Encinitas, month by month

Encinitas has a measured daily mean on 202 days since 6 March 2026. Its worst month was March 2026, at 53 US AQI (10.1 µg/m³), 1,648th of 2,971 cities on that month's world ranking. Its cleanest was April 2026, at 9 US AQI (1.6 µg/m³).

Every month since 2026

202627 so far202 days measured

JanFebMar53#1,648 Apr9#2,937 May33#1,982 Jun18#2,401 Jul28#2,581 Aug28#2,749 Sep17 Oct31so far

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

Encinitas's worst months

Month	US AQI	Days measured	World rank
March 2026	5310.1 µg/m³	24 of 31	1,648thof 2,971
May 2026	335.9 µg/m³	27 of 31	1,982ndof 2,874
July 2026	285.1 µg/m³	31 of 31	2,581stof 2,784
August 2026	285.0 µg/m³	30 of 31	2,749thof 2,896
June 2026	183.2 µg/m³	29 of 30	2,401stof 2,497
September 2026	173.1 µg/m³	30 of 30	–

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.

Encinitas's worst days

Day	US AQI
17 May 2026	8024.7 µg/m³
20 May 2026	7622.4 µg/m³
28 Mar 2026	7019.4 µg/m³
29 Mar 2026	6918.9 µg/m³
23 Mar 2026	6918.6 µg/m³
22 Mar 2026	6818.3 µg/m³
26 Mar 2026	6617.3 µg/m³
24 Mar 2026	6516.8 µg/m³
25 Mar 2026	6416.0 µg/m³
30 Mar 2026	6315.8 µg/m³

Daily means, the highest since 6 Mar 2026; 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, Encinitas, United States, 6 Mar 2026 – 11 Oct 2026. Monitor data from national networks via OpenAQ and the publishers listed at smogrank.com/sources. smogrank.com/us/encinitas/history (accessed 12 Oct 2026).

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Encinitas 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).