Our verdict
The best time to visit Boston is April
The very hottest temperatures in Boston get to around 30℃ (86℉) in the height of summer. In the winter, temperatures can get down to -9℃ (16℉) around January.
If you’re keen to work on your tan in Boston, you’re most likely get the longest days between sun-up and sun-down around August. On average it rains the most days in December, making it the wettest month of the year. Although it’s the wet season, it can often rain a little bit during the day or evening but have fine weather for a majority of the day too, so don’t let this put you off.
Keep reading to find all the info you need (and none of the stuff you don’t) about the best times to go to Boston. By the time you get to the bottom, you’ll be ready to start booking your trip.
Quick links: Fast facts / Seasons / Average temperatures / Monthly climate / FAQs / Map
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Boston seasons
Before you continue, it’s important to know when the seasons are in Boston as they might be different to yours depending on where in the world you’re travelling from. Boston is in the Northern Hemisphere, so the seasons fall during these months:
| Season | Months |
|---|---|
| Summer | June to August |
| Autumn/fall | September to November |
| Winter | December to February |
| Spring | March to May |
Average temperatures in Boston
If the temperature is a big factor for you to help you decide when to visit, the chart below shows the average minimum and maximum temperatures in Boston for each month side-by-side so you can easily see the difference in weather throughout the year. To see the temperatures in both Celsius (°C) and Fahrenheit (°F), hover or tap the shaded boxes on the graph.
Boston climate by month
If you already have a rough idea about which months you might want to travel, the section below shows a detailed breakdown of the climate in Boston for each month so you can see if it all suits your wants and needs. Scroll down, or use the quick menu below to jump to your preferred month.
Jump to:
Boston in January
- Average temperature: -2℃ (29℉)
- Average high temperature: 1℃ (34℉)
- Average low temperature: -5℃ (23℉)
- Average humidity: 76%
- Average sunny days: 18 days
- Average rainfall: 58mm (2") over 8 days
- Average snow days: 8 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Boston in January, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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Boston in February
- Average temperature: -1℃ (31℉)
- Average high temperature: 3℃ (37℉)
- Average low temperature: -5℃ (24℉)
- Average humidity: 77%
- Average sunny days: 14 days
- Average rainfall: 57mm (2") over 8 days
- Average snow days: 8 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Boston in February, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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Boston in March
- Average temperature: 3℃ (37℉)
- Average high temperature: 6℃ (43℉)
- Average low temperature: -1℃ (31℉)
- Average humidity: 73%
- Average sunny days: 15 days
- Average rainfall: 74mm (3") over 12 days
- Average snow days: 7 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Boston in March, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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Boston in April
- Average temperature: 9℃ (48℉)
- Average high temperature: 13℃ (55℉)
- Average low temperature: 5℃ (40℉)
- Average humidity: 69%
- Average sunny days: 13 days
- Average rainfall: 74mm (3") over 15 days
- Average snow days: 1 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Boston in April, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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Boston in May
- Average temperature: 15℃ (58℉)
- Average high temperature: 19℃ (66℉)
- Average low temperature: 10℃ (50℉)
- Average humidity: 72%
- Average sunny days: 14 days
- Average rainfall: 46mm (2") over 15 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Boston in May, make sure you pack a warm jacket or coat.
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Boston in June
- Average temperature: 19℃ (66℉)
- Average high temperature: 23℃ (74℉)
- Average low temperature: 14℃ (57℉)
- Average humidity: 75%
- Average sunny days: 15 days
- Average rainfall: 54mm (2") over 13 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Boston in June, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.
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Boston in July
- Average temperature: 23℃ (73℉)
- Average high temperature: 27℃ (81℉)
- Average low temperature: 18℃ (64℉)
- Average humidity: 74%
- Average sunny days: 16 days
- Average rainfall: 47mm (2") over 14 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Boston in July, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.
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Boston in August
- Average temperature: 22℃ (72℉)
- Average high temperature: 27℃ (80℉)
- Average low temperature: 18℃ (64℉)
- Average humidity: 73%
- Average sunny days: 17 days
- Average rainfall: 36mm (1") over 11 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Boston in August, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.
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Boston in September
- Average temperature: 18℃ (65℉)
- Average high temperature: 23℃ (73℉)
- Average low temperature: 14℃ (57℉)
- Average humidity: 75%
- Average sunny days: 18 days
- Average rainfall: 32mm (1") over 10 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Boston in September, make sure you pack a light jumper or hoodie for the evenings and some light clothes for the daytime.
Boston in October
- Average temperature: 13℃ (55℉)
- Average high temperature: 16℃ (61℉)
- Average low temperature: 9℃ (48℉)
- Average humidity: 75%
- Average sunny days: 16 days
- Average rainfall: 65mm (3") over 13 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Boston in October, make sure you pack a warm jacket or coat.
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Boston in November
- Average temperature: 6℃ (44℉)
- Average high temperature: 10℃ (50℉)
- Average low temperature: 3℃ (38℉)
- Average humidity: 72%
- Average sunny days: 17 days
- Average rainfall: 68mm (3") over 10 days
- Average snow days: 1 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Boston in November, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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Boston in December
- Average temperature: 2℃ (35℉)
- Average high temperature: 4℃ (40℉)
- Average low temperature: -1℃ (30℉)
- Average humidity: 76%
- Average sunny days: 16 days
- Average rainfall: 74mm (3") over 10 days
- Average snow days: 5 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Boston in December, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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