Weather in Boston
Live weather and 7-day forecast for Boston, United States, followed by what to expect in each month of the year.
Sunrise 07:06 Sunset 17:53 Daylight 10h 47m Sun times →
Next 24 hours
7-day forecast
Forecast data from Open-Meteo
Climate in Boston: month by month
Averaged over 2023–2025, the warmest month in Boston is July, with highs around 29 °C (85 °F) and lows around 20 °C (68 °F); the coolest is January, with highs around 4 °C (38 °F) and lows around -4 °C (25 °F). Average lows fall below freezing in December–February.
Boston gets about 1,219 mm (48 in) of precipitation a year. The wettest month is March (144 mm over about 11 days) and the driest is February (58 mm).
| Month | Avg high | Avg low | Precipitation (in) | Wet days | Daylight |
|---|---|---|---|---|---|
| January | 38° | 25° | 5.3 | 12 | 9h 25m |
| February | 40° | 24° | 2.3 | 7 | 10h 35m |
| March | 49° | 32° | 5.7 | 11 | 11h 54m |
| April | 58° | 41° | 3.2 | 9 | 13h 22m |
| May | 68° | 50° | 5.0 | 12 | 14h 35m |
| June | 78° | 60° | 3.3 | 12 | 15h 16m |
| July | 85° | 68° | 5.1 | 15 | 14h 59m |
| August | 80° | 63° | 3.7 | 12 | 13h 55m |
| September | 74° | 58° | 4.4 | 10 | 12h 31m |
| October | 64° | 48° | 2.9 | 7 | 11h 6m |
| November | 51° | 36° | 2.3 | 7 | 9h 48m |
| December | 41° | 28° | 4.9 | 11 | 9h 6m |
Averages of daily values from the ERA5 reanalysis for 2023–2025 at Boston's coordinates (model elevation 9 m), via Open-Meteo (CC BY 4.0). Three recent years are not a 30-year climate normal; reanalysis smooths local extremes and tends to count more light-rain days than a rain gauge would. Daylight is sunrise to sunset on the 15th of each month.
Weather questions for Boston
What is the hottest month in Boston?
July, with average highs of 29 °C (85 °F) and lows of 20 °C (68 °F) over 2023–2025. The coolest month is January, averaging 4 °C (38 °F) by day and -4 °C (25 °F) at night.
What is the rainiest month in Boston?
March, with about 144 mm of precipitation on roughly 11 days. The driest month is February (58 mm), and the yearly total is around 1,219 mm.
When is the weather mildest in Boston?
Going by the averages, May–June and August–September are the months with average daytime highs between 18 °C and 27 °C (64–81 °F) — warm but not hot. March is the month most likely to bring rain.
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About this forecast
The live forecast comes from Open-Meteo, which blends models from national weather services and is fetched fresh in your browser on each visit. Times in the hourly outlook are Boston local time (America/New_York).