Air Quality in Welwyn Garden City, United Kingdom
Windy
13.4°C · 57.6% humidity
13.4°
Feels 13.4°
38
Good
Air quality is satisfactory. Enjoy outdoor activities.
2 stations
Nearby Monitoring Stations
Welwyn Garden City's air quality — share it
AQI Forecast
54
12am
54
54
38
3am
43
26
21
6am
21
22
23
9am
23
26
26
12pm
26
27
27
3pm
27
25
25
6pm
25
25
25
9pm
25
25
Air Quality Index Trend
48h · 6 stnWelwyn Garden City'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.
57.6%
Humidity
45.8 km/h
Wind ENE
1015.7 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
9.0 µg/m³
PM10
20.55 µg/m³
050100150200300500
What is the weather forecast for Welwyn Garden City?
Temperature & Precipitation
PM2.5 Trend
48h · 6 stationsPM2.59.0 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
Station readings (2 stations within 25 km)
9.0
Median
9.0
Average
7.7
Low
10.3
High
PM2.5 µg/m³ · Model: 9.75 · Bias: +0.8
What is the 7-day forecast for Welwyn Garden City?
07-22
23.8° 13.4°
0.19 mm
07-23
19.4° 15.4°
2.0 mm
07-24
22.1° 14.8°
3.0 mm
07-25
29.2° 13.3°
0.13 mm
07-26
18.2° 13.3°
2.38 mm
07-27
26.9° 16.4°
4.13 mm
07-28
25.7° 16.6°
Both models agree
Avg diff: 2.7°C
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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 2026-07-22T02:20 UTC.