August weather forecastCharlestown, MA
August
Weather in August
August, the last month of the summer in Charlestown, is also a moderately hot month, with an average temperature ranging between max 80.4°F (26.9°C) and min 63.5°F (17.5°C).Temperature
Charlestown's average high-temperature marks a still warm 80.4°F (26.9°C) with the advent of August, closely mirroring that of the preceding month. During the month of August, an average low-temperature of 63.5°F (17.5°C) is recorded.Humidity
In August, the average relative humidity is 73%.Rainfall
In Charlestown, during August, the rain falls for 4.4 days and regularly aggregates up to 0.24" (6mm) of precipitation. Throughout the year, there are 47.8 rainfall days, and 4.13" (105mm) of precipitation is accumulated.Snowfall
June through October are months without snowfall.Daylight
The average length of the day in August is 13h and 51min.On the first day of August in Charlestown, 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
August has the most sunshine of the year, 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. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index of 6 during August translates into these guidelines:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Charlestown, MA
- Average high temperature in August: 80.4°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (33.8°F).
- Average low temperature in August: 63.5°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure in August
Charlestown, 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
Charlestown, MA
- Average wind speed in August: 6mph
The windiest month (with the highest average wind speed) is January (9.6mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in August
Charlestown, MA
- Average humidity in August: 73%
The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (69%).
Average rainfall in August
Charlestown, MA
- Average rainfall in August: 0.24"
The wettest month (with the highest rainfall) is November (0.55").
The driest month (with the least rainfall) is September (0.12").
Average rainfall days in August
Charlestown, MA
- Average rainfall days in August: 4.4 days
The month with the highest number of rainy days is April (5.9 days).
The months with the least rainy days are January and September (2.9 days).
Average snowfall in August
Charlestown, MA
- Average snowfall in August: 0"
The month with the highest snowfall is December (0.71").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in August
Charlestown, MA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (3.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Charlestown, MA
- Average daylight in August: 13h and 48min
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 30min
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
Charlestown, MA
- Average sunshine days in August: 24.1 days
The month with the most sunshine days is December (25.5 days).
The month with the least sunshine days is July (22.8 days).
Average UV index in August
Charlestown, 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
Charlestown, MA
- Average cloud cover in August: 32
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in August
Charlestown, 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).
