Air Quality in Horsham, United Kingdom
Windy
16.3°C · 65.0% humidity
16.3°
Feels 16.3°
44
Good
Air quality is satisfactory. Enjoy outdoor activities.
2 stations
Nearby Monitoring Stations
Horsham's air quality — share it
AQI Forecast
Calibrated
0
5am
0
0
44
8am
37
27
19
11am
14
10
7
2pm
5
4
3
5pm
2
1
1
8pm
1
0
0
11pm
0
0
0
2am
0
0
Station readings
9h ago
AQI 15
PM2.5 3.7 µg/m³ · 9h ago
CAMS model
adj -42
34
34
34
34
34
27
27
27
27
27
27
27
27
27
27
27
25
25
25
25
25
25
25
25
Air Quality Index Trend
31h · 1 stnHorsham'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.
65.0%
Humidity
61.3 km/h
Wind ENE
1014.6 hPa
Pressure
2.9
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
10.55 µg/m³
PM10
20.55 µg/m³
050100150200300500
What is the weather forecast for Horsham?
Temperature & Precipitation
PM2.5 Trend
31h · 1 stationPM2.510.55 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX2.9
Moderate
Station readings (2 stations within 25 km)
10.55
Median
10.55
Average
9.1
Low
12.0
High
PM2.5 µg/m³ · Model: 7.35 · Bias: -3.2
What is the 7-day forecast for Horsham?
07-22
23.8° 15.2°
07-23
22.2° 17.4°
07-24
18.8° 15.4°
2.12 mm
07-25
26.5° 12.4°
0.38 mm
07-26
21.3° 12.5°
0.31 mm
07-27
25.8° 17.6°
3.81 mm
07-28
24.4° 16.0°
0.06 mm
Both models agree
Avg diff: 3.1°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 2026-07-22T07:48 UTC.