5-day weather forecast Boston 17-08-2026

Weather forecast Boston Monday, August 17 17.08.2026: patchy rain possible, temperature from 18 °C to 28 °C.

Precipitation probability 73%. Wind up to 3.89 m/s (gusts 6.72 m/s). Air humidity 55–99%, atmospheric pressure 756–759 mm Hg, UV index up to 6.8.

Sunrise 05:53
Sunset 19:42
Waxing Crescent27% illuminated
Moonrise 11:35 · Moonset 21:51
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Table

Forecast from 18 °C to 28 °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)181819191919192020202021242627282624232222222221
Precipitation (mm/hr)0.360.530.540.290.260.470.110.020.170.10.050.020.0100.020.020.020.040.050.010.03000

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 (%)1001001001001001001001001009689789183931006278718581432120
Rain chance (%)6467736160715445484940261812131410192123251587

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)3.53.192.391.691.391.391.391.51.391.191.391.692.3922.191.811.312.112.111.310.610.53.113.89
Wind gust (m/s)5.174.753.582.532.142.142.142.221.971.671.892.172.752.312.532.171.753.393.472.221.080.975.426.72
Wind direction (°)SSE 161°SSE 151°SE 131°E 95°NE 53°NE 36°NE 54°ENE 74°ENE 62°NNE 23°N 353°NNW 345°NNW 332°NNW 331°NW 326°NNW 336°NE 50°E 87°E 99°ESE 110°E 96°NW 312°NNW 332°NNW 331°

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 (%)979898999999999897969589726257556175808385847469

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)758758757756756756756757757757757757757756756756756756757757758758758759

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 Index000000000.20.61.12.86.56.86.23.91.60.40.100000

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.