Climate Insights for Boston

The climate in Boston is temperate. The average annual temperature is 11°C and approximately 1097mm of precipitation falls per year. Boston receives a notable amount of rainfall throughout the year, including during its driest month. Boston is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: Luglio, Agosto, Giugno. The coldest months are Gennaio, Febbraio, Dicembre, when temperatures can drop to -4°C. Snowfall occurs from January to December, with around 97cm accumulating over the season.

Temperatures in Boston vary considerably across the year, with a 33°C difference between the coldest and warmest months. The warmest month is Luglio, when average highs reach 29°C and the mean temperature sits around 24°C. The coldest month is Gennaio, when overnight lows fall to -4°C and the daily average is -1°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 6°C shift in average temperatures.

Boston is a moderately rainy area, receiving approximately 1097mm of precipitation annually, which averages out to around 91mm per month. The wettest month is December, averaging 116mm of rainfall. July and October also tend to see above-average precipitation. The driest month is May, with just 74mm. That's 41mm less than December, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Snowfall is a regular feature from January to December, with around 97cm accumulating over the season. February typically sees the most snow at around 29cm.

Boston is mildly breezy, with an average annual wind speed of 17km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 20km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 14km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 6km/h between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 19km/h in winter, 18km/h in spring, 15km/h in summer, 17km/h in autumn.

It is currently winter in Boston, which began on December 21, 2026. Boston is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in Luglio at around 29°C, while the coldest stretch bottoms out in Gennaio near -4°C. Spring is next, beginning on March 20, 2026 — 1 days from now.

The best time to visit Boston is during Maggio, Giugno, Agosto and Settembre, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 80mm per month. By contrast, Luglio can be uncomfortably hot with highs reaching 29°C, while Gennaio is the coldest period with lows dropping to -4°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Boston based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.