August weather forecast
Cheyenne, WY

Share
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 serves as a gentle reminder that summer is not perpetual as the temperature begins to fall slightly, yet it still remains quite warm. In August, Cheyenne boasts the lowest average cloud cover of 19%, proposing clear skies and extended sunshine. Farmers' markets abound, the sunshine complementing the vibrant produce and the cheerful chatter. Residents make the most of the remaining summer days, the weather providing ample opportunities for outdoor adventures.

Temperature

In August, Cheyenne experiences a minor shift in meteorological conditions with average high-temperatures marked at a still warm 81.1°F (27.3°C), closely mirroring the climate in July. Cheyenne logs a substantial downturn to a mild 58.5°F (14.7°C) during August nights, a considerable shift from daytime highs.

Heat index

For most parts of August, the heat index is estimated at 80.6°F (27°C). If one continues to be active during exposure, it might cause tiredness and subsequent heat cramps.
Be aware that heat index ratings are designed for shaded locations and minor breezes. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', is a numerical representation of warmth when taking temperature and moisture levels into account. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.

Humidity

With an average relative humidity of 43%, August is the least humid month in Cheyenne, Wyoming.

Rainfall

In Cheyenne, 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

June through September are months without snowfall.

Daylight

In August, the average length of the day is 13h and 46min.
On the first day of the month, sunrise is at 5:55 am and sunset at 8:15 pm. On the last day of August, sunrise is at 6:25 am and sunset at 7:33 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

The months with the highest UV index in Cheyenne are July and August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the average person.
Note: A daily high UV index of 6 in August leads to these guidelines:
Prevent overexposure. Protection from the sun's harmful effects is needed. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
[Resources]

Frequently asked questions

What is the temperature in August in Cheyenne?

The high-temperature, in August, in Cheyenne, is 81.1°F (27.3°C), while the low-temperature averages to 58.5°F (14.7°C). 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, in August is estimated at 80.6°F (27°C).

What is the least humid month in Cheyenne?

With an average relative humidity of 43%, August is the least humid month in Cheyenne, Wyoming.

What is the average humidity in August in Cheyenne?

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

How much does it rain in Cheyenne in August?

In Cheyenne, Wyoming, during August, the rain falls for 11.7 days and regularly aggregates up to 0.83" (21mm) of precipitation.

When it does not snow in Cheyenne?

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

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

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

What time are sunrise and sunset in August in Cheyenne?

In August, on the first day of the month, sunrise is at 5:55 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 6:25 am and sunset at 7:33 pm MDT.

What is the month 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.

How long on average sun shines in August in Cheyenne?

In Cheyenne, the average sunshine duration in August is 11.6h.

When is the highest UV index in Cheyenne?

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

What is the UV index intensity in August in Cheyenne?

In Cheyenne, the average daily maximum UV index in August is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability 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
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"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).

[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").
The 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).
The 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: 13h and 5min

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

  • Average sunshine in August: 11h and 4min

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).

[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

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).

[Resources]

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).

[Resources]

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).

[Resources]

Cheyenne, Wyoming, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location