July weather forecast
Piti, GU

July is famous for its warm summer streak in Piti, Guam. Compared to June, conditions continue to be hot, yet manageable owing to the irresistible beaches and recreational water sports popular in the city. Although the weather becomes hotter moving into August, it is the generous rainfall of 7.52" (191mm) in July that steals the show, making it the wettest month of the year.

Temperature

Peak temperatures are observed in July and August, averaging a high-temperature of 84.7°F (29.3°C).

Heat index

For July, the heat index is computed to be a fiery hot 95°F (35°C). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
Records show heat index calculations are tailored for shaded regions and mild winds. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is the outcome of merging air's temperature and its humidity metrics. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
Sweat evaporation plays a crucial role in cooling the human body, a process enabled by perspiration. An increase in relative humidity retards evaporation, subsequently reducing the body's heat removal rate and leading to a sensation of being overly warm. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

In July, the average relative humidity is 77%.

Rainfall

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

Ocean temperature

In Piti, Guam, in July, the average water temperature is 85.1°F (29.5°C).
Note: For swimming, diving, and similar activities, the water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered delightful, allowing for extended periods of enjoyment without discomfort.

Daylight

The average length of the day in July in Piti, Guam, is 12h and 50min.
On the first day of July, sunrise is at 5:57 am and sunset at 6:52 pm. On the last day of the month, sunrise is at 6:05 am and sunset at 6:49 pm ChST.

Sunshine

In Piti, Guam, the average sunshine in July 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 in Piti. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum UV index of 7 during July translates into these guidelines:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Attention! UV strength is notably upped by the reflection of sand and water.