August weather forecast
Mount Rainier, MD

Weather in August

The last month of the summer, August, is also a moderately hot month in Mount Rainier, Maryland, with average temperature fluctuating between 85.1°F (29.5°C) and 68.7°F (20.4°C).

Temperature

In August, the average high-temperature is almost the same as in July - a warm 85.1°F (29.5°C). In August, the average low-temperature is 68.7°F (20.4°C).

Heat index

In August, the average heat index is calculated to be a hot 93.7°F (34.3°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'feels like', or 'real feel', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. This effect is individual, with diverse people perceiving weather differently for numerous reasons (pregnancy, metabolic differences, differences in body mass, height, and shape), and activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In August, the average relative humidity is 72%.

Rainfall

The month with the most rainfall is August when the rain falls for 15.8 days and typically aggregates up to 3.58" (91mm) of precipitation.

Snowfall

May through November are months without snowfall in Mount Rainier.

Daylight

In August, the average length of the day in Mount Rainier is 13.6h.

Sunshine

In Mount Rainier, Maryland, the average sunshine is 10.3h.

UV index

Months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to the UV radiation for the average person.
Note: The average daily UV index of 6 in August transform into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in August in Mount Rainier?

In Mount Rainier, in August, the average high-temperature is 85.1°F (29.5°C), and the average low-temperature is 68.7°F (20.4°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines air temperature and relative humidity, in August is calculated to be 93.7°F (34.3°C).

What is the average humidity in August in Mount Rainier?

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

What is the rainiest month in Mount Rainier?

The month with the most rainfall in Mount Rainier is August when the rain falls for 15.8 days and typically aggregates up to 3.58" (91mm) of precipitation.

How much does it rain in Mount Rainier in August?

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

When it does not snow in Mount Rainier?

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

What is the average length of the day in August in Mount Rainier?

The average length of the day in August in Mount Rainier, Maryland, is 13.6h.

How many hours of sunshine does Mount Rainier have in August?

In Mount Rainier, the average sunshine in August is 10.3h.

What is the month with the highest UV index in Mount Rainier?

Months with the highest UV index in Mount Rainier are May through August, with an average maximum UV index of 6.

What is the UV index intensity in August in Mount Rainier?

The average daily maximum UV index in August in Mount Rainier, Maryland, is 6. A UV Index estimate of 6 to 7 represents a high health risk from the exposure to the Sun's UV radiation.

Average temperature in August
Mount Rainier, MD

Average temperature in August - Mount Rainier, 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
Mount Rainier, MD

Average pressure in August - Mount Rainier, MD
  • Average pressure in August: 29.99"

The month with the highest atmospheric pressure is November (30.14").
The month with the lowest atmospheric pressure is June (29.94").

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Average wind speed in August
Mount Rainier, MD

Average wind speed in August - Mount Rainier, 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
Mount Rainier, MD

Average humidity in August - Mount Rainier, MD
  • Average humidity in August: 72%

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

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Average rainfall in August
Mount Rainier, MD

Average rainfall in August - Mount Rainier, 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
Mount Rainier, MD

Average rainfall days in August - Mount Rainier, 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
Mount Rainier, MD

Average snowfall in August - Mount Rainier, MD
  • Average snowfall in August: 0"

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

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Average snowfall days in August
Mount Rainier, MD

Average snowfall days in August - Mount Rainier, MD
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (4.1 days).
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
Mount Rainier, MD

Average daylight in August / Average sunshine in August - Mount Rainier, MD
  • Average daylight in August: 13.6h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in August: 10.3h

The month with the most sunshine is July (Average sunshine: 10.9h).
The month with the least sunshine is February (Average sunshine: 5h).

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Average sunshine days in August
Mount Rainier, MD

Average sunshine days in August - Mount Rainier, 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
Mount Rainier, MD

Average UV index in August - Mount Rainier, MD
  • Average UV index in August: 6

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January and December (UV index 2).

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Average cloud cover in August
Mount Rainier, MD

Average cloud cover in August - Mount Rainier, 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
Mount Rainier, MD

Average visibility in August - Mount Rainier, MD
  • Average visibility in August: 6mi

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

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