Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average sea temperature in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
The transition from July to August sees average high-temperatures adjusting to a still warm 80.4°F (26.9°C), from a not significantly different 81.7°F (27.6°C). Boston records an average temperature drop to a comfortable 64°F (17.8°C) in August.Humidity
The average relative humidity in August in Boston is 72%.Rainfall
In Boston, Massachusetts, in August, it is raining for 11.7 days, with typically 1.61" (41mm) of accumulated precipitation. In Boston, during the entire year, the rain falls for 141.4 days and collects up to 27.2" (691mm) of precipitation.Snowfall
June through September are months without snowfall in Boston.Ocean temperature
August is the month with the warmest seawater, with an average ocean temperature of 68°F (20°C).Note: Swimming in water at 68°F (20°C) is not a pleasing experience for the majority. As the temperature descends from 69.8°F (21°C) to 59°F (15°C), controlling breathing becomes increasingly hard.
Daylight
In August, the average length of the day in Boston, Massachusetts, is 13h and 51min.On the first day of August in Boston, sunrise is at 5:37 am and sunset at 8:03 pm. On the last day of the month, sunrise is at 6:09 am and sunset at 7:19 pm EDT.
Sunshine
The month with the most sunshine is August, with an average of 10.5h of sunshine.UV index
June through August, with an average maximum UV index of 6, are months with the highest UV index in Boston, Massachusetts. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the average person.Note: The daily high UV index of 6 in August translates into this advice:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Frequently asked questions
What are August temperatures in Boston?
What is the average humidity in August in Boston?
How much does it rain in Boston in August?
When it does not snow in Boston?
When is the ocean warmest in Boston?
What is the ocean temperature in August in Boston?
How many hours of daylight does Boston have in August?
What time are sunrise and sunset in August in Boston?
What month has the most sunshine in Boston?
How long on average sun shines in August in Boston?
When is the highest UV index in Boston?
What is the UV index reading in August in Boston?
Average temperature in August
Boston, MA
- Average high temperature in August: 80.4°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (34.2°F).
- Average low temperature in August: 64°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure in August
Boston, MA
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in August
Boston, MA
- Average wind speed in August: 6.2mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in August
Boston, MA
- Average humidity in August: 72%
The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is April (69%).
Average rainfall in August
Boston, MA
- Average rainfall in August: 1.61"
The wettest months (with the highest rainfall) are March, April and December (2.91").
The driest month (with the least rainfall) is September (1.26").
Average rainfall days in August
Boston, MA
- Average rainfall days in August: 11.7 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in August
Boston, MA
- Average snowfall in August: 0"
The month with the highest snowfall is February (4.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Boston, MA
- Average snowfall days in August: 0 days
The months with the highest number of snowfall days are January and February (7.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in August
Boston, MA
- Average sea temperature in August: 67.9°F
The best month for swimming (with the highest average sea temperature) is August (67.9°F).
The coldest month (with the lowest average sea temperature) is February (38.1°F).
Average daylight in August /
Average sunshine in August
Boston, MA
- Average daylight in August: 13h and 5min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in August: 10h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in August
Boston, MA
- Average sunshine days in August: 17 days
The month with the most sunshine days is September (17.7 days).
The month with the least sunshine days is April (13 days).
Average UV index in August
Boston, MA
- Average UV index in August: 6
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in August
Boston, MA
- Average cloud cover in August: 32
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in August
Boston, MA
- Average visibility in August: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Boston, Massachusetts, USA
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