What is the air quality in Portsmouth today?

The current Air Quality Index (AQI) in Portsmouth is 25 (Good). PM2.5 concentration is 5.9 µg/m³.

What is the temperature in Portsmouth right now?

The current temperature in Portsmouth is 18.5°C (feels like 18.5°C). Humidity is 36.3% and wind speed is 33.7 km/h.

Is it safe to go outside in Portsmouth?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0 (Low).

Air Quality in Portsmouth, United States

Clear

18.5°C · 36.3% humidity

18.5°

Feels 18.5°

Good

Air quality is satisfactory. Enjoy outdoor activities.

Model forecast

Nearby Monitoring Stations

AQI Forecast

25 5pm

25 8pm

25 11pm

37 2am

37 5am

37 8am

37 11am

25 2pm

36.3%

Humidity

33.7 km/h

Wind SW

1027.7 hPa

Pressure

0.7

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

What is the weather forecast for Portsmouth?

Temperature & Precipitation

PM2.55.9 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.7

Low

What is the 7-day forecast for Portsmouth?

04-09

18.5° 3.6°

04-10

20.6° 7.3°

04-11

19.2° 10.3°

04-12

25.9° 13.5°

04-13

26.0° 14.9°

04-14

25.7° 17.8°

0.38 mm

04-15

21.4° 12.7°

24.88 mm

Both models agree Avg diff: 4.8°C

What cities are near Portsmouth?

25 Ashland 25 Meads 25 Huntington 25 Chillicothe 47 Lancaster 55 Grove City 52 Pickerington 42 Lebanon 48 Fort Thomas 35 Winchester

Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-04-09T20:32 UTC.