August weather forecast
Riderwood, MD

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Weather in August

August, the last month of the summer in Riderwood, is also a moderately hot month, with an average temperature varying between 66.7°F (19.3°C) and 82.8°F (28.2°C).

Temperature

Riderwood marks the onset of August with an average high-temperature of a still moderately hot 82.8°F (28.2°C), subtly divergent from July's 84.9°F (29.4°C). Riderwood experiences a steady low-temperature of 66.7°F (19.3°C) throughout August.

Heat index

For August, the heat index is evaluated at a tropical 89.6°F (32°C). If one sustains activity during exposure, it could lead to a sense of fatigue, with a chance of heat cramps.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'real feel' or 'apparent temperature', gives an indication of how one might feel in terms of heat after considering humidity. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.

Humidity

The average relative humidity in August is 75%.

Rainfall

The month with the most rainfall is August, when the rain falls for 11.3 days and typically aggregates up to 1.46" (37mm) of precipitation.

Snowfall

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

Daylight

In August, the average length of the day is 13h and 40min.
On the first day of the month, sunrise is at 6:07 am and sunset at 8:18 pm. On the last day of August, in Riderwood, sunrise is at 6:34 am and sunset at 7:38 pm EDT.

Sunshine

In Riderwood, 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 Riderwood. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: A maximum high UV index of 6 in August translates into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Boost your sun resistance with garments that are densely woven yet spacious.
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Frequently asked questions

How hot does it get in Riderwood in August?

August temperatures in Riderwood, Maryland, vary between a high-temperature of 82.8°F (28.2°C) and a low-temperature of 66.7°F (19.3°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in August is evaluated at 89.6°F (32°C).

What is the average humidity in August in Riderwood?

In Riderwood, the average relative humidity in August is 75%.

What is the wettest month in Riderwood?

August is the month with the most rainfall. Rain falls for 11.3 days and accumulates 1.46" (37mm) of precipitation.

How many days does it rain in August in Riderwood?

In Riderwood, Maryland, in August, during 11.3 rainfall days, 1.46" (37mm) of precipitation is typically accumulated.

When it does not snow in Riderwood?

In Riderwood, Maryland, snow does not fall in May through October.

How many hours of daylight does Riderwood have in August?

The average day length in August in Riderwood, Maryland, is 13h and 40min.

When is the sunrise / sunset in August in Riderwood?

On the first day of August in Riderwood, Maryland, sunrise is at 6:07 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 6:34 am and sunset at 7:38 pm EDT.

How many hours of sunshine does Riderwood have in August?

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

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

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

How high is the UV index in August in Riderwood?

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

Average temperature in August - Riderwood, MD
  • Average high temperature in August: 82.8°F

The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (37.9°F).

  • Average low temperature in August: 66.7°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (25.9°F).

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Average pressure in August
Riderwood, MD

Average pressure in August - Riderwood, 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
Riderwood, MD

Average wind speed in August - Riderwood, MD
  • Average wind speed in August: 5.5mph

The windiest month (with the highest average wind speed) is March (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

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Average humidity in August
Riderwood, MD

Average humidity in August - Riderwood, MD
  • Average humidity in August: 75%

The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is April (73%).

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Average rainfall in August
Riderwood, MD

Average rainfall in August - Riderwood, MD
  • Average rainfall in August: 1.46"

The wettest month (with the highest rainfall) is August (1.46").
The driest month (with the least rainfall) is January (0.47").

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Average rainfall days in August
Riderwood, MD

Average rainfall days in August - Riderwood, MD
  • Average rainfall days in August: 11.3 days

The month with the highest number of rainy days is July (12.6 days).
The month with the least rainy days is January (5.2 days).

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Average snowfall in August
Riderwood, MD

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

The month with the highest snowfall is January (0.55").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in August
Riderwood, MD

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

The month with the highest number of snowfall days is February (3.8 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
Riderwood, MD

Average daylight in August / Average sunshine in August - Riderwood, 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 2min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

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Average sunshine days in August
Riderwood, MD

Average sunshine days in August - Riderwood, MD
  • Average sunshine days in August: 16.2 days

The month with the most sunshine days is November (22.9 days).
The month with the least sunshine days is July (15.2 days).

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Average UV index in August
Riderwood, MD

Average UV index in August - Riderwood, 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
Riderwood, MD

Average cloud cover in August - Riderwood, MD
  • Average cloud cover in August: 32

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).

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Average visibility in August
Riderwood, MD

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

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