Honolulu Air Quality in November
Across 2019–2025, Honolulu's November air quality had a median AQI of 31 (Good) over 210 monitored days in the Urban Honolulu, HI area. 0.0% of November days (0 of 210) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 74.3% of days. The cleanest November on record here was 2021 (median AQI 27, 0 days above 100) and the worst was 2022 (median 36, 0 days above 100, peak AQI 44).
- Good: 99.0%
- Moderate: 1.0%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Reduce Indoor Ozone in Honolulu
Today's main pollutant in Honolulu is ground-level ozone (AQI 28). Important: standard HEPA filters do NOT remove ozone — only a purifier with a substantial activated-carbon bed adsorbs it. The biggest wins are cutting indoor sources (gas appliances, certain "ionizer" purifiers) and ventilating when outdoor ozone is low (early morning). A high-carbon unit helps with the gases and VOCs that linger indoors.
Recommended: Levoit Core 300 — True HEPA + activated carbon · CADR ~141 CFM · rooms up to 219 sq ft
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How is the air in Honolulu in November?
Good on a typical day: median AQI 31 across 2019–2025, with 0.0% of November days above AQI 100. Ground-level ozone is the main driver.
- ✓99.0% of November days were Good (AQI 0–50), 1.0% Moderate (51–100).
- ✓0 days of 210 reached AQI 101+; the November peak was 52.
- ✓Best November: 2021; worst November: 2022.
Frequently asked questions
What is the air quality like in Honolulu in November?▾
Across 2019–2025, the median daily AQI in Honolulu in November was 31 (Good). 99.0% of days were Good, 1.0% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 210 monitored days in EPA's Air Quality System.
Is November a good time for outdoor exercise in Honolulu?▾
A typical November day in Honolulu sits in the Good range (median AQI 31), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of November days reached AQI 101+ in 2019–2025.
Which pollutant causes Honolulu's November air quality problems?▾
Ground-level ozone set the daily AQI on 74.3% of November days in Honolulu. The highest November AQI recorded in 2019–2025 was 52 (Moderate), in 2022.
Honolulu November air quality, year by year
Honolulu November air quality by year (Urban Honolulu, HI, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 31 | 0 | 42 | O3 |
| 2020 | 30 | 30 | 0 | 38 | O3 |
| 2021cleanest | 30 | 27 | 0 | 49 | O3 |
| 2022worst | 30 | 36 | 0 | 44 | O3 |
| 2023 | 30 | 32 | 0 | 52 | O3 |
| 2024 | 30 | 35 | 0 | 48 | O3 |
| 2025 | 30 | 31 | 0 | 51 | O3 |
What November air means in Honolulu
A typical November day in Honolulu sits in the Good range (median AQI 31), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of November days reached AQI 101+ in 2019–2025.
November's median AQI of 31 is in line with Honolulu's whole-year median of 29, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median November AQI across every EPA metro area (92,704 metro-days, 2019–2025) is 39, so Honolulu runs below the national November norm; 0.0% of its November days topped AQI 100 versus 0.6% nationally (about the same).
November is part of Honolulu's fall season (September, October, November); the fall page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Honolulu
The latest EPA AirNow observation puts Honolulu's AQI at 28 (O3). The figures above are multi-year month statistics, not today's reading.
View current Honolulu air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Urban Honolulu, HI), 2019–2025. Daily AQI per CBSA is the highest AQI reported by any monitor in the area that day; the defining parameter is the pollutant that set it. Month and season statistics pool every such day in the period across all years listed. Retrieved 2026-09-09.