SmogRank / United States / Kentucky / Nicholasville

Nicholasville, month by month

Nicholasville has a measured daily mean on 609 days since 3 February 2025. Its worst month was February 2026, at 48 US AQI (8.7 µg/m³), 1,771st of 2,866 cities on that month's world ranking. Its cleanest was May 2025, at 25 US AQI (4.5 µg/m³).

Every month since 2025

202638 so far279 days measured2,254th of 2,791 in the world

Jan41#1,712 Feb48#1,771 Mar39#2,338 Apr37#1,984 May30#2,187 Jun33#1,911 Jul44#1,912 Aug42#1,813 Sep36#1,535 Oct28#2,162

202536 for the year330 days measured2,243rd of 2,681 in the world

JanFeb36#1,999 Mar37#2,172 Apr33#2,285 May25#2,464 Jun47#1,720 Jul43#1,824 Aug34#2,476 Sep39#1,648 Oct26#2,178 Nov32#2,220 Dec45#1,810

Each square is a month's mean PM2.5 in US AQI from Nicholasville'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 Nicholasville 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

Nicholasville's worst months

Month	US AQI	Days measured	World rank
February 2026	488.7 µg/m³	28 of 28	1,771stof 2,866
June 2025	478.5 µg/m³	30 of 30	1,720thof 2,508
December 2025	458.1 µg/m³	31 of 31	1,810thof 3,006
July 2026	447.9 µg/m³	29 of 31	1,912thof 2,784
July 2025	437.8 µg/m³	31 of 31	1,824thof 2,889
August 2026	427.6 µg/m³	31 of 31	1,813thof 2,896

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.

Nicholasville's worst days

Day	US AQI
4 Jun 2025	7220.6 µg/m³
4 Jul 2025	7120.0 µg/m³
5 Feb 2026	7019.4 µg/m³
1 Jul 2026	6918.7 µg/m³
20 Jul 2026	6918.6 µg/m³
11 Jun 2025	6818.3 µg/m³
12 Jun 2025	6818.2 µg/m³
4 Feb 2026	6717.8 µg/m³
24 Dec 2025	6416.2 µg/m³
26 Mar 2026	6416.1 µg/m³

Daily means, the highest since 3 Feb 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, Nicholasville, United States, 3 Feb 2025 – 11 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/nicholasville/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.

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

Updated 2026-10-12 20:07 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).