Laredo Air Quality in December
Across 2019–2025, Laredo's December air quality had a median AQI of 42 (Good) over 217 monitored days in the Laredo, TX area. 0.0% of December days (0 of 217) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 66.4% of days. The cleanest December on record here was 2022 (median AQI 35, 0 days above 100) and the worst was 2021 (median 51, 0 days above 100, peak AQI 75).
- Good: 67.7%
- Moderate: 32.3%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Reduce Indoor Ozone in Laredo
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How is the air in Laredo in December?
Good on a typical day: median AQI 42 across 2019–2025, with 0.0% of December days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓67.7% of December days were Good (AQI 0–50), 32.3% Moderate (51–100).
- ✓0 days of 217 reached AQI 101+; the December peak was 76.
- ✓Best December: 2022; worst December: 2021.
Frequently asked questions
What is the air quality like in Laredo in December?▾
Across 2019–2025, the median daily AQI in Laredo in December was 42 (Good). 67.7% of days were Good, 32.3% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 217 monitored days in EPA's Air Quality System.
Is December a good time for outdoor exercise in Laredo?▾
A typical December day in Laredo sits in the Good range (median AQI 42), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of December days reached AQI 101+ in 2019–2025.
Which pollutant causes Laredo's December air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 66.4% of December days in Laredo. The highest December AQI recorded in 2019–2025 was 76 (Moderate), in 2021.
Laredo December air quality, year by year
Laredo December air quality by year (Laredo, TX, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 31 | 43 | 0 | 76 | PM2.5 |
| 2020 | 31 | 43 | 0 | 65 | PM2.5 |
| 2021worst | 31 | 51 | 0 | 75 | PM2.5 |
| 2022cleanest | 31 | 35 | 0 | 66 | PM2.5 |
| 2023 | 31 | 37 | 0 | 65 | O3 |
| 2024 | 31 | 35 | 0 | 54 | O3 |
| 2025 | 31 | 50 | 0 | 66 | PM2.5 |
What December air means in Laredo
A typical December day in Laredo sits in the Good range (median AQI 42), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of December days reached AQI 101+ in 2019–2025.
December's median AQI of 42 is below Laredo's whole-year median of 47, making it one of the area's cleaner periods. Nationally, the median December AQI across every EPA metro area (95,590 metro-days, 2019–2025) is 39, so Laredo runs in line with the national December norm; 0.0% of its December days topped AQI 100 versus 0.7% nationally (about the same).
December is part of Laredo's winter season (December, January, February); the winter page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Laredo
The latest EPA AirNow observation puts Laredo's AQI at 13 (O3). The figures above are multi-year month statistics, not today's reading.
View current Laredo air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Laredo, TX), 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.