August weather forecast
Riverview, FL

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Weather in August

August, the last month of the summer in Riverview, is another hot month, with an average temperature fluctuating between 78.1°F (25.6°C) and 90.1°F (32.3°C).

Temperature

Temperature readings reach their annual highs in August, averaging 90.1°F (32.3°C) and a minimum average of 78.1°F (25.6°C).

Heat index

The heat index for August is calculated to be a scorching 109.4°F (43°C). Be on the lookout: Heat cramps and heat exhaustion are anticipated. Continued exertion can result in heatstroke.
Keep in mind the heat index values are meant for areas in shade and with light wind. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Juveniles are regularly less conscious of the need to recuperate and rehydrate. Thirst is a tardy symptom of dehydration - hydration, especially during lengthy physical activities, should be maintained.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. Elevated relative humidity disrupts typical body cooling by reducing the evaporation rate, consequently decreasing the body's cooling rate and enhancing the feeling of heat. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in August is 75%.

Rainfall

In Riverview, in August, it is raining for 21.3 days, with typically 2.17" (55mm) of accumulated precipitation. In Riverview, during the entire year, the rain falls for 148.4 days and collects up to 12.32" (313mm) of precipitation.

Daylight

The average length of the day in August is 13h and 6min.
On the first day of August, sunrise is at 6:52 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 7:50 pm EDT.

Sunshine

The average sunshine in August is 9.6h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the average person.
Note: The maximum UV index of 7 during August leads to these instructions:
Fend off overexposure. Sun protection is vital. 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. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Updated: Jun 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What time of the year is the hottest?

August is the month when Riverview's temperatures reach their peak, with averages of 90.1°F (32.3°C) and lows of 78.1°F (25.6°C).

How hot is it in August?

An average high-temperature, in August, in Riverview, is 90.1°F (32.3°C) and the average low-temperature is 78.1°F (25.6°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines relative humidity and air temperature, in August is calculated to be 109.4°F (43°C).

What is the average humidity in August?

In August, the average relative humidity is 75%.

How much does it rain in August?

In Riverview, in August, during 21.3 rainfall days, 2.17" (55mm) of precipitation is typically accumulated.

How many hours of daylight does Riverview have in August?

The average day length in August is 13h and 6min.

When is the sunrise / sunset in August?

On the first day of August, sunrise is at 6:52 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 7:50 pm EDT.

How many hours of sunshine does Riverview have in August?

In Riverview, the average sunshine duration in August is 9.6h.

When is the highest UV index?

May through September, with an average maximum UV index of 7, are months with the highest UV index.

How high is the UV index in August?

The average daily maximum UV index in August is 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Riverview, FL

Average temperature in August - Riverview, FL
  • Average high temperature in August: 90.1°F

The warmest month (with the highest average high temperature) is August (90.1°F).
The month with the lowest average high temperature is January (68.5°F).

  • Average low temperature in August: 78.1°F

The month with the highest average low temperature is August (78.1°F).
The coldest month (with the lowest average low temperature) is January (52.7°F).

Average pressure in August
Riverview, FL

Average pressure in August - Riverview, FL
  • Average pressure in August: 29.98"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.96"Hg).

Average wind speed in August
Riverview, FL

Average wind speed in August - Riverview, FL
  • Average wind speed in August: 5.7mph

The windiest month (with the highest average wind speed) is March (7.6mph).
The calmest month (with the lowest average wind speed) is July (5.4mph).

Average humidity in August
Riverview, FL

Average humidity in August - Riverview, FL
  • Average humidity in August: 75%

The months with the highest relative humidity are September and December (76%).
The months with the lowest relative humidity are March and May (70%).

Average rainfall in August
Riverview, FL

Average rainfall in August - Riverview, FL
  • Average rainfall in August: 2.17"

The wettest month (with the highest rainfall) is July (2.48").
The driest month (with the least rainfall) is March (0.24").

Average rainfall days in August
Riverview, FL

Average rainfall days in August - Riverview, FL
  • Average rainfall days in August: 21.3 days

The month with the highest number of rainy days is July (22.8 days).
The month with the least rainy days is January (4.9 days).

Average daylight in August /
Average sunshine in August
Riverview, FL

Average daylight in August / Average sunshine in August - Riverview, FL
  • Average daylight in August: 13h and 1min

The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).

  • Average sunshine in August: 9h and 4min

The month with the most sunshine is May (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).

Average sunshine days in August
Riverview, FL

Average sunshine days in August - Riverview, FL
  • Average sunshine days in August: 5.9 days

The month with the most sunshine days is January (24.2 days).
The month with the least sunshine days is July (4.7 days).

Average UV index in August
Riverview, FL

Average UV index in August - Riverview, FL
  • Average UV index in August: 7

The months with the highest UV index are May, June, July, August and September (UV index 7).
The month with the lowest UV index is January (UV index 4).

Average cloud cover in August
Riverview, FL

Average cloud cover in August - Riverview, FL
  • Average cloud cover in August: 28

The months with the most cloud cover are January and December (Cloud cover 31).
The month with the least cloud cover is May (Cloud cover 23).

Average visibility in August
Riverview, FL

Average visibility in August - Riverview, FL
  • 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).

Riverview, Florida, USA

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