Stockton Air Quality in Summer
Across 2019–2025, Stockton's summer (June–August) air quality had a median AQI of 48 (Good) over 644 monitored days in the Stockton-Lodi, CA area. 3.2% of summer days (21 of 644) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 61.0% of days. The cleanest summer on record here was 2022 (median AQI 44, 0 days above 100) and the worst was 2020 (median 49, 9 days above 100, peak AQI 194).
- Good: 56.2%
- Moderate: 40.5%
- Unhealthy for Sensitive Groups: 2.3%
- Unhealthy or worse: 0.9%
Extra Protection for Stockton Homes
Air quality in Stockton is moderate (AQI 60), with particle pollution the main concern. A True-HEPA purifier gives sensitive groups — kids, seniors and anyone with asthma or allergies — cleaner air indoors on days like today.
Recommended: Coway AP-1512HH Mighty — True HEPA + carbon · CADR ~246 CFM · rooms up to 361 sq ft
As an Amazon Associate, we earn from qualifying purchases.
How is the air in Stockton in summer?
Good on a typical day: median AQI 48 across 2019–2025, with 3.2% of summer days above AQI 100. Ground-level ozone is the main driver.
- ✓56.2% of summer days were Good (AQI 0–50), 40.5% Moderate (51–100).
- ✓21 days of 644 reached AQI 101+; the summer peak was 194.
- ✓Cleanest month: July; worst month: August.
Frequently asked questions
What is the air quality like in Stockton in summer?▾
Across 2019–2025, the median daily AQI in Stockton in summer was 48 (Good). 56.2% of days were Good, 40.5% Moderate, and 3.2% reached Unhealthy for Sensitive Groups or worse, based on 644 monitored days in EPA's Air Quality System.
Is summer a good time for outdoor exercise in Stockton?▾
A typical summer day in Stockton sits in the Good range (median AQI 48), so running, cycling and children's outdoor play are fine for everyone on most days; about 1 day in 31 of summer days (3.2%) reached AQI 101+ in 2019–2025.
Which pollutant causes Stockton's summer air quality problems?▾
Ground-level ozone set the daily AQI on 61.0% of summer days in Stockton. The highest summer AQI recorded in 2019–2025 was 194 (Unhealthy), in 2020.
Stockton summer air quality, year by year
Stockton summer air quality by year (Stockton-Lodi, CA, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 92 | 47 | 3 | 129 | O3 |
| 2020worst | 92 | 49 | 9 | 194 | O3 |
| 2021 | 92 | 55 | 7 | 153 | O3 |
| 2022cleanest | 92 | 44 | 0 | 100 | O3 |
| 2023 | 92 | 47 | 0 | 99 | O3 |
| 2024 | 92 | 55 | 2 | 122 | O3 |
| 2025 | 92 | 44 | 0 | 80 | O3 |
What summer air means in Stockton
A typical summer day in Stockton sits in the Good range (median AQI 48), so running, cycling and children's outdoor play are fine for everyone on most days; about 1 day in 31 of summer days (3.2%) reached AQI 101+ in 2019–2025.
Summer's median AQI of 48 is in line with Stockton's whole-year median of 48, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median Summer AQI across every EPA metro area (308,645 metro-days, 2019–2025) is 46, so Stockton runs in line with the national Summer norm; 3.2% of its Summer days topped AQI 100 versus 3.6% nationally (about the same).
Within the season, July is the cleanest month (median AQI 48, 0.9% of days above 100) and August the worst (median 52, 7.4% above 100).
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Stockton
The latest EPA AirNow observation puts Stockton's AQI at 60 (PM10). The figures above are multi-year season statistics, not today's reading.
View current Stockton air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Stockton-Lodi, CA), 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.