July weather forecast
Merizo, GU

Weather in July

July, the same as June, is a moderately hot summer month in Merizo, Guam, with an average temperature fluctuating between 82.9°F (28.3°C) and 84.7°F (29.3°C).

Temperature

The warmest months are July and August, with an average high-temperature of 84.7°F (29.3°C).

Heat index

The average heat index in July is computed to be a torrid 95°F (35°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With 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 'apparent temperature', 'real feel', 'felt air temperature', or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (pregnancy, clothing, metabolic differences). Be aware that direct exposure to sunlight increases heat impact and may raise the heat index 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.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 99.5°F (37.5°C) to 100.9°F (38.3°C), thermal conditions are potentially life-threatening.

Humidity

In July, the average relative humidity in Merizo is 77%.

Rainfall

In Merizo, during July, the rain falls for 28.9 days and regularly aggregates up to 7.52" (191mm) of precipitation. In Merizo, during the entire year, the rain falls for 288.5 days and collects up to 60.08" (1526mm) of precipitation.

Ocean temperature

In Merizo, the average seawater temperature in July is 85.1°F (29.5°C).
Note: For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

In July, the average length of the day is 12h and 49min.
On the first day of July in Merizo, sunrise is at 5:58 am and sunset at 6:51 pm. On the last day of the month, sunrise is at 6:06 am and sunset at 6:49 pm ChST.

Sunshine

In July, the average sunshine is 8.6h.

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 estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 7 in July interpret into the following advice:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the warmest month in Merizo?

Warmest months in Merizo, Guam, are July and August, with an average high-temperature of 84.7°F (29.3°C).

What is the temperature in July in Merizo?

The average high-temperature, in July, in Merizo, Guam, is 84.7°F (29.3°C), while the average low-temperature is 82.9°F (28.3°C). The average heat index (a.k.a. 'real feel', 'feels like'), which combines relative humidity and air temperature, in July is computed to be 95°F (35°C).

What is the average humidity in July in Merizo?

In July, the average relative humidity in Merizo, Guam, is 77%.

How much does it rain in Merizo in July?

In Merizo, during July, the rain falls for 28.9 days and regularly aggregates up to 7.52" (191mm) of precipitation.

What is the water temperature in July in Merizo?

In July, the average ocean temperature is 85.1°F (29.5°C). Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

How many hours of daylight does Merizo have in July?

In Merizo, Guam, the average day length in July is 12h and 49min.

When are sunrise and sunset in July in Merizo?

On the first day of July in Merizo, Guam, sunrise is at 5:58 am and sunset at 6:51 pm. On the last day of the month, sunrise is at 6:06 am and sunset at 6:49 pm ChST.

How long on average sun shines in July in Merizo?

The average sunshine duration in July in Merizo, Guam, is 8.6h.

When is the highest UV index in Merizo?

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

What is the UV index reading in July in Merizo?

The average daily maximum UV index in July in Merizo is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to Sun's UV rays.

Average temperature in July
Merizo, GU

Average temperature in July - Merizo, GU
  • Average high temperature in July: 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 July: 82.9°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 July
Merizo, GU

Average pressure in July - Merizo, GU
  • Average pressure in July: 29.8"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 July
Merizo, GU

Average wind speed in July - Merizo, GU
  • Average wind speed in July: 10.3mph

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 July
Merizo, GU

Average humidity in July - Merizo, GU
  • Average humidity in July: 77%

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 July
Merizo, GU

Average rainfall in July - Merizo, GU
  • Average rainfall in July: 7.52"

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 July
Merizo, GU

Average rainfall days in July - Merizo, GU
  • Average rainfall days in July: 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 sea temperature in July
Merizo, GU

Average sea temperature in July - Merizo, GU
  • Average sea temperature in July: 85°F

The best month for swimming (with the highest average sea temperature) is August (85.4°F).
The coldest month (with the lowest average sea temperature) is February (82°F).

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Average daylight in July /
Average sunshine in July
Merizo, GU

Average daylight in July / Average sunshine in July - Merizo, GU
  • Average daylight in July: 12h and 49min

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 22min).

  • Average sunshine in July: 8h and 36min

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 July
Merizo, GU

Average sunshine days in July - Merizo, GU
  • Average sunshine days in July: 1.4 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 July
Merizo, GU

Average UV index in July - Merizo, GU
  • Average UV index in July: 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 July
Merizo, GU

Average cloud cover in July - Merizo, GU
  • Average cloud cover in July: 44

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 July
Merizo, GU

Average visibility in July - Merizo, GU
  • Average visibility in July: 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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