CAMS model • Open-Meteo

Nakhon RatchasimaAir quality, PM2.5 and PM10

Check PM2.5 and PM10 particle levels alongside ozone, nitrogen dioxide and other gases. Compare the latest available concentrations with recent days and explore changes in air pollution through the available historical records.

Nakhon Ratchasima - latest available concentrations (October 23, 2026, 08:00 local time): PM2.5: 12 µg/m³, PM10: 12.5 µg/m³, O₃: 41 µg/m³, NO₂: 7.7 µg/m³, SO₂: 2.6 µg/m³, CO: 281 µg/m³. These are hourly CAMS model values for a point representing the city.

Air quality questions →

1 weather warning in effect for Thailand 🌧️ Heavy rain

Nakhon Ratchasima · Air pollutant concentrations

Data time: October 23, 2026 · 08:00 · local time

PM2.5

Fine particles

12µg/m³Fair · 1 hour

PM10

Particulate matter

12.5µg/m³Good · 1 hour

O₃

Ozone

41µg/m³Good · 1 hour

NO₂

Nitrogen dioxide

7.7µg/m³Good · 1 hour

SO₂

Sulphur dioxide

2.6µg/m³Good · 1 hour

Carbon monoxide

281µg/m³

PM2.5 vs PM10 - what is the difference? → · Models and monitoring stations →

DAILY DATA · Nakhon Ratchasima

Nakhon Ratchasima - air pollution over recent days (2026-08-31 - 2026-10-22)

Concentrations of all available pollutants for this city.

PM2.5Lowest 5.17 2026-09-07Highest 13.19 2026-10-172026-08-31 - 2026-10-22

Scroll the chart or table sideways to see the full period.

Nakhon Ratchasima · daily averages · µg/m³
Pollutant	2026-10-22	2026-10-21	2026-10-20	2026-10-19	2026-10-18	2026-10-17	2026-10-16	2026-09-07	2026-09-06	2026-09-05	2026-09-04	2026-09-03	2026-09-02	2026-09-01	2026-08-31
PM2.5	11.69	9.06	9.77	9.43	10.88	13.19	7.52	5.17	8.13	9.98	10.97	9.99	9.23	8.14	5.96
PM10	13.18	9.45	10.78	10.49	11.93	15.78	8.32	5.8	10.15	12.98	15.7	14.3	13.32	12.3	8.7
O₃	55.71	61.08	59.96	60.88	61.25	63.42	57.29	60.25	70.96	59.63	61.88	63.04	62.71	61.25	50.88
NO₂	10.05	12.46	10.83	6.12	8.68	12.04	10.62	5.55	4.8	7.41	7.48	6.52	6.25	7.53	6.95
SO₂	3.09	3.93	3.8	2.46	3.17	3.97	3.4	3.26	3.53	4.21	4.93	4.83	4.61	4.7	4.28
CO	336.58	287.42	281.29	233.13	273	304.71	279.13	194.13	157.08	163.71	162.79	169.13	172.5	170.79	143.04

A dot on the chart and a dash in the table indicate missing data. The latest day may be incomplete.

How should I interpret the data and averaging period? →

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AIR QUALITY ARCHIVE · Nakhon Ratchasima

Nakhon Ratchasima - air pollution history (2015-10 - 2020-05)

Compare monthly particle and gas concentrations in the available archive.

PM10Lowest 14.9 2017-08Highest 91.1 2018-022015-10 - 2020-05

Scroll the chart or table sideways to see the full period.

Nakhon Ratchasima · monthly averages · units shown beside each pollutant
Pollutant	2020-05	2020-04	2020-03	2020-02	2020-01	2019-12	2019-11	2019-10	2019-09	2019-08	2019-07	2019-06	2019-05	2019-04	2019-03	2019-02	2019-01	2018-12	2018-11	2018-10	2018-09	2018-08	2018-07	2018-06	2018-05	2018-04	2018-03	2018-02	2018-01	2017-12	2017-11	2017-10	2017-09	2017-08	2017-07	2017-06	2017-05	2017-04	2017-03	2017-02	2017-01	2016-12	2016-11	2016-10	2016-09	2016-08	2016-07	2016-06	2016-05	2016-04	2016-03	2016-02	2016-01	2015-12	2015-11	2015-10
PM10 µg/m³	47.3	51.8	73.8	88.2	83.1	75.2	54.6	43.7	40.7	27.6	32.5	33.6	46.8	52.9	74.1	83.8	64.8	59.5	58.3	47.3	35.5	36.5	35.9	38.3	27.4	54.2	86.6	91.1	58.6	49.6	44.5	37.8	16.7	14.9	19.7	20.3	29.9	45.1	69.7	70.3	46.9	58.7	43.4	36.6	27.8	23.8	30.7	27.3	35	63.4	77.1	83.3	62	59.4	31.7	46.5
O₃ (ppm)	0.0367	0.0452	0.0381	0.0335	0.0271	0.0273	0.0328	0.0224	0.024	0.0164	0.0212	0.0379	0.0474	0.0457	0.0407	0.039	0.0316	0.0182	0.0201	0.0245	0.0115	0.00997	0.00932	0.0101	0.0232	0.0308	0.0339	0.0285	0.0188	0.024	0.0198	0.0114	0.0134	0.0113	0.0149	0.0175	0.0261	0.0348	0.0333	0.0136	0.0147	0.019	0.00904	0.00838	0.008	0.00993	0.00894	0.0138	0.0287	0.0356	0.0244	0.0239	0.0233	0.0261	0.016	0.0161
NO₂ (ppm)	0.0166	0.0117	0.0187	0.0216	0.0257	0.0248	0.0179	0.0166	0.0136	0.0113	0.00868	0.00814	0.00734	0.0107	0.0118	0.0164	0.0119	0.0131	0.0123	0.0135	0.0141	0.0118	0.0134	0.0107	0.0118	0.015	0.0208	0.0227	0.0223	0.0214	0.0357	0.007	0.00307	0.00475	0.00735	0.00762	0.00723	0.0092	0.0132	0.0261	0.0158	0.0184	0.013	0.0104	0.0111	0.00847	0.00987	0.0102	0.0136	0.0132	0.0163	0.0175	0.0165	0.0117	0.007	0.00763
SO₂ (ppm)	—	0.00275	0.00111	0.00128	0.00104	0.00117	0.0013	0.001	0.001	0.0028	0.00146	0.00163	0.0011	0.00145	0.00187	0.00175	0.00116	0.00109	—	—	0.00109	0.00105	0.00108	0.0011	0.00115	0.0015	0.0017	0.00144	0.00162	0.00153	0.00274	0.00175	0.00127	0.001	0.0012	0.00153	0.00207	0.00136	0.00923	—	0.00765	0.0102	0.00474	0.0123	0.00439	0.00171	0.00557	0.0045	0.00553	0.00624	0.00558	0.00604	0.00504	0.00214	0.00686	0.00275
CO (ppm)	0.314	0.494	0.613	0.629	0.66	0.532	0.571	0.332	0.531	0.376	0.349	1.37	0.512	0.608	0.723	0.723	0.798	0.74	0.622	0.443	0.306	0.305	0.433	0.177	0.334	0.47	0.588	0.74	0.766	3.52	11.5	13.8	0.41	0.266	0.413	0.365	0.624	0.563	0.484	1.11	0.76	0.756	0.876	0.761	0.688	0.485	0.516	0.489	0.285	0.807	1.06	1.19	0.888	0.786	0.587	0.645

A dot on the chart and a dash in the table indicate missing data. Historical values do not describe today’s air quality.

How should I interpret the data and averaging period? →

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Historical data by station 1

AIR QUALITY ARCHIVE · Nai Mueang, Mueang

Nai Mueang, Mueang

Station code: Nai Mueang, Mueang

Monthly monitoring station data.

PM10Lowest 14.9 2017-08Highest 91.1 2018-022015-10 - 2020-05

Scroll the chart or table sideways to see the full period.

Nai Mueang, Mueang · monthly averages · units shown beside each pollutant
Pollutant	2020-05	2020-04	2020-03	2020-02	2020-01	2019-12	2019-11	2019-10	2019-09	2019-08	2019-07	2019-06	2019-05	2019-04	2019-03	2019-02	2019-01	2018-12	2018-11	2018-10	2018-09	2018-08	2018-07	2018-06	2018-05	2018-04	2018-03	2018-02	2018-01	2017-12	2017-11	2017-10	2017-09	2017-08	2017-07	2017-06	2017-05	2017-04	2017-03	2017-02	2017-01	2016-12	2016-11	2016-10	2016-09	2016-08	2016-07	2016-06	2016-05	2016-04	2016-03	2016-02	2016-01	2015-12	2015-11	2015-10
PM10 µg/m³	47.3	51.8	73.8	88.2	83.1	75.2	54.6	43.7	40.7	27.6	32.5	33.6	46.8	52.9	74.1	83.8	64.8	59.5	58.3	47.3	35.5	36.5	35.9	38.3	27.4	54.2	86.6	91.1	58.6	49.6	44.5	37.8	16.7	14.9	19.7	20.3	29.9	45.1	69.7	70.3	46.9	58.7	43.4	36.6	27.8	23.8	30.7	27.3	35	63.4	77.1	83.3	62	59.4	31.7	46.5
O₃ (ppm)	0.0367	0.0452	0.0381	0.0335	0.0271	0.0273	0.0328	0.0224	0.024	0.0164	0.0212	0.0379	0.0474	0.0457	0.0407	0.039	0.0316	0.0182	0.0201	0.0245	0.0115	0.00997	0.00932	0.0101	0.0232	0.0308	0.0339	0.0285	0.0188	0.024	0.0198	0.0114	0.0134	0.0113	0.0149	0.0175	0.0261	0.0348	0.0333	0.0136	0.0147	0.019	0.00904	0.00838	0.008	0.00993	0.00894	0.0138	0.0287	0.0356	0.0244	0.0239	0.0233	0.0261	0.016	0.0161
NO₂ (ppm)	0.0166	0.0117	0.0187	0.0216	0.0257	0.0248	0.0179	0.0166	0.0136	0.0113	0.00868	0.00814	0.00734	0.0107	0.0118	0.0164	0.0119	0.0131	0.0123	0.0135	0.0141	0.0118	0.0134	0.0107	0.0118	0.015	0.0208	0.0227	0.0223	0.0214	0.0357	0.007	0.00307	0.00475	0.00735	0.00762	0.00723	0.0092	0.0132	0.0261	0.0158	0.0184	0.013	0.0104	0.0111	0.00847	0.00987	0.0102	0.0136	0.0132	0.0163	0.0175	0.0165	0.0117	0.007	0.00763
SO₂ (ppm)	—	0.00275	0.00111	0.00128	0.00104	0.00117	0.0013	0.001	0.001	0.0028	0.00146	0.00163	0.0011	0.00145	0.00187	0.00175	0.00116	0.00109	—	—	0.00109	0.00105	0.00108	0.0011	0.00115	0.0015	0.0017	0.00144	0.00162	0.00153	0.00274	0.00175	0.00127	0.001	0.0012	0.00153	0.00207	0.00136	0.00923	—	0.00765	0.0102	0.00474	0.0123	0.00439	0.00171	0.00557	0.0045	0.00553	0.00624	0.00558	0.00604	0.00504	0.00214	0.00686	0.00275
CO (ppm)	0.314	0.494	0.613	0.629	0.66	0.532	0.571	0.332	0.531	0.376	0.349	1.37	0.512	0.608	0.723	0.723	0.798	0.74	0.622	0.443	0.306	0.305	0.433	0.177	0.334	0.47	0.588	0.74	0.766	3.52	11.5	13.8	0.41	0.266	0.413	0.365	0.624	0.563	0.484	1.11	0.76	0.756	0.876	0.761	0.688	0.485	0.516	0.489	0.285	0.807	1.06	1.19	0.888	0.786	0.587	0.645

PM1015

µg/m³

PM2.5 · Fair

NO₂ 21.3O₃ 70

October 23, 202608:00

Thailand · air quality in other cities

Bangkok Samut Prakan Province Udon Thani Chonburi Chiang Mai Hat Yai Pak Kret Si Racha Lampang Khon Kaen Surat Thani Rangsit Ubon Ratchathani Nakhon Si Thammarat Khlong Luang District Nakhon Pathom Rayong Phitsanulok

WEATHER & SURROUNDINGS

Thailand · weather forecast

Daily maximum and minimum temperatures. Forecast point: 15.87, 100.9925. Forecast for a country reference point; conditions in the city may differ.

Scroll the forecast to see the following days.

Thailand · October 20, 2026: minimum temperature 26.7°C, maximum 34.2°C. Wind: 7.7 km/h. Humidity: 70%.

Full forecast: temperature, rainfall, wind and humidity

Date	Day °C	Min °C	Max °C	Night °C	Rain mm	Wind m/s	Humidity %	Clouds %
2026-10-20	31.3	26.7	34.2	27.3	0.5	2.1	70	58
2026-10-21	31.2	26.3	33.6	27.5	0.9	2.3	73	1
2026-10-22	30.5	25.8	33.3	27	1.4	2.2	72	6
2026-10-23	32.8	24.9	33.6	27.1	0.3	2.4	65	7
2026-10-24	30.9	23.3	31.8	25.8	1.3	2.2	66	100
2026-10-25	32	23.3	32	25.6	5.4	1.5	63	38
2026-10-26	28.5	24.2	31.5	24.6	5.9	2.3	78	100
2026-10-27	28.2	22.6	30.1	24.2	9.9	6.7	74	11
2026-10-28	27.8	22.4	29.8	23.8	2.6	5.7	69	17
2026-10-29	27.6	22	30.3	24.2	1.6	2.3	73	79
2026-10-30	27.9	23.2	30.4	24.9	5.4	2.2	76	97
2026-10-31	26.6	23.5	29.6	24.7	4.7	1.9	82	97
2026-11-01	27.3	22.9	29.8	25	7.3	1.8	81	71
2026-11-02	28.4	23.4	31.2	24.9	2.8	2.4	75	83
2026-11-03	28.4	23.3	29.8	23.6	4.7	6.8	74	88
2026-11-04	26.8	22.1	29.3	23.5	1.4	4.1	72	13
2026-11-05	27.2	21.8	30.2	23.3	2.7	4.2	75	41
2026-11-06	27.2	22.1	29.9	24.1	4.1	3.3	77	66

UV index by day · Thailand

Data for a country reference point. Local conditions may differ.

SPF 30-50, hat and sunglasses are a must. Better to stay in the shade 11:00-15:00.

0-2 low3-5 moderate6-7 high8-10 very high11+ extreme

Scroll the forecast to see the following days.

Thailand · October 22, 2026: UV index: 7.6 .

Indicator	2026-10-22	2026-10-23	2026-10-24	2026-10-25	2026-10-26	2026-10-27	2026-10-28	2026-10-29	2026-10-30	2026-10-31	2026-11-01	2026-11-02	2026-11-03	2026-11-04	2026-11-05	2026-11-06
UV index	7.6	7.7	7.6	7.6	6.6	7.5	7.4	7.3	7.2	7.4	2	2.9	7.3	7.2	7.2	—

Open-Meteo ↗

AIR QUALITY QUESTIONS

Nakhon Ratchasima · air pollution - questions and answers

What do the latest air quality data show for Nakhon Ratchasima?

When was PM2.5 highest in Nakhon Ratchasima over the past week?

The highest available daily mean PM2.5 was 13.2 µg/m³ (October 17, 2026). This comparison covers 7 days with data in the seven days before October 23, 2026. The day of the latest reading is excluded because it may be incomplete.

What period does the pollution history for Nakhon Ratchasima cover?

Available monthly means cover 2015-10 - 2020-05. The tables include PM10, O₃ (ppm), NO₂ (ppm), SO₂ (ppm), CO (ppm). Missing values are marked with a dash, not treated as zero. Monthly archives and current model data may come from different sources.

Is the PM2.5 concentration for Nakhon Ratchasima an AQI score?

No. PM2.5 and PM10 are concentrations in µg/m³. AQI is a separate index calculated using a defined scale. When comparing air quality, also check other pollutants, the date and the averaging period.

What UV index does the available forecast show for Nakhon Ratchasima?

For October 22, 2026, the forecast UV index is 7.6. The UV section also shows the following available days. The forecast is for a country reference point (Thailand), not the city itself.

What wind speed is forecast for Nakhon Ratchasima?

For October 20, 2026, forecast wind speed is 7.7 km/h. The weather table includes wind, temperature and other available parameters for subsequent days. These data describe a country reference point (Thailand); local wind may differ.

PM2.5 · PM10 · NO₂ · O₃

Understanding air quality and pollution data

What do PM2.5 and PM10 mean?

PM2.5 and PM10 are fractions of airborne particulate matter. PM2.5 covers fine particles up to 2.5 micrometres in diameter, while PM10 covers particles up to 10 micrometres. Concentrations in µg/m³ tell you how many micrograms of particles are present in a cubic metre of air. Compare values over the same time period.

Where does the air pollution data come from?

The latest concentrations come from the CAMS atmospheric model via Open-Meteo for each city’s coordinates. Values describe a model area, so conditions on individual streets may differ. Historical monitoring station data is shown separately where available.

How does PM2.5 concentration differ from AQI?

PM2.5 is the concentration of one particle fraction, expressed in µg/m³. AQI is an index calculated using a particular scale and thresholds. The pollutant cards show concentrations. Our city ranking compares PM2.5; PM10, ozone, nitrogen dioxide and other available gases add to the picture of air quality.

Which dates do the values and charts cover?

Each current value has a data date and time. Current concentration cards show the latest available hour, daily charts summarise individual days, and monthly records let you compare longer periods. These values represent different time intervals.

How can I check pollution in my city?

Search for your city and open its air quality page. Start with PM2.5 and PM10, then check the other available pollutants and the data timestamp. Charts and tables help you compare concentrations over time. Weather and historical climate information complement the pollution data.

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