Cheyenne
Wyoming, USA
Long-term weather forecast
Long-term weather forecast

August weather forecast and climate
Cheyenne, WY

A sunny day in the front of the State Capitol building in Cheyenne, Wyoming
A sunny day in the front of the State Capitol building in Cheyenne, Wyoming
August, the last month of the summer, in Cheyenne, is also a moderately hot month, with temperature in the range of an average high of 81.1°F (27.3°C) and an average low of 58.5°F (14.7°C).

Temperature

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

Heat index

The average heat index in August is estimated at 81.1°F (27.3°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. With the 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 'felt air temperature', 'feels like', 'apparent temperature', or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like activity, clothing, metabolic differences, and pregnancy 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 particularly important for children. 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

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

Rainfall

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

Snowfall

June through September are months without snowfall.

Daylight

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

Sunshine

Months with the most sunshine 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, Wyoming. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 6 transform into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

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', 'real feel'), that calculates temperature value influenced by the moisture in the air, 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, Wyoming, is August, with an average relative humidity of 43%.

What is the average humidity in August in Cheyenne?

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

How many days does it rain in August in Cheyenne?

In August, in Cheyenne, the rain falls for 11.7 days. Throughout August, 0.83" (21mm) of precipitation is accumulated.

When it does not snow in Cheyenne?

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

How many hours of daylight does Cheyenne have in August?

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

What is the month with the most sunshine in Cheyenne?

Months with the most sunshine 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 in August in Cheyenne, Wyoming, is 11.6h.

When is 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?

The average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high health threat from the exposure to the Sun's UV rays.
Average temperature in August - Cheyenne, WY
  • Average high temperature in August: 27.3°C

The warmest month (with the highest average high temperature) is July (28°C).
The month with the lowest average high temperature is December (1.5°C).

  • Average low temperature in August: 14.7°C

The month with the highest average low temperature is July (15.5°C).
The coldest month (with the lowest average low temperature) is December (-6.5°C).

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%).

Average rainfall in August - Cheyenne, WY
  • Average rainfall in August: 21mm

The wettest month (with the highest rainfall) is May (75mm).
The driest month (with the lowest rainfall) is January (11mm).

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 lowest number of rainy days is January (4.7 days).

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

The month with the highest snowfall is March (154mm).
Months with the lowest snowfall are June, July, August and September (0mm).

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 lowest number of snowfall days are June, July and August (0 days).

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 shortest days is December (Average daylight: 9.3h).

  • Average sunshine in August: 11.6h

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

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).