August weather forecast
Marriottsville, MD

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Weather in August

The last month of the summer, August, is also a moderately hot month in Marriottsville, Maryland, with an average temperature fluctuating between 82.6°F (28.1°C) and 64.9°F (18.3°C).

Temperature

With the transition into August, Marriottsville notes an average high-temperature of a still moderately hot 82.6°F (28.1°C), closely resembling July. An average minimum temperature of 64.9°F (18.3°C) is recorded during the month of August.

Heat index

For most parts of August, the heat index is computed to be a tropical 89.6°F (32°C). If exposure and activity persist, fatigue could ensue, possibly leading to heat cramps.
Remember that heat index calculations are made for conditions in the shade with light wind. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.

Humidity

In Marriottsville, the average relative humidity in August is 76%.

Rainfall

The month with the most rainfall in Marriottsville is August, when the rain falls for 16.8 days and typically aggregates up to 3.9" (99mm) of precipitation.

Snowfall

In Marriottsville, snow does not fall in June through October.

Daylight

The average length of the day in August in Marriottsville is 13h and 40min.
On the first day of the month, sunrise is at 6:08 am and sunset at 8:19 pm. On the last day of August, in Marriottsville, Maryland, sunrise is at 6:35 am and sunset at 7:39 pm EDT.

Sunshine

In Marriottsville, the average sunshine in August is 10.2h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: In August, a daily maximum UV index of 6 leads to the following instructions:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
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Frequently asked questions

How hot does it get in Marriottsville in August?

August temperatures in Marriottsville, Maryland, vary between a high-temperature of 82.6°F (28.1°C) and a low-temperature of 64.9°F (18.3°C). In August, the average heat index (a.k.a. 'real feel', 'feels like'), which calculates the temperature value influenced by the moisture in the air, is computed to be 89.6°F (32°C).

What is the average humidity in August in Marriottsville?

The average relative humidity in August in Marriottsville, Maryland, is 76%.

What is the rainiest month in Marriottsville?

The month with the most rainfall in Marriottsville is August, when the rain falls for 16.8 days and typically aggregates up to 3.9" (99mm) of precipitation.

How much does it rain in Marriottsville in August?

In Marriottsville, Maryland, in August, it is raining for 16.8 days, with typically 3.9" (99mm) of accumulated precipitation.

When it does not snow in Marriottsville?

June through October are months without snowfall.

What is the average length of the day in August in Marriottsville?

In Marriottsville, Maryland, the average day length in August is 13h and 40min.

When are sunrise and sunset in August in Marriottsville?

On the first day of August in Marriottsville, sunrise is at 6:08 am and sunset at 8:19 pm. On the last day of the month, sunrise is at 6:35 am and sunset at 7:39 pm EDT.

How long on average sun shines in August in Marriottsville?

In August, the average sunshine duration in Marriottsville is 10.2h.

When is the highest UV index in Marriottsville?

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

How high is the UV index in August in Marriottsville?

In Marriottsville, Maryland, the average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high hazard to health from 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
Marriottsville, MD

Average temperature in August - Marriottsville, MD
  • Average high temperature in August: 82.6°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 (37.6°F).

  • Average low temperature in August: 64.9°F

The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (25°F).

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Average pressure in August
Marriottsville, MD

Average pressure in August - Marriottsville, 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
Marriottsville, MD

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

The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).

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Average humidity in August
Marriottsville, MD

Average humidity in August - Marriottsville, MD
  • Average humidity in August: 76%

The month with the highest relative humidity is May (79%).
The months with the lowest relative humidity are April and July (74%).

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Average rainfall in August
Marriottsville, MD

Average rainfall in August - Marriottsville, MD
  • Average rainfall in August: 3.9"

The wettest month (with the highest rainfall) is August (3.9").
The driest month (with the least rainfall) is February (1.97").

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Average rainfall days in August
Marriottsville, MD

Average rainfall days in August - Marriottsville, MD
  • Average rainfall days in August: 16.8 days

The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is January (8.6 days).

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Average snowfall in August
Marriottsville, MD

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

The month with the highest snowfall is March (2.8").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in August
Marriottsville, MD

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

The month with the highest number of snowfall days is January (5.6 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight in August /
Average sunshine in August
Marriottsville, MD

Average daylight in August / Average sunshine in August - Marriottsville, 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 months with the least sunshine are January and February (Average sunshine: 4h and 48min).

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Average sunshine days in August
Marriottsville, MD

Average sunshine days in August - Marriottsville, MD
  • Average sunshine days in August: 12 days

The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is May (11.2 days).

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Average UV index in August
Marriottsville, MD

Average UV index in August - Marriottsville, 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).

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Average cloud cover in August
Marriottsville, MD

Average cloud cover in August - Marriottsville, MD
  • Average cloud cover in August: 33

The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).

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Average visibility in August
Marriottsville, MD

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

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