What is the air quality in Merthyr Tydfil today?

The current Air Quality Index (AQI) in Merthyr Tydfil is 18 (Good). PM2.5 concentration is 4.25 µg/m³.

What is the temperature in Merthyr Tydfil right now?

The current temperature in Merthyr Tydfil is 10.7°C (feels like 10.7°C). Humidity is 63.1% and wind speed is 31.4 km/h.

Is it safe to go outside in Merthyr Tydfil?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in Merthyr Tydfil, United Kingdom

Partly Cloudy

10.7°C · 63.1% humidity

10.7°

Feels 10.7°

Good

Air quality is satisfactory. Enjoy outdoor activities.

4 stations

Nearby Monitoring Stations

AQI Forecast

— 11am

—

18 2pm

—

— 5pm

—

— 8pm

—

— 11pm

—

— 2am

—

— 5am

—

— 8am

—

Station readings

Air Quality Index Trend

27h · 2 stn

View full history →

Merthyr Tydfil's air quality is shaped by traffic emissions and residential heating. Pollution levels tend to peak during winter months when cold air traps emissions close to ground level.

63.1%

Humidity

31.4 km/h

Wind NNW

1020.3 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

4.25 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Merthyr Tydfil?

Temperature & Precipitation

PM2.5 Trend

27h · 2 stations

PM2.54.25 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (4 stations within 25 km)

4.25

Median

4.22

Average

1.7

Low

7.0

High

PM2.5 µg/m³ · Model: 5.8 · Bias: +1.5

What is the 7-day forecast for Merthyr Tydfil?

10-21

10.7° 3.2°

10-22

16.3° 5.4°

1.94 mm

10-23

9.8° 6.4°

9.44 mm

10-24

11.8° 6.5°

10-25

11.5° 4.6°

23.06 mm

10-26

7.8° 5.4°

4.44 mm

10-27

15.7° 2.7°

11.63 mm

Both models agree Avg diff: 3.6°C

Where are air quality stations near Merthyr Tydfil?

–

Rhondda Mountain Ash

7.1 km

Rhondda Glyncoch Garth Avenue, United Kingdom

14.6 km PM2.5: 4.1 µg/m³

Rhondda Glyncoch Garth Avenue, United Kingdom

14.6 km PM2.5: 7.0 µg/m³

Rhondda Glyncoch Garth Avenue, United Kingdom

14.6 km PM2.5: 1.7 µg/m³

–

Rhondda Pontypridd Gelliwastad Rd

16.1 km

–

Hafod-yr-ynys Hill Roadside

18.4 km

–

Caerphilly Islwyn Road Wattsville

Caerphilly White Street, United Kingdom

22.3 km PM2.5: 4.1 µg/m³

What cities are near Merthyr Tydfil?

18 Aberdare 18 Rhondda 18 Ebbw Vale 18 Gelligaer 18 Blackwood 20 Tonypandy 18 Pontypridd 17 Caerphilly 15 Pontypool 17 Risca

Get AQI alerts for Merthyr Tydfil

Notify me when air quality reaches:

ModerateAQI > 50 Unhealthy for Sensitive GroupsAQI > 100 UnhealthyAQI > 150 Very UnhealthyAQI > 200

Free · No account · Unsubscribe any time

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-10-21T13:15 UTC.