Laredo Air Quality in Winter
Across 2019–2025, Laredo's winter (December–February) air quality had a median AQI of 42 (Good) over 632 monitored days in the Laredo, TX area. 0.0% of winter days (0 of 632) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 65.3% of days. The cleanest winter on record here was 2023 (median AQI 40, 0 days above 100) and the worst was 2021 (median 46, 0 days above 100, peak AQI 78).
- Good: 70.1%
- Moderate: 29.9%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Reduce Indoor Ozone in Laredo
Today's main pollutant in Laredo is ground-level ozone (AQI 13). 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.
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How is the air in Laredo in winter?
Good on a typical day: median AQI 42 across 2019–2025, with 0.0% of winter days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓70.1% of winter days were Good (AQI 0–50), 29.9% Moderate (51–100).
- ✓0 days of 632 reached AQI 101+; the winter peak was 96.
- ✓Cleanest month: January; worst month: February.
Frequently asked questions
What is the air quality like in Laredo in winter?▾
Across 2019–2025, the median daily AQI in Laredo in winter was 42 (Good). 70.1% of days were Good, 29.9% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 632 monitored days in EPA's Air Quality System.
Is winter a good time for outdoor exercise in Laredo?▾
A typical winter 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 winter days reached AQI 101+ in 2019–2025.
Which pollutant causes Laredo's winter air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 65.3% of winter days in Laredo. The highest winter AQI recorded in 2019–2025 was 96 (Moderate), in 2021.
Laredo winter air quality, year by year
Laredo winter air quality by year (Laredo, TX, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 90 | 43 | 0 | 96 | PM2.5 |
| 2020 | 91 | 41 | 0 | 75 | PM2.5 |
| 2021worst | 90 | 46 | 0 | 78 | PM2.5 |
| 2022 | 90 | 42 | 0 | 66 | PM2.5 |
| 2023cleanest | 90 | 40 | 0 | 86 | O3 |
| 2024 | 91 | 40 | 0 | 84 | O3 |
| 2025 | 90 | 43 | 0 | 68 | PM2.5 |
What winter air means in Laredo
A typical winter 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 winter days reached AQI 101+ in 2019–2025.
Winter'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 Winter AQI across every EPA metro area (278,620 metro-days, 2019–2025) is 40, so Laredo runs in line with the national Winter norm; 0.0% of its Winter days topped AQI 100 versus 0.6% nationally (about the same).
Within the season, January is the cleanest month (median AQI 39, 0.0% of days above 100) and February the worst (median 44, 0.0% above 100).
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 season 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.