Forecast21
Wed 03:00 · Forecast20
Wed 04:00 · Forecast20
Wed 05:00 · Forecast20
Wed 06:00 · Forecast20
Wed 07:00 · Forecast21
Wed 08:00 · Forecast22
Wed 09:00 · Forecast24
Wed 10:00 · Forecast28
Wed 11:00 · Forecast32
Wed 12:00 · Forecast38
Wed 13:00 · Forecast45
Wed 14:00 · Forecast52
Wed 15:00 · Forecast56
Wed 16:00 · Forecast57
Wed 17:00 · Forecast59
Wed 18:00 · Forecast61
Wed 19:00 · Forecast64
Wed 20:00 · Forecast67
Wed 21:00 · Forecast70
Wed 22:00 · Forecast73
Wed 23:00 · Forecast74
Thu 00:00 · Forecast72
Thu 01:00 · Forecast66
Thu 02:00 · Forecast59
Thu 03:00 · Forecast54
Thu 04:00 · Forecast49

Pollutants this hour

  • PM2.5 6.1 µg/m³ 24-hour mean 13.2 µg/m³ · within WHO’s 24-hour guideline (15) 44
  • PM10 8 µg/m³ 9
  • O₃ 70 µg/m³ 27
  • NO₂ 4 µg/m³ 2
  • SO₂ 2 µg/m³ 0
  • CO 0.30 mg/m³ 2

Modelled concentrations at the city’s location (CAMS). The sub-index uses the same averaging as the headline, so the highest one is the AQI.

Nearby cities

City AQI
Buenos Aires Argentina 64
Rosario Argentina 32
Porto Alegre Brazil 51
Córdoba Argentina 78
Asunción Paraguay 22
Curitiba Brazil 57
Santiago Chile 82

Where this number comes from

The Copernicus Atmosphere Monitoring Service (CAMS) forecasts air pollution worldwide on a grid (about 11 km over Europe, about 45 km elsewhere). We take the grid value at Montevideo’s coordinates and score it with the US EPA’s method. It is a model, not a measurement: a nearby monitoring station can read quite differently, especially next to busy roads or during fires and dust storms.

Full methodology · Data: CAMS via Open-Meteo (CC BY 4.0); city list: GeoNames (CC BY 4.0).

  • Good 0–50
  • Moderate 51–100
  • Unhealthy for sensitive groups 101–150
  • Unhealthy 151–200
  • Very unhealthy 201–300
  • Hazardous 301–500

Questions

What is the AQI in Montevideo right now?
44 on the US EPA scale (Good) at 09:00 UTC-3, 3 Nov. PM2.5 is the pollutant with the highest sub-index. This is a modelled estimate from the Copernicus Atmosphere Monitoring Service (CAMS), not a reading from a monitoring station.

Is it safe to exercise outside in Montevideo today?
For most people, yes. The EPA’s statement for “Good”: Air quality is satisfactory, and air pollution poses little or no risk. General guidance, not medical advice.

Will the air in Montevideo get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 20 around 03:00 to 38 around 20:00 (3 Nov). Forecasts beyond a day are less certain.

How does Montevideo compare with other cities?
Right now it is the 683rd most polluted of 849 cities we track worldwide, all on the same US EPA scale.

Why does another app show a different AQI for Montevideo?
Apps differ in source (government stations, low-cost sensors or a model like this one), in scale (US EPA, European, or a national index) and in averaging (hourly or NowCast, 8-hour, 24-hour). This page uses the US EPA AQI with EPA’s NowCast for particles, computed from the CAMS forecast for the city’s location.