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Air Quality History for San Juan, United States

Historical PM2.5 and AQI trend from monitoring stations near San Juan, United States.

34
Current AQI
Good Station
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

430h

PM2.5 Station

430h · 1 station

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg Hours Stations
2026-10-21 35 27–49 8.4 µg/m³ 4h 1
2026-10-20 29 14–40 6.9 µg/m³ 21h 2
2026-10-19 31 11–67 7.5 µg/m³ 23h 2
2026-10-18 27 2–106 7.0 µg/m³ 23h 1
2026-10-17 19 2–38 4.5 µg/m³ 22h 2
2026-10-16 38 14–97 10.2 µg/m³ 22h 2
2026-10-15 32 5–58 7.7 µg/m³ 19h 2
2026-10-14 37 15–111 9.8 µg/m³ 21h 2
2026-10-13 25 1–63 6.1 µg/m³ 20h 2
2026-10-12 28 9–51 6.8 µg/m³ 23h 2
2026-10-11 29 10–56 7.0 µg/m³ 21h 2
2026-10-10 36 8–63 8.8 µg/m³ 22h 2
2026-10-09 35 15–54 8.5 µg/m³ 23h 2
2026-10-08 38 16–82 9.7 µg/m³ 19h 2
2026-10-07 35 14–61 8.6 µg/m³ 24h 2
2026-10-06 29 14–50 7.0 µg/m³ 23h 2
2026-10-05 26 9–37 6.1 µg/m³ 23h 2
2026-10-04 25 11–39 6.1 µg/m³ 21h 2
2026-10-03 32 10–70 8.1 µg/m³ 21h 2
2026-10-02 27 8–85 7.0 µg/m³ 20h 1
2026-10-01 36 12–66 9.1 µg/m³ 15h 1
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