August weather forecast
Adelphi, MD

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Weather in August

The last month of the summer, August, is another warm month in Adelphi, Maryland, with an average temperature varying between 85.6°F (29.8°C) and 68.2°F (20.1°C).

Temperature

The ushering in of August brings an average high-temperature of a warm 85.6°F (29.8°C), closely mirroring the 87.4°F (30.8°C) of July. In August, Adelphi's temperature tends to fall to an average low of 68.2°F (20.1°C) during the night.

Heat index

The heat index value for August is evaluated at a sweltering 95°F (35°C). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.
The standards for the heat index are set for locations in shade and under light breezes. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'feels like' or 'felt air temperature', gives a temperature feeling by integrating air temperature and humidity. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. 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.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

In Adelphi, the average relative humidity in August is 70%.

Rainfall

The month with the most rainfall in Adelphi is August, when the rain falls for 16.3 days and typically aggregates up to 3.86" (98mm) of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

The average length of the day in August is 13h and 39min.
On the first day of August in Adelphi, Maryland, sunrise is at 6:09 am and sunset at 8:19 pm. On the last day of the month, sunrise is at 6:36 am and sunset at 7:39 pm EDT.

Sunshine

In Adelphi, Maryland, the average sunshine in August is 10.1h.

UV index

The months with the highest UV index in Adelphi are May through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: In August, the UV index of 6 transforms into the following advice:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
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Frequently asked questions

How hot is August in Adelphi?

The high-temperature, in August, in Adelphi, is 85.6°F (29.8°C), while the low-temperature averages to 68.2°F (20.1°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in August is evaluated at 95°F (35°C).

What is the average humidity in August in Adelphi?

In Adelphi, Maryland, the average relative humidity in August is 70%.

What is the rainiest month in Adelphi?

August is the month with the most rainfall in Adelphi. Rain falls for 16.3 days and accumulates 3.86" (98mm) of precipitation.

How much does it rain in Adelphi in August?

In Adelphi, in August, it is raining for 16.3 days, with typically 3.86" (98mm) of accumulated precipitation.

When it does not snow in Adelphi?

May through October are months without snowfall in Adelphi, Maryland.

How many hours of daylight does Adelphi have in August?

The average day length in August in Adelphi, Maryland, is 13h and 39min.

When is the sunrise / sunset in August in Adelphi?

On the first day of August in Adelphi, sunrise is at 6:09 am and sunset at 8:19 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 Adelphi?

In Adelphi, Maryland, the average sunshine duration in August is 10.1h.

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

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 Adelphi?

The average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high health threat 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
Adelphi, MD

Average temperature in August - Adelphi, MD
  • Average high temperature in August: 85.6°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 (39.7°F).

  • Average low temperature in August: 68.2°F

The month with the highest average low temperature is July (69.6°F).
The coldest month (with the lowest average low temperature) is January (27.1°F).

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Average pressure in August
Adelphi, MD

Average pressure in August - Adelphi, 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 (29.95"Hg).

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Average wind speed in August
Adelphi, MD

Average wind speed in August - Adelphi, MD
  • Average wind speed in August: 5.2mph

The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

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Average humidity in August
Adelphi, MD

Average humidity in August - Adelphi, MD
  • Average humidity in August: 70%

The months with the highest relative humidity are May, October and December (75%).
The month with the lowest relative humidity is July (69%).

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Average rainfall in August
Adelphi, MD

Average rainfall in August - Adelphi, 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 (1.89").

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Average rainfall days in August
Adelphi, MD

Average rainfall days in August - Adelphi, MD
  • Average rainfall days in August: 16.3 days

The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is November (8.5 days).

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Average snowfall in August
Adelphi, MD

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

The month with the highest snowfall is January (2.87").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in August
Adelphi, MD

Average snowfall days in August - Adelphi, 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
Adelphi, MD

Average daylight in August / Average sunshine in August - Adelphi, 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 1min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

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Average sunshine days in August
Adelphi, MD

Average sunshine days in August - Adelphi, MD
  • Average sunshine days in August: 13.8 days

The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is May (12 days).

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Average UV index in August
Adelphi, MD

Average UV index in August - Adelphi, 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
Adelphi, MD

Average cloud cover in August - Adelphi, MD
  • Average cloud cover in August: 34

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 32).

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Average visibility in August
Adelphi, MD

Average visibility in August - Adelphi, MD
  • Average visibility in August: 6mi

The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).

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Adelphi, Maryland, USA

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