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  4. Rockingham County
  5. Portsmouth

Portsmouth

Portsmouth, New Hampshire

2026-02-18 12:00
AQI (US)
Moderate
Pollutants|Pollens
PM2.5
μg/m³
22
PM10
μg/m³
30
O3
μg/m³
23.6
SO2
μg/m³
2.3
Weather
  • ℃
  • ℉
1℃
90%
15 kph
1 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • Pollen
  • PM2.5
  • PM10
  • O3
  • SO2
Data Sources
http://www.airnow.gov/

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