Today | Weather | Friday, September 18, 2026

Weather in Manchester, New Hampshire

09:36 AM
Now
Cloudy Weather
73° F
Feels Like 72°
Precipitation 0 %
Wind 15 mph
UV Index (0 - 11+) 3
Humidity 65 %
Today
Cloudy Weather
Day 79°
Night 46°
Precipitation 0 %
Wind 14 mph
UV Index (0 - 11+) 5

Manchester Weather Forecast Updated

5 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 18, 2025)
Night

Day

82°

Night

57°

Wind

5 mph

Precipitation

3 %

Air Quality in Manchester

NOW
37 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 8.89 µg/m³
PM10 9.39 µg/m³
O3 0.023 ppm
NO2 2.2 ppb
SO2 0.2 ppb
CO 0.20 ppm
NH3 0.14 µg/m³
NO 1.15 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.58.89 µg/m³
PM109.39 µg/m³
O344.79 µg/m³
NO24.08 µg/m³
SO20.57 µg/m³
CO229.48 µg/m³
NH30.14 µg/m³
NO1.15 µg/m³