August weather forecast
Agat, GU

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Weather in August

August carries forward the weather profile of July in Agat, with high rainfall and temperature. This wet period reaches its maximum in August as the rainfall measures up to a significant 9.76" (248mm). Despite the increased rainfall, the town’s visitors enjoy the local attractions amid the tropical temperatures. As the island moves towards September, there is a slight decrease in temperature and rainfall, marking the tail end of the summer.

Temperature

Agat experiences the peak of its temperatures in July and August, when the average high-temperatures rise to 84.7°F (29.3°C).

Heat index

August's heat index is calculated to be a very hot 95°F (35°C). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
The heat index's values are generally associated with conditions in shade and light breezes. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

August is the least humid month, with an average relative humidity of 76%.

Rainfall

In Agat, in August, it is raining for 28.9 days, with typically 9.76" (248mm) of accumulated precipitation. Throughout the year, in Agat, there are 288.5 rainfall days, and 60.08" (1526mm) of precipitation is accumulated.

Daylight

In August, the average length of the day is 12h and 34min.
On the first day of the month, sunrise is at 6:06 am and sunset at 6:48 pm. On the last day of August, sunrise is at 6:09 am and sunset at 6:33 pm ChST.

Sunshine

In Agat, the average sunshine in August is 7.6h.

UV index

January through August, October through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.
Note: The maximum UV index of 7 during August leads to these instructions:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. 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.
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Frequently asked questions

What is the hottest time of year in Agat?

July and August, with an average high-temperature of 84.7°F (29.3°C), are marked as the warmest months in Agat.

How hot is it in Agat in August?

The average high-temperature and low-temperature during August are 84.7°F (29.3°C) and 82.4°F (28°C) respectively. In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines relative humidity and air temperature, is calculated to be 95°F (35°C).

What is the least humid month in Agat?

With an average relative humidity of 76%, August is the least humid month in Agat.

What is the average humidity in August in Agat?

In August, the average relative humidity in Agat, Guam, is 76%.

How many days does it rain in August in Agat?

In Agat, Guam, in August, it is raining for 28.9 days, with typically 9.76" (248mm) of accumulated precipitation.

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

In Agat, the average day length in August is 12h and 34min.

When is the sunrise / sunset in August in Agat?

In August, on the first day of the month, sunrise is at 6:06 am and sunset at 6:48 pm. On the last day of the month, in Agat, Guam, sunrise is at 6:09 am and sunset at 6:33 pm ChST.

How long on average sun shines in August in Agat?

The average sunshine duration in August in Agat is 7.6h.

What are the months with the highest UV index in Agat?

January through August, October through December, with an average maximum UV index of 7, are months with the highest UV index.

How high is the UV index in August in Agat?

In August, the average daily maximum UV index in Agat, Guam, is 7. A UV Index value of 6 to 7 symbolizes a high hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Agat, GU

Average temperature in August - Agat, GU
  • Average high temperature in August: 84.7°F

The warmest months (with the highest average high temperature) are July and August (84.7°F).
The month with the lowest average high temperature is February (81.7°F).

  • Average low temperature in August: 82.4°F

The month with the highest average low temperature is June (83.3°F).
The coldest month (with the lowest average low temperature) is February (79.7°F).

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Average pressure in August
Agat, GU

Average pressure in August - Agat, GU
  • Average pressure in August: 29.79"Hg

The month with the highest atmospheric pressure is February (29.88"Hg).
The months with the lowest atmospheric pressure are August, September and October (29.79"Hg).

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Average wind speed in August
Agat, GU

Average wind speed in August - Agat, GU
  • Average wind speed in August: 9.6mph

The windiest month (with the highest average wind speed) is February (16.3mph).
The calmest month (with the lowest average wind speed) is August (9.6mph).

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Average humidity in August
Agat, GU

Average humidity in August - Agat, GU
  • Average humidity in August: 76%

The months with the highest relative humidity are January, March, April, May, October, November and December (78%).
The month with the lowest relative humidity is August (76%).

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Average rainfall in August
Agat, GU

Average rainfall in August - Agat, GU
  • Average rainfall in August: 9.76"

The wettest month (with the highest rainfall) is September (10.28").
The driest month (with the least rainfall) is March (1.81").

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Average rainfall days in August
Agat, GU

Average rainfall days in August - Agat, GU
  • Average rainfall days in August: 28.9 days

The months with the highest number of rainy days are July and August (28.9 days).
The month with the least rainy days is February (17.5 days).

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Average daylight in August /
Average sunshine in August
Agat, GU

Average daylight in August / Average sunshine in August - Agat, GU
  • Average daylight in August: 12h and 4min

The month with the longest days is June (Average daylight: 12h and 54min).
The month with the shortest days is December (Average daylight: 11h and 24min).

  • Average sunshine in August: 7h and 4min

The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is November (Average sunshine: 6h and 18min).

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Average sunshine days in August
Agat, GU

Average sunshine days in August - Agat, GU
  • Average sunshine days in August: 1.6 days

The month with the most sunshine days is March (6.6 days).
The month with the least sunshine days is September (1.1 days).

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Average UV index in August
Agat, GU

Average UV index in August - Agat, GU
  • Average UV index in August: 7

The months with the highest UV index are January, February, March, April, May, June, July, August, October, November and December (UV index 7).
The month with the lowest UV index is September (UV index 6).

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Average cloud cover in August
Agat, GU

Average cloud cover in August - Agat, GU
  • Average cloud cover in August: 46

The months with the most cloud cover are January, August and October (Cloud cover 46).
The months with the least cloud cover are May and June (Cloud cover 39).

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Average visibility in August
Agat, GU

Average visibility in August - Agat, GU
  • 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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Agat, Guam, USA

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