Air Quality in Horsham, United Kingdom
Windy
15.2°C · 62.8% humidity
15.2°
Feels 15.2°
28
Good
Air quality is satisfactory. Enjoy outdoor activities.
2 stations
Nearby Monitoring Stations
Horsham's air quality — share it
AQI Forecast
Calibrated
8
3pm
8
8
28
6pm
24
20
17
9pm
15
14
13
12am
19
11
11
3am
11
9
8
6am
8
10
10
9am
10
10
17
12pm
17
10
Station readings
5
5
7
11
CAMS model
adj -17
25
25
25
25
27
27
27
27
27
27
34
27
27
27
25
25
25
27
27
27
27
34
34
27
Air Quality Index Trend
33h · 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.
62.8%
Humidity
99.0 km/h
Wind NE
1022.5 hPa
Pressure
2.9
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
6.82 µg/m³
PM10
20.55 µg/m³
050100150200300500
What is the weather forecast for Horsham?
Temperature & Precipitation
PM2.5 Trend
33h · 1 stationPM2.56.82 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX2.9
Moderate
Station readings (2 stations within 25 km)
6.82
Median
6.4
Average
1.8
Low
11.0
High
PM2.5 µg/m³ · Model: 6.25 · Bias: -0.6
What is the 7-day forecast for Horsham?
05-29
15.2° 11.6°
1.56 mm
05-30
19.1° 12.4°
05-31
23.0° 10.2°
0.75 mm
06-01
20.3° 9.0°
0.25 mm
06-02
19.2° 11.0°
1.56 mm
06-03
17.1° 12.4°
0.06 mm
06-04
23.6° 18.1°
4.63 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 2026-05-29T17:50 UTC.