Air Quality in Merthyr Tydfil, United Kingdom

Overcast
5.6°C · 96.3% humidity
5.6°
Feels 2.1°
64
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
1 station

Nearby Monitoring Stations

AQI Forecast Calibrated
12 10pm
12
12
64 1am
50
38
30 4am
25
21
19 7am
17
15
14 10am
14
13
13 1pm
15
14
14 4pm
14
14
14 7pm
14
14
Station readings
16
15
CAMS model adj -13
25
25
25
27
27
25
25
25
25
25
25
25
25
25
25
25
27
27
27
27
27
27
27
27
AD 728×90

Air Quality Index Trend

18h · 1 stn

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. Current PM2.5 concentration in Merthyr Tydfil is 1.2× the WHO 24-hour guideline of 15 µg/m³.

96.3%
Humidity
17.2 km/h
Wind W
1021.4 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
64
18.3 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Merthyr Tydfil?

Temperature & Precipitation

PM2.5 Trend

18h · 1 station
PM2.518.3 µg/m³ ×1.2 WHO
Moderate
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (1 station within 25 km)
18.3
Median
18.3
Average
18.3
Low
18.3
High
PM2.5 µg/m³ · Model: 6.15 · Bias: -12.1

What is the 7-day forecast for Merthyr Tydfil?

06-09
16.9° 5.6°
1.19 mm
06-10
12.1° 9.9°
7.69 mm
06-11
23.0° 11.4°
7.37 mm
06-12
17.6° 7.7°
06-13
17.3° 9.1°
0.44 mm
06-14
19.4° 9.3°
0.25 mm
06-15
15.8° 9.6°
2.0 mm
Both models agree Avg diff: 3.5°C

Where are air quality stations near Merthyr Tydfil?

–
Rhondda Mountain Ash
7.1 km
–
Rhondda Pontypridd Gelliwastad Rd
16.1 km
–
Hafod-yr-ynys Hill Roadside
18.4 km
–
Caerphilly Islwyn Road Wattsville
21.6 km
–
Nantgarw Road
21.7 km
21
Caerphilly White Street, United Kingdom
22.3 km PM2.5: 5.0 µg/m³
28
Caerphilly White Street, United Kingdom
22.3 km PM2.5: 6.7 µg/m³

What cities are near Merthyr Tydfil?

64 Aberdare 48 Rhondda 64 Ebbw Vale 52 Gelligaer 51 Blackwood 42 Tonypandy 54 Pontypridd 64 Caerphilly 35 Pontypool 42 Risca
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-06-09T00:19 UTC.