Billings Air Quality in February
Across 2019–2025, Billings's February air quality had a median AQI of 30 (Good) over 180 monitored days in the Billings, MT area. 0.0% of February days (0 of 180) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 81.7% of days. The cleanest February on record here was 2023 (median AQI 21, 0 days above 100) and the worst was 2025 (median 41, 0 days above 100, peak AQI 77).
- Good: 89.4%
- Moderate: 10.6%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
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How is the air in Billings in February?
Good on a typical day: median AQI 30 across 2019–2025, with 0.0% of February days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓89.4% of February days were Good (AQI 0–50), 10.6% Moderate (51–100).
- ✓0 days of 180 reached AQI 101+; the February peak was 77.
- ✓Best February: 2023; worst February: 2025.
Frequently asked questions
What is the air quality like in Billings in February?▾
Across 2019–2025, the median daily AQI in Billings in February was 30 (Good). 89.4% of days were Good, 10.6% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 180 monitored days in EPA's Air Quality System.
Is February a good time for outdoor exercise in Billings?▾
A typical February day in Billings sits in the Good range (median AQI 30), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of February days reached AQI 101+ in 2019–2025.
Which pollutant causes Billings's February air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 81.7% of February days in Billings. The highest February AQI recorded in 2019–2025 was 77 (Moderate), in 2025.
Billings February air quality, year by year
Billings February air quality by year (Billings, MT, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 10 | 29 | 0 | 49 | PM2.5 |
| 2020 | 29 | 27 | 0 | 53 | PM2.5 |
| 2021 | 28 | 32 | 0 | 67 | PM2.5 |
| 2022 | 28 | 29 | 0 | 67 | PM2.5 |
| 2023cleanest | 28 | 21 | 0 | 53 | PM2.5 |
| 2024 | 29 | 34 | 0 | 44 | O3 |
| 2025worst | 28 | 41 | 0 | 77 | PM2.5 |
What February air means in Billings
A typical February day in Billings sits in the Good range (median AQI 30), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of February days reached AQI 101+ in 2019–2025.
February's median AQI of 30 is below Billings's whole-year median of 38, 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 Billings runs below the national February norm; 0.0% of its February days topped AQI 100 versus 0.4% nationally (about the same).
February is part of Billings's winter season (December, January, February); the winter page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Billings
The latest EPA AirNow observation puts Billings's AQI at 21 (O3). The figures above are multi-year month statistics, not today's reading.
View current Billings air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Billings, MT), 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.