August weather forecast
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

August, the last month of the summer in Cheyenne, is also a moderately hot month, with an average temperature ranging between max 81.1°F (27.3°C) and min 58.5°F (14.7°C).

Temperature

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

Heat index

The average heat index in August is appraised at 80.6°F (27°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'feels like', 'felt air temperature', or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like activity, wind, metabolic differences, and pregnancy affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

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

Rainfall

In August, in Cheyenne, the rain falls for 11.7 days. Throughout August, 0.83" (21mm) of precipitation is accumulated. In Cheyenne, during the entire year, the rain falls for 116 days and collects up to 14.57" (370mm) of precipitation.

Snowfall

In Cheyenne, snow does not fall in June through September.

Daylight

In Cheyenne, Wyoming, the average length of the day in August is 13h and 46min.
On the first day of the month, sunrise is at 5:55 am and sunset at 8:16 pm. On the last day of August, in Cheyenne, sunrise is at 6:24 am and sunset at 7:34 pm MDT.

Sunshine

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

UV index

July and August, with an average maximum UV index of 6, are months with the highest UV index in Cheyenne. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 6 in August transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in August in Cheyenne?

The average high-temperature, in August, in Cheyenne, Wyoming, is 81.1°F (27.3°C), while the average low-temperature is 58.5°F (14.7°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which represents the influence of relative humidity on air temperature, in August is appraised at 80.6°F (27°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?

The average relative humidity in August in Cheyenne is 43%.

How many days does it rain in August in Cheyenne?

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?

June through September are months without snowfall in Cheyenne, Wyoming.

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

In August, the average day length is 13h and 46min.

What time are sunrise and sunset in August in Cheyenne?

On the first day of August in Cheyenne, Wyoming, sunrise is at 5:55 am and sunset at 8:16 pm. On the last day of the month, sunrise is at 6:24 am and sunset at 7:34 pm MDT.

What is the month with the most sunshine in Cheyenne?

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

How many hours of sunshine does Cheyenne have in August?

The average sunshine duration in August in Cheyenne, Wyoming, is 11.6h.

When is the highest UV index in Cheyenne?

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

How high is the UV index in August in Cheyenne?

In Cheyenne, Wyoming, the average daily maximum UV index in August is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

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).

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Average pressure in August
Cheyenne, WY

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

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

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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).

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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%).

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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").

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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).

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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").
The months with the least snowfall are June, July, August and September (0").

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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).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in August / Average sunshine in August - Cheyenne, WY
  • Average daylight in August: 13h and 46min

The month with the longest days is June (Average daylight: 15h and 5min).
The month with the shortest days is December (Average daylight: 9h and 16min).

  • Average sunshine in August: 11h and 36min

The months with the most sunshine are July and August (Average sunshine: 11h and 36min).
The month with the least sunshine is February (Average sunshine: 6h and 30min).

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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).

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Average UV index in August
Cheyenne, WY

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

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

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Average cloud cover in August
Cheyenne, WY

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

The 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).

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Average visibility in August
Cheyenne, WY

Average visibility in August - Cheyenne, 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).

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