SmogRank / Slovenia / Urban Municipality of Nova Gorica / Nova Gorica
Nova Gorica, month by month
Nova Gorica has a measured daily mean on 742 days since 27 March 2024. Its worst month was February 2025, at 84 US AQI (26.6 µg/m³), 252nd of 2,633 cities on that month's world ranking. Its cleanest was September 2026, at 30 US AQI (5.4 µg/m³).
Every month since 2024
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
6 months
| Month | Why |
|---|---|
| Jun 2026 | 16 of 30 days measured; a month needs 21. The others: 4 with readings for part of the day (a day needs 18 hours), 5 with readings left out by our checks, 5 with under 18 hours of readings or readings that failed our checks. |
| May 2026 | 17 of 31 days measured; a month needs 22. The others: 1 with readings for part of the day (a day needs 18 hours), 3 with readings left out by our checks, 10 with under 18 hours of readings or readings that failed our checks. |
| Oct 2024 | No day measured. The others: 17 with no readings from the monitor, 14 with readings for part of the day (a day needs 18 hours). |
| Sep 2024 | No day measured. The others: 30 with readings for part of the day (a day needs 18 hours). |
| Aug 2024 | 9 of 31 days measured; a month needs 22. The others: 5 with no readings from the monitor, 17 with readings for part of the day (a day needs 18 hours). |
| Mar 2024 | 5 of 31 days measured; a month needs 22. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Nova Gorica's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| February 2025 | 8426.6 µg/m³ | 252ndof 2,633 | Europe, 14 February to 1 March 2025 Europe, 1 to 14 February 2025 |
| November 2024 | 7823.8 µg/m³ | 132ndof 2,624 | Eastern Europe, 25 to 29 November 2024 Southern Europe, November 2024and 1 more |
| January 2025 | 7622.5 µg/m³ | 227thof 2,474 | Germany, France and 19 more countries, January 2025 Europe, 24 December 2024 to 3 January 2025 |
| January 2026 | 7522.0 µg/m³ | 335thof 2,617 | Europe, January and February 2026 Eastern Europe, January 2026 |
| December 2024 | 7120.0 µg/m³ | 264thof 2,616 | Europe, 24 December 2024 to 3 January 2025 Serbia, Slovenia and 10 more countries, December 2024 |
| December 2025 | 6416.3 µg/m³ | 673rdof 3,006 | Southern Europe, December 2025 |
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.
Nova Gorica's worst days
| Day | US AQI | Episode |
|---|---|---|
| 2 Jan 2025 | 16880.1 µg/m³ | Europe, 24 December 2024 to 3 January 2025 |
| 14 Nov 2025 | 15967.4 µg/m³ | Southern Europe, November 2025 |
| 23 Feb 2025 | 15764.0 µg/m³ | Europe, 14 February to 1 March 2025 |
| 1 Jan 2025 | 15358.1 µg/m³ | Europe, 24 December 2024 to 3 January 2025 |
| 22 Feb 2025 | 15257.1 µg/m³ | Europe, 14 February to 1 March 2025 |
| 18 Dec 2024 | 14754.2 µg/m³ | Serbia, Slovenia and 10 more countries, December 2024 |
| 13 Nov 2025 | 14352.4 µg/m³ | Southern Europe, November 2025 |
| 11 Feb 2025 | 13850.7 µg/m³ | Europe, 1 to 14 February 2025 |
| 24 Feb 2025 | 13850.6 µg/m³ | Europe, 14 February to 1 March 2025 |
| 19 Nov 2024 | 13850.4 µg/m³ | Southern Europe, November 2024 |
Daily means, the highest since 27 Mar 2024; 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, Nova Gorica, Slovenia, 27 Mar 2024 – 11 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/si/nova-gorica/history (accessed 12 Oct 2026).
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.
Nova Gorica now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 21:07 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).