SmogRank / Senegal / Ziguinchor / Ziguinchor

Ziguinchor, month by month

Ziguinchor has a measured daily mean on 331 days since 11 November 2025. Its worst month was January 2026, at 92 US AQI (31.3 µg/m³), 161st of 2,617 cities on that month's world ranking. Its cleanest was August 2026, at 40 US AQI (7.2 µg/m³).

Every month since 2025

202663 so far281 days measured532nd of 2,791 in the world
Jan92#161Feb84#325Mar63#821Apr66#482May55#622Jun55#540Jul43#1,939Aug40#1,998Sep56#494Oct57#382
2025too few days for a mean (a year needs 256)50 days measured
JanFebMarAprMayJunJulAugSepOctNov19 daysDec78#387
Each square is a month's mean PM2.5 in US AQI from Ziguinchor's measured days, with its place on that month's world ranking under it. A month has a mean once 70% of its days are measured, the rule the monthly rankings use; under that, the square gives the days measured. Each square opens that month's ranking with Ziguinchor marked; each year, the year's. A dashed square is the running month, so far.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Months without a mean, and why

1 month
MonthWhy
Nov 202519 of 30 days measured; a month needs 21. The others: 1 with under 18 hours of readings or readings that failed our checks.

A day counts once 18 hours of it are measured; a month needs 70% of its days.

Ziguinchor's worst months

MonthUS AQIDays measuredWorld rank
January 2026 9231.3 µg/m³31 of 31161stof 2,617
February 2026 8426.6 µg/m³28 of 28325thof 2,866
December 2025 7823.7 µg/m³31 of 31387thof 3,006
April 2026 6617.4 µg/m³30 of 30482ndof 2,941
March 2026 6315.3 µg/m³31 of 31821stof 2,971
September 2026 5611.9 µg/m³30 of 30494thof 2,981

Monthly means over the days measured; finished months only. World rank: its place on that month's world ranking of every city with enough days. Each month opens that ranking.

Ziguinchor's worst days

DayUS AQI
28 Jan 2026 16067.7 µg/m³
27 Jan 2026 15763.9 µg/m³
26 Jan 2026 15561.1 µg/m³
17 Feb 2026 15459.6 µg/m³
29 Jan 2026 13750.2 µg/m³
30 Dec 2025 13248.1 µg/m³
25 Jan 2026 12444.9 µg/m³
1 Mar 2026 11641.7 µg/m³
13 Jan 2026 11641.5 µg/m³
18 Feb 2026 11440.7 µg/m³

Daily means, the highest since 11 Nov 2025; the WHO's daily guideline is 15 µg/m³. Each date opens that day's world ranking, and each episode the bad-air spell it was part of.

Use this history

SmogRank, PM2.5 monthly and daily means, Ziguinchor, Senegal, 11 Nov 2025 – 11 Oct 2026. Monitor data from AirGradient via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/sn/ziguinchor/history (accessed 12 Oct 2026).

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.

Ziguinchor now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-12 18:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).