Map of Boston in United States of America

Boston Climate

Boston is a non-capital city in United States of America, North America. The name of the state it is in is called Massachusetts.

Best time to visit Boston

The best time to visit Boston will be when the average temperatures are at a comfortable level (between 20°C / 68.0°F and 30°C / 86.0°F on average) which is during months July and August. Other great months to visit Boston are May, June, September and October when the average temperatures are a little cooler but still between a pleasant 10°C / 50.0°F and 20°C / 68.0°F. If you don't mind bringing a coat, you might also enjoy visiting Boston during March, April, November and December but average temperatures are fairly cool (between 0°C / 32.0°F and 10°C / 50.0°F).

Boston can become a little chilly in other months of the year with temperatures sub zero °C / 32.0°F. If you don't mind the cold, then visit during January and December. But don't forget to pack your thermals!


The warmest time of year in Boston is in July when it is 23.05°C / 73.5°F on average, but could get up to 27.7°C / 81.9°F maximum. On the other hand, the coldest time of year in Boston is in January when it is -1.85°C / 28.7°F on average, but could get down to -5.8°C / 28.7°F minimum.

  • Freezing months: 2 (0°C / 32.0°F and below)
  • Cold months: 4 (0°C / 32.0°F to 10°C / 50.0°F)
  • Cool months: 4 (10°C / 50.0°F to 20°C / 68.0°F)
  • Warm months: 2 (20°C / 68.0°F to 30°C / 86.0°F)
  • Hot months: 0 (30°C / 86.0°F to 40°C / 104.0°F)
  • Boiling months: 0 (40°C / 104.0°F and above)

Boston Climate Chart

Below are the climate charts for Boston in Massachusetts which resides in United States of America.

Temperature tables

The first table is for the average temperatures across the year in degrees Celsius. The cells that are BLUE show the coldest months and the cells that are PINK show the hottest months.

Month:JanFebMarAprMayJunJulAugSepOctNovDec
Average Temperature in °C-1.85-0.953.658.9514.5519.8523.0522.218.2512.77.350.9
Max Temperature in °C2.13.17.713.319.224.627.726.622.717.111.24.7
Min Temperature in °C-5.8-5-0.44.69.915.118.417.813.88.33.5-2.9

This second table is for the average temperatures across the year in degrees Fahrenheit. Cells in BLUE are the coldest months and cells in PINK are the hottest months.

Month:JanFebMarAprMayJunJulAugSepOctNovDec
Average Temperature in °F28.730.338.648.158.267.773.572.064.954.945.233.6
Max Temperature in °F35.837.645.955.966.676.381.979.972.962.852.240.5
Min Temperature in °F21.623.031.340.349.859.265.164.056.846.938.326.8

Rainfall figures

This table is for the amount of rainfall (both in millimetres and inches) and number of rainy days in Boston throughout the year.

Month:JanFebMarAprMayJunJulAugSepOctNovDec
Total rainfall in MM91.291.993.791.482.678.572.182.377.783.8107.2101.9
Total rainfall in Inches3.63.63.73.63.33.12.83.23.13.34.24.0
Total number of rainy days97.69.18.68.98.37.27.86.76.98.99.7
Chances of rain29.0%27.1%29.4%28.7%28.7%27.7%23.2%25.2%22.3%22.3%29.7%31.3%

Boston Climate Graph

Below is the climate graph for Boston. It shows both the average temperatures throughout the year in degrees Celsius and also the average total rainfall in millimetres.

Boston Climate Graph with temperatures in °C and rainfall in millimetres

Below is the climate graph for Boston with both the average temperatures throughout the year in degrees Fahrenheit and also the average total rainfall in inches.

Boston Climate Graph with temperatures in °F and rainfall in inches