5-day weather forecast Boston Sep 22, 2026

15°13° · Overcast

Weather forecast Boston Tuesday Sep 22, 2026: overcast, temperature from 13 °C to 15 °C.

Precipitation probability 20%. Wind up to 6.31 m/s (gusts 9.39 m/s). Air humidity 56–71%, atmospheric pressure 768–773 mm Hg, UV index up to 2.5.

Sunrise 06:31
Sunset 18:42
Waxing Gibbous89% illuminated
Moonrise 17:04 · Moonset 02:21
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Table

Forecast from 13 °C to 15 °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)151515141414141414141515141515151414131314141414
Precipitation (mm/hr)00000.010.010.0100000000000000000

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 (%)5899100100100100100100100100100100100100100100100100100100100100100100
Rain chance (%)111718192020191817161514141313131415151414141413

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)3.894.54.694.114.114.194.615.815.615.6966.1166.196.315.8955.614.894.895.115.315.396.11
Wind gust (m/s)7.427.727.7576.536.927.037.57.227.337.428.317.427.617.817.226.617.617.117.2288.698.819.39
Wind direction (°)ENE 60°NE 53°NE 50°NE 51°NE 38°NE 37°NE 49°ENE 60°ENE 58°NE 56°NE 50°NE 54°NE 55°ENE 57°ENE 57°NE 54°ENE 57°ENE 60°ENE 64°ENE 69°ENE 66°ENE 67°ENE 65°ENE 62°

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 (%)706769717171707066636160585656565960606058565656

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)768769769769770770770770770771772772773773772773773773773773773773773773

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 Index000000000.20.61.52.51.51.72.521.40.50.100000

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)12.510.67.95.65.24.94.85.15.24.84.64.64.64.54.54.54.44.34.44.85.35.76.16.4
PM10 (µg/m³)13.311.48.76.677.17.17.37.46.86.66.66.76.76.76.66.66.36.46.87.37.78.38.9
Ozone (O₃) (µg/m³)172939465154545352535557596264656563595349484748
NO₂ (µg/m³)4733.521.814.38.54.94.76.88.17.56.254.23.63.2333.85.98.810.911.711.811.3
SO₂ (µg/m³)1.51.31.210.70.50.40.50.50.50.50.50.50.60.60.60.60.60.60.70.70.80.80.9
CO (µg/m³)152151148140131127134147155153146140138136137141146150149146161.5179.5196.5212

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.