August weather forecast
Gillette, WY

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Weather in August

The heat of summer in Gillette continues its reign through August, although with slightly lower temperatures than July. As the sun dominates the sky, visitors can explore the myriad landscapes Gillette has to offer. Though the rainfall is not noticeably high, the month witnesses frequent warm showers usually in the evenings. Additionally, pressure patterns remain relatively steady throughout August. Its no surprise that this time is popular for outdoor festivals and concerts, capturing the city in its liveliest form.

Temperature

As Gillette welcomes August, the average high-temperature stabilizes at a still moderately hot 82.4°F (28°C), showing little deviation from July's 84.7°F (29.3°C). Throughout August, the nighttime temperature averages to a refreshing 62.4°F (16.9°C).

Heat index

For August, the heat index is computed to be 82.4°F (28°C). Long-lasting exposure and activity potentially induce a sense of weariness, with the risk of heat cramps.
Records show heat index calculations are tailored for shaded regions and mild winds. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. 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. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.

Humidity

The least humid month is August, with an average relative humidity of 41%.

Rainfall

In Gillette, in August, it is raining for 14.2 days, with typically 1.73" (44mm) of accumulated precipitation. Throughout the year, in Gillette, there are 108.9 rainfall days, and 15.59" (396mm) of precipitation is accumulated.

Snowfall

June through August are months without snowfall in Gillette.

Daylight

In Gillette, Wyoming, the average length of the day in August is 13h and 58min.
On the first day of the month, sunrise is at 5:50 am and sunset at 8:26 pm. On the last day of August, in Gillette, sunrise is at 6:24 am and sunset at 7:39 pm MDT.

Sunshine

The months with the most sunshine in Gillette are July and August, with an average of 11.8h of sunshine.

UV index

The months with the highest UV index in Gillette are June through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The daily high UV index of 6 during August translates into the following recommendations:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete 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.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is August in Gillette?

The average high-temperature, in August, in Gillette, is 82.4°F (28°C), while the average low-temperature is 62.4°F (16.9°C). In August, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which represents the influence of relative humidity on air temperature, is computed to be 82.4°F (28°C).

What is the least humid month in Gillette?

With an average relative humidity of 41%, August is the least humid month in Gillette.

What is the average humidity in August in Gillette?

In August, the average relative humidity in Gillette, Wyoming, is 41%.

How many days does it rain in August in Gillette?

In Gillette, in August, it is raining for 14.2 days, with typically 1.73" (44mm) of accumulated precipitation.

When it does not snow in Gillette?

June through August are months without snowfall in Gillette.

Does it snow in Gillette in August?

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

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

The average day length in August is 13h and 58min.

When is the sunrise / sunset in August in Gillette?

On the first day of August in Gillette, sunrise is at 5:50 am and sunset at 8:26 pm. On the last day of the month, sunrise is at 6:24 am and sunset at 7:39 pm MDT.

What is the month with the most sunshine in Gillette?

The months with the most sunshine in Gillette, Wyoming, are July and August, with an average of 11.8h of sunshine.

How long on average sun shines in August in Gillette?

The average sunshine duration in August is 11.8h.

When is the highest UV index in Gillette?

June through August, with an average maximum UV index of 6, are months with the highest UV index.

What is the UV index reading in August in Gillette?

In August, the average daily maximum UV index in Gillette 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
Gillette, WY

Average temperature in August - Gillette, WY
  • Average high temperature in August: 82.4°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is December (29.7°F).

  • Average low temperature in August: 62.4°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is February (16.7°F).

Average pressure in August
Gillette, WY

Average pressure in August - Gillette, WY
  • Average pressure in August: 29.89"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

Average wind speed in August
Gillette, WY

Average wind speed in August - Gillette, WY
  • Average wind speed in August: 9.1mph

The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest months (with the lowest average wind speed) are July and August (9.1mph).

Average humidity in August
Gillette, WY

Average humidity in August - Gillette, WY
  • Average humidity in August: 41%

The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is August (41%).

Average rainfall in August
Gillette, WY

Average rainfall in August - Gillette, WY
  • Average rainfall in August: 1.73"

The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is January (0.39").

Average rainfall days in August
Gillette, WY

Average rainfall days in August - Gillette, WY
  • Average rainfall days in August: 14.2 days

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is February (1.5 days).

Average snowfall in August
Gillette, WY

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

The month with the highest snowfall is April (3.82").
The months with the least snowfall are June, July and August (0").

Average snowfall days in August
Gillette, WY

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

The month with the highest number of snowfall days is February (9.1 days).
The months with the least snowfall days are July and August (0 days).

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

Average daylight in August / Average sunshine in August - Gillette, WY
  • Average daylight in August: 14h and 0min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in August: 11h and 5min

The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 36min).

Average sunshine days in August
Gillette, WY

Average sunshine days in August - Gillette, WY
  • Average sunshine days in August: 12.2 days

The month with the most sunshine days is December (22.4 days).
The month with the least sunshine days is May (9.3 days).

Average UV index in August
Gillette, WY

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

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

Average cloud cover in August
Gillette, WY

Average cloud cover in August - Gillette, WY
  • Average cloud cover in August: 16

The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 16).

Average visibility in August
Gillette, WY

Average visibility in August - Gillette, 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).

Gillette, Wyoming, USA

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