August weather forecast
Greenbelt, MD

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Weather in August

Not so far behind from July, August brings a slight dip in temperature as well as in the duration of daylight. The classic summertime weather, with temperatures from 68.7°F (20.4°C) to 85.1°F (29.5°C), persists throughout, providing continued opportunities for summertime recreation. However, August also serves the maximum rainfall, 3.58" (91mm) for Maryland. The sun showers often result in beautiful rainbows, adding charm to the Greenbelt skyline.

Temperature

Greenbelt notes an average high-temperature of a moderately hot 85.1°F (29.5°C) in August, hardly diverging from July. The average temperature drops to a pleasant 68.7°F (20.4°C) during the night in the month of August.

Heat index

In August, the heat index is calculated to be a hot 93.2°F (34°C). Exercise enhanced safety steps, heat cramps and heat exhaustion are probable. Heatstroke could be a result of sustained activity.
It is essential to grasp that the heat index's numbers are for shade and light wind settings. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a metric representing the sensation of warmth when air temperature and moisture come together. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.

Humidity

In Greenbelt, Maryland, the average relative humidity in August is 72%.

Rainfall

August is the month with the most rainfall. Rain falls for 15.8 days and accumulates 3.58" (91mm) of precipitation.

Snowfall

In Greenbelt, snow does not fall in May through November.

Daylight

The average length of the day in August in Greenbelt is 13h and 39min.
On the first day of the month, sunrise is at 6:08 am and sunset at 8:18 pm. On the last day of August, sunrise is at 6:36 am and sunset at 7:39 pm EDT.

Sunshine

The average sunshine in August is 10.3h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index in Greenbelt. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index of 6 in August interprets into the following recommendations:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
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Frequently asked questions

How hot is it in Greenbelt in August?

In Greenbelt, 85.1°F (29.5°C) is the average high-temperature and 68.7°F (20.4°C) is the average low-temperature during August. In August, the average heat index (a.k.a. 'real feel', 'feels like'), which combines air temperature and relative humidity, is calculated to be 93.2°F (34°C).

What is the average humidity in August in Greenbelt?

In August, the average relative humidity in Greenbelt, Maryland, is 72%.

What is the rainiest month in Greenbelt?

August is the month with the most rainfall in Greenbelt, Maryland. Rain falls for 15.8 days and accumulates 3.58" (91mm) of precipitation.

How much does it rain in Greenbelt in August?

In August, in Greenbelt, Maryland, the rain falls for 15.8 days. Throughout August, 3.58" (91mm) of precipitation is accumulated.

When it does not snow in Greenbelt?

In Greenbelt, Maryland, snow does not fall in May through November.

How many hours of daylight does Greenbelt have in August?

In August, the average day length is 13h and 39min.

When is the sunrise / sunset in August in Greenbelt?

On the first day of August, sunrise is at 6:08 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 6:36 am and sunset at 7:39 pm EDT.

How long on average sun shines in August in Greenbelt?

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

What is the month with the highest UV index in Greenbelt?

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

What is the UV index reading in August in Greenbelt?

In Greenbelt, the average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation.
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
Greenbelt, MD

Average temperature in August - Greenbelt, MD
  • Average high temperature in August: 85.1°F

The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.9°F).

  • Average low temperature in August: 68.7°F

The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (27.7°F).

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Average pressure in August
Greenbelt, MD

Average pressure in August - Greenbelt, 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
Greenbelt, MD

Average wind speed in August - Greenbelt, MD
  • Average wind speed in August: 5.3mph

The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

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Average humidity in August
Greenbelt, MD

Average humidity in August - Greenbelt, MD
  • Average humidity in August: 72%

The months with the highest relative humidity are May, October and December (76%).
The months with the lowest relative humidity are April and July (71%).

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Average rainfall in August
Greenbelt, MD

Average rainfall in August - Greenbelt, MD
  • Average rainfall in August: 3.58"

The wettest month (with the highest rainfall) is August (3.58").
The driest month (with the least rainfall) is January (2.01").

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Average rainfall days in August
Greenbelt, MD

Average rainfall days in August - Greenbelt, MD
  • Average rainfall days in August: 15.8 days

The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is November (9 days).

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Average snowfall in August
Greenbelt, MD

Average snowfall in August - Greenbelt, MD
  • Average snowfall in August: 0"

The month with the highest snowfall is January (2.6").
The months with the least snowfall are May, June, July, August, September, October and November (0").

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Average snowfall days in August
Greenbelt, MD

Average snowfall days in August - Greenbelt, MD
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (4.1 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
Greenbelt, MD

Average daylight in August / Average sunshine in August - Greenbelt, 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 30min).

  • Average sunshine in August: 10h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

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Average sunshine days in August
Greenbelt, MD

Average sunshine days in August - Greenbelt, MD
  • Average sunshine days in August: 12.8 days

The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is May (11.8 days).

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Average UV index in August
Greenbelt, MD

Average UV index in August - Greenbelt, 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 and December (UV index 2).

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Average cloud cover in August
Greenbelt, MD

Average cloud cover in August - Greenbelt, MD
  • Average cloud cover in August: 31

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 29).

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Average visibility in August
Greenbelt, MD

Average visibility in August - Greenbelt, 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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Greenbelt, Maryland, USA

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