August weather forecast and climate
Cheyenne, WY

A sunny day in front of the State Capitol building in Cheyenne, Wyoming
A sunny day in front of the State Capitol building in Cheyenne, Wyoming

Weather in August

The last month of the summer, August, is another warm month in Cheyenne, Wyoming, with temperature in the range of an average low of 58.5°F (14.7°C) and an average high of 81.1°F (27.3°C).

Temperature

In August, the average high-temperature is essentially the same as in July - a still warm 81.1°F (27.3°C). The average low-temperature, in Cheyenne, Wyoming, is 58.5°F (14.7°C).

Heat index

The average heat index in August is calculated to 81.1°F (27.3°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
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 'feels like', 'real feel', 'felt air temperature', or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like activity, clothing, metabolic differences, and differences in body mass, height, and shape affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, 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

August is the least humid month, with an average relative humidity of 43%.

Rainfall

In Cheyenne, Wyoming, in August, it is raining for 11.7 days, with typically 0.83" (21mm) of accumulated precipitation. Throughout the year, there are 116 rainfall days, and 14.57" (370mm) of precipitation is accumulated.

Snowfall

In Cheyenne snow does not fall in June through September.

Daylight

In Cheyenne, the average length of the day is 13.8h.

Sunshine

July and August, with an average of 11.6h of sunshine, are months with the most sunshine.

UV index

July and August, with an average maximum UV index of 6, are months with the highest UV index in Cheyenne, Wyoming. A UV Index of 6 to 7 symbolizes a high health hazard from the exposure to the Sun's UV rays for ordinary individuals.
Note: In August, the average maximum UV index of 6 translate into the following recommendations:
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.
[Resources]

FAQ

What is the temperature in August in Cheyenne?

In August, in Cheyenne, Wyoming, the average high-temperature is 81.1°F (27.3°C), and the average low-temperature is 58.5°F (14.7°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), that takes the relative humidity and factores it into the air temperature reading, in August is calculated to 81.1°F (27.3°C).

What is the least humid month in Cheyenne?

The least humid month in Cheyenne is August, with an average relative humidity of 43%.

What is the average humidity in August in Cheyenne?

In Cheyenne, the average relative humidity in August is 43%.

How much does it rain in Cheyenne in August?

In Cheyenne, Wyoming, in August, it is raining for 11.7 days, with typically 0.83" (21mm) of accumulated precipitation.

When it does not snow in Cheyenne?

In Cheyenne snow does not fall in June through September.

How many hours of daylight does Cheyenne have in August?

The average length of the day in August in Cheyenne is 13.8h.

What are the months with the most sunshine in Cheyenne?

July and August, with an average of 11.6h of sunshine, are months with the most sunshine in Cheyenne, Wyoming.

How long on average sun shines in August in Cheyenne?

The average sunshine in August in Cheyenne is 11.6h.

What is the month with the highest UV index in Cheyenne?

Months with the highest UV index in Cheyenne are July and August, with an average maximum UV index of 6.

What is the UV index reading in August in Cheyenne?

In Cheyenne, the average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes a high hazard to health from the exposure to the Sun's UV rays.

Average temperature in August
Cheyenne, WY

Average temperature in August - Cheyenne, WY
  • Average high temperature in August: 81.1°F

The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is December (34.7°F).

  • Average low temperature in August: 58.5°F

The month with the highest average low temperature is July (59.9°F).
The coldest month (with the lowest average low temperature) is December (20.3°F).

[Resources]

Average pressure in August
Cheyenne, WY

Average pressure in August - Cheyenne, WY
  • Average pressure in August: 29.95"

The month with the highest atmospheric pressure is January (30.14").
The month with the lowest atmospheric pressure is June (29.87").

[Resources]

Average wind speed in August
Cheyenne, WY

Average wind speed in August - Cheyenne, WY
  • Average wind speed in August: 8.7mph

The windiest month (with the highest average wind speed) is January (14.2mph).
The calmest month (with the lowest average wind speed) is August (8.7mph).

[Resources]

Average humidity in August
Cheyenne, WY

Average humidity in August - Cheyenne, WY
  • Average humidity in August: 43%

The month with the highest relative humidity is February (64%).
The month with the lowest relative humidity is August (43%).

[Resources]

Average rainfall in August
Cheyenne, WY

Average rainfall in August - Cheyenne, WY
  • Average rainfall in August: 0.83"

The wettest month (with the highest rainfall) is May (2.95").
The driest month (with the least rainfall) is January (0.43").

[Resources]

Average rainfall days in August
Cheyenne, WY

Average rainfall days in August - Cheyenne, WY
  • Average rainfall days in August: 11.7 days

The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (4.7 days).

[Resources]

Average snowfall in August
Cheyenne, WY

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

The month with the highest snowfall is March (6.06").
Months with the least snowfall are June, July, August and September (0").

[Resources]

Average snowfall days in August
Cheyenne, WY

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

The month with the highest number of snowfall days is February (11.3 days).
Months with the least snowfall days are June, July and August (0 days).

[Resources]

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

Average daylight in August / Average sunshine in August - Cheyenne, WY
  • Average daylight in August: 13.8h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in August: 11.6h

Months with the most sunshine are July and August (Average sunshine: 11.6h).
The month with the least sunshine is February (Average sunshine: 6.5h).

[Resources]

Average sunshine days in August
Cheyenne, WY

Average sunshine days in August - Cheyenne, WY
  • Average sunshine days in August: 15.5 days

The month with the most sunshine days is January (20.7 days).
The month with the least sunshine days is April (9.3 days).

[Resources]

Average UV index in August
Cheyenne, WY

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

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

[Resources]

Average cloud cover in August
Cheyenne, WY

Average cloud cover in August - Cheyenne, WY
  • Average cloud cover in August: 19

Months with the most cloud cover are April and May (Cloud cover 32).
The month with the least cloud cover is September (Cloud cover 18).

[Resources]

Average visibility in August
Cheyenne, WY

Average visibility in August - Cheyenne, WY
  • 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).

[Resources]