5-day weather forecast Boston 05-09-2026

Weather forecast Boston Saturday, September 5 05.09.2026: sunny, temperature from 16 °C to 21 °C.

Precipitation probability 18%. Wind up to 7.11 m/s (gusts 9.92 m/s). Air humidity 60–76%, atmospheric pressure 756–761 mm Hg, UV index up to 3.4.

Sunrise 06:13
Sunset 19:12
Waning Crescent29% illuminated
Moonrise does not rise today · Moonset 15:30
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Table

Forecast from 16 °C to 21 °C and precipitation

Temperature & Precipitation
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Temperature (°C)212019181817171718181819192019191918181817171616
Precipitation (mm/hr)000000000.0100.010.010.040.030.030.0200000000

Cloud cover and precipitation probability

Cloud cover & Rain chance
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Cloud cover (%)79679000047794908076587180249393431000
Rain chance (%)12945567816181816171215167161796778

Wind speed and direction

Wind & Wind gust
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Wind (m/s)3.894.1143.8943.894.1144.54.54.55.316.397.117.116.815.695.5431.811.52.312.61
Wind gust (m/s)9.839.539.319.229.228.728.728.729.319.399.198.839.819.729.929.899.228.839.616.813.192.033.925.81
Wind direction (°)NW 324°NW 322°NW 320°NW 318°NW 322°NNW 327°NNW 334°NNW 348°N 2°N 10°N 10°NNE 21°NE 34°NE 43°NE 40°NE 45°NE 54°NE 49°NE 48°NE 51°NNE 20°NW 323°WNW 301°NW 319°

Air humidity

Humidity
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Humidity (%)636062666971747572717170726870706768696871747576

Atmospheric pressure

Pressure
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Pressure (mm Hg)756756756756756756756757758758758758758758759759759760760761761761761761

Ultraviolet index

UV Index
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
UV Index00000000.10.71.83.23.43.42.41.81.10.80.70.200000

Air quality & pollen

Air quality
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
PM2.5 (µg/m³)6.55.654.64.244.14.65.14.12.81.81.61.41.41.61.92.53.14.25.46.46.66.1
PM10 (µg/m³)6.55.65.14.64.24.14.14.65.14.33.121.81.71.71.92.43.13.95.26.47.47.57
Ozone (O₃) (µg/m³)424751535454524949556471757779808179756862565147
NO₂ (µg/m³)18.113.710.598.68.810.212.312.910.56.53.52.52.42.52.32.33.25.7911.813.815.215.6
SO₂ (µg/m³)0.60.60.70.811.11.31.51.51.310.70.60.50.40.30.30.30.30.40.50.60.70.7
CO (µg/m³)176163153147144145155168173159136119115116119122126132141152160161159156

Boston on the map

Data Sources & Methodology

Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.