August weather forecast
Riverton, IA

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Weather in August

The last month of the summer, August, is another warm month in Riverton, Iowa, with an average temperature ranging between max 82.2°F (27.9°C) and min 63.7°F (17.6°C).

Temperature

As Riverton steps into August, the average high-temperature is measured at a still warm 82.2°F (27.9°C), displaying minor differences from July's 84°F (28.9°C). Throughout the month of August, Riverton observes an average nighttime temperature of 63.7°F (17.6°C).

Heat index

The heat index in August is estimated at a hot 89.6°F (32°C). If one continues to be active during enduring exposure, it could result in fatigue and heat cramps.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', blends air temperature and moisture content to represent the felt temperature to humans. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.

Humidity

In Riverton, Iowa, the average relative humidity in August is 78%.

Rainfall

In Riverton, during August, the rain falls for 12.8 days and regularly aggregates up to 2.6" (66mm) of precipitation. In Riverton, during the entire year, the rain falls for 125.6 days and collects up to 26.14" (664mm) of precipitation.

Snowfall

In Riverton, snow does not fall in May through September.

Daylight

In Riverton, the average length of the day in August is 13h and 44min.
On the first day of August, sunrise is at 6:19 am and sunset at 8:37 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 7:55 pm CDT.

Sunshine

In August, the average sunshine is 9.9h.

UV index

June 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 threat to health from exposure to the Sun's UV radiation for average individuals.
Note: In August, an average UV index of 6 transforms into the following instructions:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. 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. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Riverton in August?

The average high-temperature and low-temperature during August are 82.2°F (27.9°C) and 63.7°F (17.6°C) respectively. In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, is estimated at 89.6°F (32°C).

What is the average humidity in August in Riverton?

In August, the average relative humidity in Riverton, Iowa, is 78%.

How many days does it rain in August in Riverton?

In August, in Riverton, Iowa, the rain falls for 12.8 days. Throughout August, 2.6" (66mm) of precipitation is accumulated.

When it does not snow in Riverton?

In Riverton, Iowa, snow does not fall in May through September.

What is the average length of the day in August in Riverton?

In August, the average day length is 13h and 44min.

When is the sunrise / sunset in August in Riverton?

In August, on the first day of the month, sunrise is at 6:19 am and sunset at 8:37 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 7:55 pm CDT.

How many hours of sunshine does Riverton have in August?

In August, the average sunshine duration is 9.9h.

What are the months with the highest UV index in Riverton?

June through August, with an average maximum UV index of 6, are months with the highest UV index in Riverton.

What is the UV index intensity in August in Riverton?

In August, the average daily maximum UV index in Riverton, Iowa, is 6. A UV Index estimate of 6 to 7 represents a high health threat from unprotected exposure to 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
Riverton, IA

Average temperature in August - Riverton, IA
  • Average high temperature in August: 82.2°F

The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (31.3°F).

  • Average low temperature in August: 63.7°F

The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (18°F).

Average pressure in August
Riverton, IA

Average pressure in August - Riverton, IA
  • Average pressure in August: 29.95"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

Average wind speed in August
Riverton, IA

Average wind speed in August - Riverton, IA
  • Average wind speed in August: 6.9mph

The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).

Average humidity in August
Riverton, IA

Average humidity in August - Riverton, IA
  • Average humidity in August: 78%

The months with the highest relative humidity are January and July (79%).
The month with the lowest relative humidity is October (67%).

Average rainfall in August
Riverton, IA

Average rainfall in August - Riverton, IA
  • Average rainfall in August: 2.6"

The wettest month (with the highest rainfall) is June (4.29").
The driest month (with the least rainfall) is February (0.71").

Average rainfall days in August
Riverton, IA

Average rainfall days in August - Riverton, IA
  • Average rainfall days in August: 12.8 days

The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (3.9 days).

Average snowfall in August
Riverton, IA

Average snowfall in August - Riverton, IA
  • Average snowfall in August: 0"

The month with the highest snowfall is January (3.11").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in August
Riverton, IA

Average snowfall days in August - Riverton, IA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (8.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in August /
Average sunshine in August
Riverton, IA

Average daylight in August / Average sunshine in August - Riverton, IA
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in August: 9h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).

Average sunshine days in August
Riverton, IA

Average sunshine days in August - Riverton, IA
  • Average sunshine days in August: 15.8 days

The month with the most sunshine days is November (20.8 days).
The month with the least sunshine days is June (11.8 days).

Average UV index in August
Riverton, IA

Average UV index in August - Riverton, IA
  • Average UV index in August: 6

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in August
Riverton, IA

Average cloud cover in August - Riverton, IA
  • Average cloud cover in August: 29

The month with the most cloud cover is January (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 26).

Average visibility in August
Riverton, IA

Average visibility in August - Riverton, IA
  • 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).

Riverton, Iowa, USA

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