August weather forecast
Rio Vista, MD

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Weather in August

August, the last month of the summer in Rio Vista, is another warm month, with an average temperature ranging between max 82.9°F (28.3°C) and min 70.3°F (21.3°C).

Temperature

August's arrival registers an average high-temperature of a still warm 82.9°F (28.3°C), closely aligning with the temperature of the previous month. Throughout August, Rio Vista's nights cool down to an average of 70.3°F (21.3°C).

Heat index

The heat index for August is evaluated at a tropical 89.6°F (32°C). Persisting in activity during exposure could lead to weariness and subsequently to heat cramps.
Know that the heat index computations account for shaded terrains and slight winds. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.

Humidity

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

Rainfall

The month with the most rainfall in Rio Vista is August, when the rain falls for 17 days and typically aggregates up to 4.17" (106mm) of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

The average length of the day in August is 13h and 38min.
On the first day of the month, sunrise is at 6:06 am and sunset at 8:15 pm. On the last day of August, in Rio Vista, sunrise is at 6:33 am and sunset at 7:36 pm EDT.

Sunshine

In Rio Vista, Maryland, the average sunshine in August is 10.6h.

UV index

The months with the highest UV index in Rio Vista are May through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: In August, a regular UV index of 6 translates into these guidelines:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
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Frequently asked questions

How hot does it get in Rio Vista in August?

The high-temperature, in August, in Rio Vista, is 82.9°F (28.3°C), while the low-temperature averages to 70.3°F (21.3°C). In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines relative humidity and air temperature, is evaluated at 89.6°F (32°C).

What is the average humidity in August in Rio Vista?

In August, the average relative humidity is 76%.

What is the wettest month in Rio Vista?

August is the month with the most rainfall in Rio Vista, Maryland. Rain falls for 17 days and accumulates 4.17" (106mm) of precipitation.

How many days does it rain in August in Rio Vista?

In Rio Vista, in August, it is raining for 17 days, with typically 4.17" (106mm) of accumulated precipitation.

When it does not snow in Rio Vista?

May through October are months without snowfall.

How many hours of daylight does Rio Vista have in August?

In Rio Vista, the average day length in August is 13h and 38min.

When is the sunrise / sunset in August in Rio Vista?

In August, on the first day of the month, sunrise is at 6:06 am and sunset at 8:15 pm. On the last day of the month, in Rio Vista, Maryland, sunrise is at 6:33 am and sunset at 7:36 pm EDT.

How long on average sun shines in August in Rio Vista?

The average sunshine duration in August in Rio Vista, Maryland, is 10.6h.

What are the months with the highest UV index in Rio Vista?

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 Rio Vista?

In Rio Vista, the average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes a high health threat from unsafe 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
Rio Vista, MD

Average temperature in August - Rio Vista, MD
  • Average high temperature in August: 82.9°F

The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (40.5°F).

  • Average low temperature in August: 70.3°F

The month with the highest average low temperature is July (71.8°F).
The coldest month (with the lowest average low temperature) is January (30°F).

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Average pressure in August
Rio Vista, MD

Average pressure in August - Rio Vista, MD
  • Average pressure in August: 29.99"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in August
Rio Vista, MD

Average wind speed in August - Rio Vista, MD
  • Average wind speed in August: 6.6mph

The windiest months (with the highest average wind speed) are February and March (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

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Average humidity in August
Rio Vista, MD

Average humidity in August - Rio Vista, MD
  • Average humidity in August: 76%

The month with the highest relative humidity is May (79%).
The months with the lowest relative humidity are January and November (73%).

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Average rainfall in August
Rio Vista, MD

Average rainfall in August - Rio Vista, MD
  • Average rainfall in August: 4.17"

The wettest month (with the highest rainfall) is August (4.17").
The driest month (with the least rainfall) is January (1.93").

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Average rainfall days in August
Rio Vista, MD

Average rainfall days in August - Rio Vista, MD
  • Average rainfall days in August: 17 days

The month with the highest number of rainy days is May (17.2 days).
The months with the least rainy days are January and November (8.8 days).

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Average snowfall in August
Rio Vista, MD

Average snowfall in August - Rio Vista, MD
  • Average snowfall in August: 0"

The month with the highest snowfall is March (1.22").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in August
Rio Vista, MD

Average snowfall days in August - Rio Vista, MD
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (3.2 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
Rio Vista, MD

Average daylight in August / Average sunshine in August - Rio Vista, MD
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in August: 10h and 4min

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 12min).

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Average sunshine days in August
Rio Vista, MD

Average sunshine days in August - Rio Vista, MD
  • Average sunshine days in August: 11.8 days

The month with the most sunshine days is November (19.7 days).
The months with the least sunshine days are May and August (11.8 days).

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Average UV index in August
Rio Vista, MD

Average UV index in August - Rio Vista, 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
Rio Vista, MD

Average cloud cover in August - Rio Vista, MD
  • Average cloud cover in August: 28

The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 27).

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Average visibility in August
Rio Vista, MD

Average visibility in August - Rio Vista, 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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Rio Vista, Maryland, USA

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