The warmest month in Boston is July, with an average high of 28.7°C and an average low of 19.2°C. The coldest month is January, with an average high of 3°C and an average low of -5°C. Between 2016 and 2025, the highest temperature recorded was 38.8°C (June 24, 2025) and the lowest was -26.4°C (February 14, 2016).
| Month | Avg. high | Avg. low | Precipitation |
|---|---|---|---|
| January | 3°C | -5°C | 99 mm |
| February | 4.9°C | -4.7°C | 87 mm |
| March | 8.3°C | -1.2°C | 110 mm |
| April | 13.3°C | 3.9°C | 109 mm |
| May | 19.3°C | 9.8°C | 94 mm |
| June | 25.1°C | 15.3°C | 79 mm |
| July | 28.7°C | 19.2°C | 115 mm |
| August | 27.6°C | 18.4°C | 76 mm |
| September | 23.2°C | 14.8°C | 108 mm |
| October | 17.5°C | 9.1°C | 121 mm |
| November | 10.6°C | 2.1°C | 83 mm |
| December | 5°C | -2.9°C | 115 mm |
Based on daily historical weather data 2016–2025. Weather data by Open-Meteo.com.
Explore detailed temperature patterns in Boston, United States through interactive candlestick charts. View historical weather data with daily temperature ranges, trends, and variations. Whether you're planning a trip to Boston or analyzing local climate patterns, our unique visualization makes temperature data easy to understand. Get insights into Boston's weather patterns from hourly updates to yearly historical data.