What is the air quality trend in Semi?

Over the past 10 days, Semi had an average AQI of 50 based on station measurements. The worst day was 2026-10-21 with AQI 70.

How is Semi air quality measured?

Air quality in Semi is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for Semi, Benin

Name: Semi Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Semi, Benin.

Current AQI
Moderate CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

14h

PM2.5 Station

14h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-31	34	34–34	8.2 µg/m³	1h	1
2026-10-30	37	37–37	8.9 µg/m³	1h	1
2026-10-29	66	66–66	19.3 µg/m³	1h	1
2026-10-28	40	40–41	9.8 µg/m³	2h	1
2026-10-27	36	18–55	9.3 µg/m³	2h	1
2026-10-26	50	45–55	12.5 µg/m³	2h	1
2026-10-25	57	57–57	14.8 µg/m³	1h	1
2026-10-24	52	52–52	12.5 µg/m³	1h	1
2026-10-22	63	63–63	17.6 µg/m³	1h	1
2026-10-21	70	53–88	21.4 µg/m³	2h	1

Back to Semi Air Quality