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
Air Quality Index Trend
18h · 1 stnMerthyr 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▲
18.3 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Merthyr Tydfil?
Temperature & Precipitation
PM2.5 Trend
18h · 1 stationPM2.518.3 µg/m³
×1.2 WHO
Moderate
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
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
–
Rhondda Pontypridd Gelliwastad Rd
–
Hafod-yr-ynys Hill Roadside
–
Caerphilly Islwyn Road Wattsville
–
Nantgarw Road
21
Caerphilly White Street, United Kingdom
28
Caerphilly White Street, United Kingdom
What cities are near Merthyr Tydfil?
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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.