5-day weather forecast Boston 13-08-2026

Weather forecast Boston today 13.08.2026: sunny, temperature from 20 °C to 32 °C.

Precipitation probability 32%. Wind up to 3.81 m/s (gusts 5.72 m/s). Air humidity 38–83%, atmospheric pressure 756–759 mm Hg, UV index up to 5.9.

Sunrise 05:49
Sunset 19:48
New Moon2% illuminated
Moonrise 06:28 · Moonset 20:16
Chart
Table
Thu, Aug 13, 2026

Forecast from 20 °C to 32 °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)222121212020202122232427283030303132302825252422
Precipitation (mm/hr)000.190.0300.010.0400000000000000000

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 (%)0083810818926696363827292493020000
Rain chance (%)573223921261091566532211114322

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)1.8122.312.52.613.1933.113.693.693.692.612.52.693.112.611.312.693.812.6122.612.813
Wind gust (m/s)3.784.194.834.864.785.725.584.724.54.254.2532.893.113.783.641.813.55.084.114.115.085.365.64
Wind direction (°)W 263°W 266°WSW 244°WSW 246°WSW 246°SW 231°SW 230°SW 220°SW 230°WSW 238°WSW 243°W 272°W 276°WNW 282°WNW 295°NW 304°NW 324°NNW 333°NNW 347°NNW 332°NW 308°WNW 288°WNW 292°NW 309°

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 (%)697378818182838280777064574742403839444764604853

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)756756756756756757757757758758757757756756756756756756757757758758759759

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 Index00000000.20.81.93.44.85.75.93.11.411.10.50.10000

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)7.67.57.58.810.411.412.412.913.213.713.211.710.710.210.28.77.66.85.96.17.487.77.1
PM10 (µg/m³)7.87.77.7910.611.612.713.213.61413.5121110.410.48.87.86.96.16.27.58.17.77.1
Ozone (O₃) (µg/m³)57596268758183838798111121124123120116110101887158494339
NO₂ (µg/m³)16.915.513.811.79.37.88.29.6108.4643.12.72.62.11.93.27.613.517.919.72019.2
SO₂ (µg/m³)0.80.90.90.90.80.80.80.90.90.90.80.80.70.70.60.60.60.60.60.70.70.70.70.7
CO (µg/m³)226213201196193191191193190179163152150152153148142141149163171170164159
Thu, Aug 13, 2026

Frequently asked questions about the 5-day weather in Boston

Over the next 5 days in Boston the temperature is expected to range from about 15 to 32 °C. See the detailed hourly forecast for each of the 5 days in the charts above.

The chance of rain in Boston over the next 5 days reaches 78%. Check the 5-day precipitation chart above to see exactly which days and hours bring rain.

A 5-day forecast is fairly reliable: the first 2–3 days are usually very accurate, while days 4–5 may be refined. The data is updated several times a day, so check back before important plans.

Over the next 5 days the temperature in Boston ranges from about 15 to 32 °C. Compare the warmest and coolest day on the temperature chart above.

Over the next 5 days the wind in Boston picks up to 6 m/s. The windiest days are easy to spot on the wind chart above.

For a walk or a trip, pick the days with the lowest chance of rain (up to 78%) and light wind — easy to compare on the 5-day charts above.

The first 2–3 days are reliable enough for firm decisions, while days 4–5 are a guide that sharpens as they approach. The forecast is updated several times a day, so check again before important plans.

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.