Today | Weather | Wednesday, March 18, 2026

Weather in Manchester, New Hampshire

06:44 AM
Now
Sunny Weather
25° F
Feels Like 12°
Precipitation 0 %
Wind 10 mph
UV Index (0 - 11+) 0
Humidity 42 %
Today
Cloudy Weather
Day 36°
Night 21°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 4
Overnight Frost 5 AM – 5 AM
Tomorrow Morning Frost 2 AM – 7 AM

Manchester Weather Forecast Updated

37 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (March 18, 2025)
Cloudy Weather

Day

55°

Night

30°

Wind

8 mph

UV Index

3

Precipitation

0 %

Air Quality in Manchester

NOW
44 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.53 µg/m³
PM10 0.94 µg/m³
O3 0.048 ppm
NO2 1.6 ppb
SO2 0.3 ppb
CO 0.15 ppm
NH3 0.23 µg/m³
NO 0 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)
PM2.50.53 µg/m³
PM100.94 µg/m³
O393.32 µg/m³
NO22.97 µg/m³
SO20.77 µg/m³
CO166.14 µg/m³
NH30.23 µg/m³
NO0 µg/m³