August weather forecast
Riverdale Heights, MD

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Weather in August

The last month of the summer, August, is another warm month in Riverdale Heights, Maryland, with an average temperature fluctuating between 68.7°F (20.4°C) and 85.1°F (29.5°C).

Temperature

Riverdale Heights experiences an average high-temperature of a moderately hot 85.1°F (29.5°C) with the onset of August, subtly varied from July's 87.4°F (30.8°C). Riverdale Heights throughout August, experiences an average nighttime temperature of 68.7°F (20.4°C).

Heat index

The average heat index in August is calculated to be a tropical 93.2°F (34°C). Exercise enhanced safety steps, heat cramps and heat exhaustion are probable. Heatstroke could be a result of sustained activity.
Heat index evaluations are typically in the context of light winds and shaded environments. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', melds the effects of warmth and moisture to generate a feeling of heat. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. 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

In August, the average relative humidity is 72%.

Rainfall

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

Snowfall

In Riverdale Heights, snow does not fall in May through November.

Daylight

In Riverdale Heights, Maryland, the average length of the day in August is 13h and 38min.
On the first day of the month, sunrise is at 6:09 am and sunset at 8:18 pm. On the last day of August, in Riverdale Heights, Maryland, sunrise is at 6:36 am and sunset at 7:39 pm EDT.

Sunshine

In August, the average sunshine in Riverdale Heights, Maryland, is 10.3h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: The average daily UV index of 6 in August transforms into the following instructions:
Resist overexposure. Safeguarding from solar damage is indispensable. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
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Frequently asked questions

How hot is August in Riverdale Heights?

August temperatures in Riverdale Heights vary between a high-temperature of 85.1°F (29.5°C) and a low-temperature of 68.7°F (20.4°C). In August, the average heat index (a.k.a. 'feels like', 'real feel'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 93.2°F (34°C).

What is the average humidity in August in Riverdale Heights?

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

What is the rainiest month in Riverdale Heights?

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

How much does it rain in Riverdale Heights in August?

In Riverdale Heights, Maryland, in August, during 15.8 rainfall days, 3.58" (91mm) of precipitation is typically accumulated.

When it does not snow in Riverdale Heights?

May through November are months without snowfall in Riverdale Heights, Maryland.

What is the average length of the day in August in Riverdale Heights?

In Riverdale Heights, the average day length in August is 13h and 38min.

What time are sunrise and sunset in August in Riverdale Heights?

On the first day of August in Riverdale Heights, Maryland, sunrise is at 6:09 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 Riverdale Heights?

The average sunshine duration in August in Riverdale Heights, Maryland, is 10.3h.

What are the months with the highest UV index in Riverdale Heights?

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

How high is the UV index in August in Riverdale Heights?

In August, the average daily maximum UV index in Riverdale Heights, Maryland, is 6. A UV Index value of 6 to 7 symbolizes a high health risk 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
Riverdale Heights, MD

Average temperature in August - Riverdale Heights, 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
Riverdale Heights, MD

Average pressure in August - Riverdale Heights, 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
Riverdale Heights, MD

Average wind speed in August - Riverdale Heights, 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
Riverdale Heights, MD

Average humidity in August - Riverdale Heights, 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
Riverdale Heights, MD

Average rainfall in August - Riverdale Heights, 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
Riverdale Heights, MD

Average rainfall days in August - Riverdale Heights, 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
Riverdale Heights, MD

Average snowfall in August - Riverdale Heights, 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
Riverdale Heights, MD

Average snowfall days in August - Riverdale Heights, 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
Riverdale Heights, MD

Average daylight in August / Average sunshine in August - Riverdale Heights, 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
Riverdale Heights, MD

Average sunshine days in August - Riverdale Heights, 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
Riverdale Heights, MD

Average UV index in August - Riverdale Heights, 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
Riverdale Heights, MD

Average cloud cover in August - Riverdale Heights, 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
Riverdale Heights, MD

Average visibility in August - Riverdale Heights, 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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Riverdale Heights, Maryland, USA

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