August weather forecast
Riverton, WY

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Weather in August

August in Riverton brings about slight reductions in temperature compared to July, but it still ranks among the warmer months of the year. With the rainfall remaining low and the daylight hours still relatively prolonged, summer holds its grip firm. However, the keen observer can notice the early signs of autumn's approach - longer shadows and slightly cooler winds. Straddling the line between summer at its peak and the unmistakable onset of fall, August offers an interesting weather mix in Riverton. This month hosts the interesting play between the scorching heat of the day and the cooler evening breezes.

Temperature

The beginning of August reveals an average high-temperature of a warm 84.9°F (29.4°C), showing minimal deviation from the previous month. Riverton documents a marked decrease from day to night, with an average low of 60.3°F (15.7°C) throughout August.

Humidity

The months with the lowest humidity are July and August, with an average relative humidity of 31%.

Rainfall

In Riverton, in August, during 6.3 rainfall days, 0.31" (8mm) of precipitation is typically accumulated. In Riverton, during the entire year, the rain falls for 67.3 days and collects up to 6.93" (176mm) of precipitation.

Snowfall

June through August are months without snowfall.

Daylight

In August, the average length of the day is 13h and 53min.
On the first day of August, sunrise is at 6:05 am and sunset at 8:34 pm. On the last day of the month, sunrise is at 6:37 am and sunset at 7:49 pm MDT.

Sunshine

In Riverton, the average sunshine in August is 11.9h.

UV index

In Riverton, the average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum daily UV index of 6 in August interprets into the following recommendations:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Updated: Jun 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it hot during August?

The average high-temperature, in August, in Riverton, is 84.9°F (29.4°C), while the average low-temperature is 60.3°F (15.7°C).

What are the least humid months?

The months with the lowest humidity are July and August, with an average relative humidity of 31%.

What is the average humidity in August?

In Riverton, the average relative humidity in August is 31%.

How many days does it rain in August?

In Riverton, in August, during 6.3 rainfall days, 0.31" (8mm) of precipitation is typically accumulated.

When it does not snow?

June through August are months without snowfall.

Does it snow in August?

In Riverton, in August, it doesn't snow. In September, it regularly snows.

How many hours of daylight does Riverton have in August?

In August, the average day length is 13h and 53min.

What time are sunrise and sunset in August?

In August, on the first day of the month, sunrise is at 6:05 am and sunset at 8:34 pm. On the last day of the month, sunrise is at 6:37 am and sunset at 7:49 pm MDT.

How long on average sun shines in August in Riverton?

In Riverton, the average sunshine duration in August is 11.9h.

How high is the UV index in August?

The average daily maximum UV index in August is 6. A UV Index of 6 to 7 symbolizes a high health threat from 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
Riverton, WY

Average temperature in August - Riverton, WY
  • Average high temperature in August: 84.9°F

The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is December (30.9°F).

  • Average low temperature in August: 60.3°F

The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (14.5°F).

Average pressure in August
Riverton, WY

Average pressure in August - Riverton, WY
  • Average pressure in August: 29.96"Hg

The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

Average wind speed in August
Riverton, WY

Average wind speed in August - Riverton, WY
  • Average wind speed in August: 6.3mph

The windiest month (with the highest average wind speed) is June (7.5mph).
The calmest month (with the lowest average wind speed) is January (5.5mph).

Average humidity in August
Riverton, WY

Average humidity in August - Riverton, WY
  • Average humidity in August: 31%

The month with the highest relative humidity is January (77%).
The months with the lowest relative humidity are July and August (31%).

Average rainfall in August
Riverton, WY

Average rainfall in August - Riverton, WY
  • Average rainfall in August: 0.31"

The wettest month (with the highest rainfall) is May (1.42").
The driest month (with the least rainfall) is January (0.24").

Average rainfall days in August
Riverton, WY

Average rainfall days in August - Riverton, WY
  • Average rainfall days in August: 6.3 days

The month with the highest number of rainy days is May (9.9 days).
The month with the least rainy days is January (2.5 days).

Average snowfall in August
Riverton, WY

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

The month with the highest snowfall is April (5.39").
The months with the least snowfall are June, July and August (0").

Average snowfall days in August
Riverton, WY

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

The month with the highest number of snowfall days is February (7.8 days).
The months with the least snowfall days are July and August (0 days).

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

Average daylight in August / Average sunshine in August - Riverton, WY
  • Average daylight in August: 13h and 5min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in August: 11h and 5min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 6h and 36min).

Average sunshine days in August
Riverton, WY

Average sunshine days in August - Riverton, WY
  • Average sunshine days in August: 18.9 days

The month with the most sunshine days is January (24.5 days).
The month with the least sunshine days is April (15.5 days).

Average UV index in August
Riverton, WY

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

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in August
Riverton, WY

Average cloud cover in August - Riverton, WY
  • Average cloud cover in August: 12

The months with the most cloud cover are February and April (Cloud cover 28).
The months with the least cloud cover are July and August (Cloud cover 12).

Average visibility in August
Riverton, WY

Average visibility in August - Riverton, WY
  • 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, Wyoming, USA

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