Today | Weather | Wednesday, May 20, 2026

Weather in Manchester, New Hampshire

04:53 PM
Now
Cloudy Weather
84° F
Feels Like 82°
Precipitation 14 %
Wind 16 mph
UV Index (0 - 11+) 3
Humidity 42 %
Today
Sunny with a Chance of Thunderstorms
Day 90°
Night 55°
Precipitation 40 %
Wind 16 mph
UV Index (0 - 11+) 7

Manchester Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (May 20, 2025)
Cloudy Weather

Day

59°

Night

48°

Wind

8 mph

UV Index

2

Precipitation

25 %

Air Quality in Manchester

NOW
39 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.89 µg/m³
PM10 3.03 µg/m³
O3 0.042 ppm
NO2 1.6 ppb
SO2 0.2 ppb
CO 0.12 ppm
NH3 0.25 µg/m³
NO 0.23 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)
PM2.52.89 µg/m³
PM103.03 µg/m³
O381.73 µg/m³
NO22.92 µg/m³
SO20.48 µg/m³
CO137.58 µg/m³
NH30.25 µg/m³
NO0.23 µg/m³