5-day weather forecast Boston 15-08-2026

Weather forecast Boston tomorrow 15.08.2026: sunny, temperature from 15 °C to 26 °C.

Precipitation probability 5%. Wind up to 3.89 m/s (gusts 6.39 m/s). Air humidity 32–65%, atmospheric pressure 765–767 mm Hg, UV index up to 7.1.

Sunrise 05:51
Sunset 19:45
Waxing Crescent11% illuminated
Moonrise 09:06 · Moonset 21:03
Chart
Table

Forecast from 15 °C to 26 °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)201817171615151619212324252526252525242220191818
Precipitation (mm/hr)000000000000000000000000

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 (%)002233332000037788910910117
Rain chance (%)223344542111111111123344

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)3.892.51.811.811.611.691.892.3133.53.312.612.312.312.612.813.1133.193.3132.892.892.69
Wind gust (m/s)6.394.393.363.423.063.223.643.533.614.033.8132.642.6433.223.583.4444.755.195.395.445.06
Wind direction (°)N 358°N 11°NNW 327°NNW 329°NW 313°NW 313°NW 314°NW 319°NNW 336°NNW 348°N 355°N 9°NNE 28°NE 54°ENE 66°ENE 78°E 84°E 97°ESE 115°SE 135°SSE 157°S 170°S 186°SSW 202°

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 (%)495458606163656151423734323232333436404754576064

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)765765765765765765766766767767766766766766766766766765765766766766766766

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 Index00000000.312.44.15.86.97.16.553.21.60.60.10000

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)44.44.74.84.84.74.755.34.93.63.13.23.23.43.63.94.34.65.37.69.29.39.4
PM10 (µg/m³)4.14.54.84.94.94.84.95.25.553.73.23.23.33.43.744.44.75.47.79.39.49.5
Ozone (O₃) (µg/m³)6361595652494746495769798691961011061061008978685749
NO₂ (µg/m³)7.77.67.788.58.899.18.56.84.42.61.91.921.81.73.1712.417.120.623.324.7
SO₂ (µg/m³)1.11.11.21.31.31.41.51.61.61.41.10.90.80.80.80.80.90.9111.11.11.11.1
CO (µg/m³)154135124123129138150165171163147133125120117118121127138151160162159156

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.