SmogRank / United States / Florida / Tallahassee
Tallahassee, month by month
Tallahassee has a measured daily mean on 1,163 days since 4 January 2023. Its worst month was March 2025, at 60 US AQI (13.7 µg/m³), 1,051st of 2,862 cities on that month's world ranking. Its cleanest was July 2024, at 37 US AQI (6.7 µg/m³). 2025 averaged 52 US AQI (9.8 µg/m³), against 48 US AQI (8.7 µg/m³) in 2024.
Every month since 2023
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 |
|---|---|
| Oct 2026 | 7 of 11 days measured; a month needs 8. The others: 3 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours). |
| Oct 2024 | 8 of 31 days measured; a month needs 22. The others: 23 with under 18 hours of readings or readings that failed our checks. |
| Aug 2023 | 11 of 31 days measured; a month needs 22. The others: 20 with under 18 hours of readings or readings that failed our checks. |
| Jul 2023 | 16 of 31 days measured; a month needs 22. The others: 1 missing from OpenAQ's archive, 14 with under 18 hours of readings or readings that failed our checks. |
| Mar 2023 | 11 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive. |
| Feb 2023 | 2 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive, 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.
Tallahassee's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| March 2025 | 6013.7 µg/m³ | 1,051stof 2,862 | – |
| March 2026 | 5812.7 µg/m³ | 1,100thof 2,971 | South-eastern United States, March 2026 |
| April 2025 | 5712.3 µg/m³ | 728thof 2,951 | – |
| July 2026 | 5511.2 µg/m³ | 1,069thof 2,784 | – |
| February 2024 | 5511.1 µg/m³ | 545thof 2,486 | South-eastern United States, February 2024 |
| February 2026 | 5410.9 µg/m³ | 1,208thof 2,866 | Georgia, Florida and South Carolina, United States, February 2026 |
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.
Tallahassee's worst days
| Day | US AQI | Episode |
|---|---|---|
| 27 Mar 2025 | 14051.2 µg/m³ | – |
| 24 Apr 2024 | 12846.4 µg/m³ | – |
| 3 Oct 2023 | 12143.5 µg/m³ | South-eastern United States, October 2023 |
| 22 Mar 2026 | 11541.0 µg/m³ | – |
| 7 Mar 2025 | 10637.6 µg/m³ | – |
| 20 Mar 2026 | 10436.9 µg/m³ | South-eastern United States, March 2026 |
| 25 Apr 2024 | 10236.1 µg/m³ | – |
| 17 Apr 2025 | 9633.5 µg/m³ | – |
| 19 Mar 2026 | 9633.5 µg/m³ | South-eastern United States, March 2026 |
| 3 Mar 2025 | 8627.7 µg/m³ | – |
Daily means, the highest since 4 Jan 2023; 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, Tallahassee, United States, 4 Jan 2023 – 9 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/tallahassee/history (accessed 13 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.
Tallahassee now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 01:07 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).