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
August experiences an average high-temperature of a still moderately hot 82.8°F (28.2°C), barely different from July's 84.7°F (29.3°C). In August, Charlestown reports a consistent average low-temperature of 65.7°F (18.7°C) during the nights.Heat index
The heat index for August is evaluated at a hot 89.6°F (32°C). Enduring exposure and continuous activity might cause a feeling of tiredness and induce heat cramps.Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is an aggregate value of air's warmth and moisture to show the human-felt temperature. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
Humidity
In August, the average relative humidity is 78%.Rainfall
August is the month with the most rainfall. Rain falls for 15.6 days and accumulates 3.86" (98mm) of precipitation.Snowfall
April, June through October are months without snowfall.Ocean temperature
The month with the warmest seawater in Charlestown is August, with an average ocean temperature of 76.3°F (24.6°C).Note: Your comfort in 76.3°F (24.6°C) waters hinges on your relationship with the cold, today's sunny disposition, wind patterns, and the air's temperature. For context, Olympic swimmers are no strangers to waters of 77°F (25°C) to 82.4°F (28°C).
Daylight
The average length of the day in August in Charlestown is 13h and 41min.On the first day of August, sunrise is at 6:04 am and sunset at 8:16 pm. On the last day of the month, sunrise is at 6:31 am and sunset at 7:36 pm EDT.
Sunshine
The average sunshine in August is 10.2h.UV index
The months with the highest UV index in Charlestown are May through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 6 during August leads to these advisories:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Take heed! Reflections of sand and water make the Sun's UV rays stronger.
Frequently asked questions
How hot is August in Charlestown?
What is the average humidity in August in Charlestown?
What is the rainiest month in Charlestown?
How much does it rain in Charlestown in August?
When it does not snow in Charlestown?
What month is the ocean warmest in Charlestown?
How warm is the water in August in Charlestown?
How many hours of daylight does Charlestown have in August?
What time are sunrise and sunset in August in Charlestown?
How long on average sun shines in August in Charlestown?
What is the month with the highest UV index in Charlestown?
What is the UV index reading in August in Charlestown?
Average temperature in August
Charlestown, MD
- Average high temperature in August: 82.8°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in August: 65.7°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in August
Charlestown, MD
- Average pressure in August: 29.99"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in August
Charlestown, MD
- Average wind speed in August: 5.3mph
The windiest months (with the highest average wind speed) are February and March (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in August
Charlestown, MD
- Average humidity in August: 78%
The months with the highest relative humidity are May and June (79%).
The month with the lowest relative humidity is April (74%).
Average rainfall in August
Charlestown, MD
- Average rainfall in August: 3.86"
The wettest month (with the highest rainfall) is August (3.86").
The driest month (with the least rainfall) is January (1.85").
Average rainfall days in August
Charlestown, MD
- Average rainfall days in August: 15.6 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in August
Charlestown, MD
- Average snowfall in August: 0"
The month with the highest snowfall is January (2.24").
The months with the least snowfall are April, June, July, August, September and October (0").
Average snowfall days in August
Charlestown, MD
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (4.4 days).
The months with the least snowfall days are April, June, July, August, September and October (0 days).
Average sea temperature in August
Charlestown, MD
- Average sea temperature in August: 76.3°F
The best month for swimming (with the highest average sea temperature) is August (76.3°F).
The coldest month (with the lowest average sea temperature) is February (40.9°F).
Average daylight in August /
Average sunshine in August
Charlestown, MD
- Average daylight in August: 13h and 4min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in August: 10h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in August
Charlestown, MD
- Average sunshine days in August: 13.2 days
The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is July (11.6 days).
Average UV index in August
Charlestown, MD
- Average UV index in August: 6
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in August
Charlestown, MD
- Average cloud cover in August: 32
The months with the most cloud cover are February and March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in August
Charlestown, MD
- Average visibility in August: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Charlestown, Maryland, USA
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