August weather forecast
Upper Marlboro, MD

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Weather in August

The last month of the summer, August, is also a moderately hot month in Upper Marlboro, Maryland, with an average temperature ranging between min 68.5°F (20.3°C) and max 84.6°F (29.2°C).

Temperature

In August, Upper Marlboro experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 86.7°F (30.4°C) in July to a moderately hot 84.6°F (29.2°C). Upper Marlboro reports an average nighttime low-temperature of 68.5°F (20.3°C) in August.

Heat index

August's mean heat index is evaluated at a hot 93.2°F (34°C). Apply extra caution, heat cramps and heat exhaustion could happen. Heatstroke might occur with long-duration activity.
It is crucial to understand that heat index figures are for shade and gentle wind conditions. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', reflects the feeling of heat when considering both air temperature and humidity. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.

Humidity

The average relative humidity in August in Upper Marlboro is 74%.

Rainfall

The month with the most rainfall in Upper Marlboro is August, when the rain falls for 17.3 days and typically aggregates up to 3.94" (100mm) of precipitation.

Snowfall

In Upper Marlboro, snow does not fall in May through October.

Daylight

In Upper Marlboro, the average length of the day in August is 13h and 38min.
On the first day of August, sunrise is at 6:08 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 6:35 am and sunset at 7:38 pm EDT.

Sunshine

The average sunshine in August in Upper Marlboro is 10.3h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the average person.
Note: In August, the maximum UV index of 6 transforms into these recommendations:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
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Frequently asked questions

Is it hot in Upper Marlboro during August?

Upper Marlboro in August has an average high-temperature of 84.6°F (29.2°C) and an average low-temperature of 68.5°F (20.3°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in August is evaluated at 93.2°F (34°C).

What is the average humidity in August in Upper Marlboro?

The average relative humidity in August in Upper Marlboro is 74%.

What is the rainiest month in Upper Marlboro?

The month with the most rainfall in Upper Marlboro is August, when the rain falls for 17.3 days and typically aggregates up to 3.94" (100mm) of precipitation.

How much does it rain in Upper Marlboro in August?

In Upper Marlboro, Maryland, in August, during 17.3 rainfall days, 3.94" (100mm) of precipitation is typically accumulated.

When it does not snow in Upper Marlboro?

May through October are months without snowfall in Upper Marlboro, Maryland.

How many hours of daylight does Upper Marlboro have in August?

The average day length in August in Upper Marlboro is 13h and 38min.

When is the sunrise / sunset in August in Upper Marlboro?

On the first day of August in Upper Marlboro, Maryland, sunrise is at 6:08 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 6:35 am and sunset at 7:38 pm EDT.

How long on average sun shines in August in Upper Marlboro?

In Upper Marlboro, the average sunshine duration in August is 10.3h.

What are the months with the highest UV index in Upper Marlboro?

May through August, with an average maximum UV index of 6, are months with the highest UV index.

What is the UV index intensity in August in Upper Marlboro?

In Upper Marlboro, Maryland, the average daily maximum UV index in August is 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Upper Marlboro, MD

Average temperature in August - Upper Marlboro, MD
  • Average high temperature in August: 84.6°F

The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is January (40.1°F).

  • Average low temperature in August: 68.5°F

The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (28.2°F).

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Average pressure in August
Upper Marlboro, MD

Average pressure in August - Upper Marlboro, MD
  • Average pressure in August: 29.99"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in August
Upper Marlboro, MD

Average wind speed in August - Upper Marlboro, MD
  • Average wind speed in August: 5.4mph

The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.4mph).

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Average humidity in August
Upper Marlboro, MD

Average humidity in August - Upper Marlboro, MD
  • Average humidity in August: 74%

The month with the highest relative humidity is May (77%).
The months with the lowest relative humidity are January, March and April (72%).

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Average rainfall in August
Upper Marlboro, MD

Average rainfall in August - Upper Marlboro, MD
  • Average rainfall in August: 3.94"

The wettest month (with the highest rainfall) is August (3.94").
The driest month (with the least rainfall) is January (2.05").

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Average rainfall days in August
Upper Marlboro, MD

Average rainfall days in August - Upper Marlboro, MD
  • Average rainfall days in August: 17.3 days

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is November (8.8 days).

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Average snowfall in August
Upper Marlboro, MD

Average snowfall in August - Upper Marlboro, MD
  • Average snowfall in August: 0"

The month with the highest snowfall is January (2.76").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in August
Upper Marlboro, MD

Average snowfall days in August - Upper Marlboro, MD
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (4.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in August /
Average sunshine in August
Upper Marlboro, MD

Average daylight in August / Average sunshine in August - Upper Marlboro, MD
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in August: 10h and 2min

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).

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Average sunshine days in August
Upper Marlboro, MD

Average sunshine days in August - Upper Marlboro, MD
  • Average sunshine days in August: 11.7 days

The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (10.8 days).

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Average UV index in August
Upper Marlboro, MD

Average UV index in August - Upper Marlboro, 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, November and December (UV index 2).

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Average cloud cover in August
Upper Marlboro, MD

Average cloud cover in August - Upper Marlboro, MD
  • Average cloud cover in August: 31

The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 29).

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Average visibility in August
Upper Marlboro, MD

Average visibility in August - Upper Marlboro, MD
  • 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).

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Upper Marlboro, Maryland, USA

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