August weather forecast
Guernsey, WY

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Weather in August

August in Guernsey, Wyoming continues the summer trend with average high temperatures around 85.6°F (29.8°C) and a slight decrease in rainfall compared to July. The month keeps the momentum of the summer warmth, albeit with a gradual decrease in sunshine hours and daylight, indicating the subtle shift towards autumn. Despite the progressive decline of summer, August retains much of its allure with clear skies and warm sunshine. With the dwindling summer days, locals and tourists alike can still enjoy a host of outdoor activities in the city. The month finalizes the summer chapter while beginning to hint towards autumn.

Temperature

Entering August, Guernsey's average high-temperature reads a warm 85.6°F (29.8°C), indicating a close resemblance to the previous month's climate. The month of August sees a significant daily temperature drop, recording an average low-temperature of 61.2°F (16.2°C).

Humidity

With an average relative humidity of 39%, August is the least humid month.

Rainfall

In Guernsey, in August, it is raining for 9.1 days, with typically 0.75" (19mm) of accumulated precipitation. In Guernsey, during the entire year, the rain falls for 90.8 days and collects up to 11.57" (294mm) of precipitation.

Snowfall

In Guernsey, snow does not fall in June through August.

Daylight

In August, the average length of the day in Guernsey is 13h and 50min.
On the first day of August, sunrise is at 5:52 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 6:24 am and sunset at 7:33 pm MDT.

Sunshine

The average sunshine in August is 11.7h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index in Guernsey, Wyoming. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: A daily maximum UV index of 6 in August translates into the following instructions:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Stay sun-safe with clothing that is both closely woven and worn loosely.
Updated: Aug 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it hot during August?

In August, the average high-temperature and low-temperature are 85.6°F (29.8°C) and 61.2°F (16.2°C) respectively. The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in July is estimated at 87.8°F (31°C).

What is the least humid month?

August is the least humid month, with an average relative humidity of 39%.

What is the average humidity in August?

In Guernsey, the average relative humidity in August is 39%.

How much does it rain in August?

In August, the rain falls for 9.1 days. Throughout August, 0.75" (19mm) of precipitation is accumulated.

When it does not snow?

June through August are months without snowfall.

Does it snow in August?

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

How many hours of daylight does Guernsey have in August?

The average day length in August is 13h and 50min.

When are sunrise and sunset in August?

On the first day of August, sunrise is at 5:52 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 6:24 am and sunset at 7:33 pm MDT.

How long on average sun shines in August?

In August, the average sunshine duration is 11.7h.

What are the months with the highest UV index?

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

What is the UV index intensity in August?

The average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high health risk 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
Guernsey, WY

Average temperature in August - Guernsey, WY
  • Average high temperature in August: 85.6°F

The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is December (35.1°F).

  • Average low temperature in August: 61.2°F

The month with the highest average low temperature is July (62.8°F).
The coldest months (with the lowest average low temperature) are February and December (21.6°F).

Average pressure in August
Guernsey, WY

Average pressure in August - Guernsey, WY
  • Average pressure in August: 29.92"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

Average wind speed in August
Guernsey, WY

Average wind speed in August - Guernsey, WY
  • Average wind speed in August: 8.6mph

The windiest month (with the highest average wind speed) is January (15mph).
The calmest month (with the lowest average wind speed) is August (8.6mph).

Average humidity in August
Guernsey, WY

Average humidity in August - Guernsey, WY
  • Average humidity in August: 39%

The month with the highest relative humidity is February (66%).
The month with the lowest relative humidity is August (39%).

Average rainfall in August
Guernsey, WY

Average rainfall in August - Guernsey, WY
  • Average rainfall in August: 0.75"

The wettest month (with the highest rainfall) is May (1.97").
The driest month (with the least rainfall) is January (0.35").

Average rainfall days in August
Guernsey, WY

Average rainfall days in August - Guernsey, WY
  • Average rainfall days in August: 9.1 days

The month with the highest number of rainy days is May (12.7 days).
The month with the least rainy days is January (3.6 days).

Average snowfall in August
Guernsey, WY

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

The month with the highest snowfall is April (4.45").
The months with the least snowfall are June, July and August (0").

Average snowfall days in August
Guernsey, WY

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

The month with the highest number of snowfall days is February (8.3 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in August / Average sunshine in August - Guernsey, WY
  • Average daylight in August: 13h and 5min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in August: 11h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The months with the least sunshine are February and December (Average sunshine: 6h and 36min).

Average sunshine days in August
Guernsey, WY

Average sunshine days in August - Guernsey, WY
  • Average sunshine days in August: 17.5 days

The month with the most sunshine days is January (21.9 days).
The month with the least sunshine days is April (14.5 days).

Average UV index in August
Guernsey, WY

Average UV index in August - Guernsey, 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, November and December (UV index 2).

Average cloud cover in August
Guernsey, WY

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

The month with the most cloud cover is April (Cloud cover 31).
The months with the least cloud cover are August and September (Cloud cover 16).

Average visibility in August
Guernsey, WY

Average visibility in August - Guernsey, 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).

Guernsey, Wyoming, USA

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