Riverside Air Quality in February
Across 2019–2025, Riverside's February air quality had a median AQI of 61 (Moderate) over 198 monitored days in the Riverside-San Bernardino-Ontario, CA area. 7.1% of February days (14 of 198) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 76.3% of days. The cleanest February on record here was 2024 (median AQI 58, 0 days above 100) and the worst was 2025 (median 64, 3 days above 100, peak AQI 164).
- Good: 18.2%
- Moderate: 74.7%
- Unhealthy for Sensitive Groups: 5.1%
- Unhealthy or worse: 2.0%
Extra Protection for Riverside Homes
Air quality in Riverside is moderate (AQI 56), with fine particles (PM2.5) 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
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How is the air in Riverside in February?
Moderate on a typical day: median AQI 61 across 2019–2025, with 7.1% of February days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓18.2% of February days were Good (AQI 0–50), 74.7% Moderate (51–100).
- ✓14 days of 198 reached AQI 101+; the February peak was 409.
- ✓Best February: 2024; worst February: 2025.
Frequently asked questions
What is the air quality like in Riverside in February?▾
Across 2019–2025, the median daily AQI in Riverside in February was 61 (Moderate). 18.2% of days were Good, 74.7% Moderate, and 7.1% reached Unhealthy for Sensitive Groups or worse, based on 198 monitored days in EPA's Air Quality System.
Is February a good time for outdoor exercise in Riverside?▾
A typical February day in Riverside is Moderate (median AQI 61): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 14 of February days (7.1%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Riverside's February air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 76.3% of February days in Riverside. The highest February AQI recorded in 2019–2025 was 409 (Hazardous), in 2025.
Riverside February air quality, year by year
Riverside February air quality by year (Riverside-San Bernardino-Ontario, CA, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 28 | 58 | 1 | 118 | PM2.5 |
| 2020 | 29 | 69 | 2 | 105 | PM2.5 |
| 2021 | 28 | 71 | 2 | 120 | PM2.5 |
| 2022 | 28 | 63 | 3 | 409 | PM2.5 |
| 2023 | 28 | 55 | 3 | 177 | PM2.5 |
| 2024cleanest | 29 | 58 | 0 | 94 | PM2.5 |
| 2025worst | 28 | 64 | 3 | 164 | PM2.5 |
What February air means in Riverside
A typical February day in Riverside is Moderate (median AQI 61): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 14 of February days (7.1%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
February's median AQI of 61 is below Riverside's whole-year median of 89, making it one of the area's cleaner periods. Nationally, the median February AQI across every EPA metro area (87,428 metro-days, 2019–2025) is 41, so Riverside runs above the national February norm; 7.1% of its February days topped AQI 100 versus 0.4% nationally (above average).
February is part of Riverside's winter season (December, January, February); the winter page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Riverside
The latest EPA AirNow observation puts Riverside's AQI at 56 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Riverside air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Riverside-San Bernardino-Ontario, 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.