July weather forecast
Umatac, GU

July's weather steadily escalates in intensity, with Umatac, Guam experiencing a peak rainfall of 7.52" (191mm), significantly exceeding June's precipitation. The city braves the zenith of the rainy season amid this month, yet warmth and humidity persist. The climate adjusts the drawstring on the winds, endorsing tranquility despite the torrential rain. The daylight hours remain modest, ensuring that the city experiences enough sunshine despite the rainy onslaught.

Temperature

Temperatures in Umatac reach their maximum during July and August, recording an average high-temperature of 84.7°F (29.3°C).

Heat index

During July, the heat index is computed to be a fiery hot 95°F (35°C). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
Bear in mind that the heat index values are determined for shaded areas and light breezes. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'feels like', reflects the feeling of heat when considering both air temperature and humidity. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

The average relative humidity in July is 77%.

Rainfall

In Umatac, in July, it is raining for 28.9 days, with typically 7.52" (191mm) of accumulated precipitation. Throughout the year, there are 288.5 rainfall days, and 60.08" (1526mm) of precipitation is accumulated.

Daylight

In Umatac, the average length of the day in July is 12h and 50min.
On the first day of July in Umatac, sunrise is at 5:58 am and sunset at 6:52 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 in Umatac, Guam, is 8.6h.

UV index

The months with the highest UV index are January through August, October through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: In July, a regular UV index of 7 translates into these guidelines:
Guard oneself from overexposure. Defence against sun injury is vital. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Experience reduced UV exposure by about half when donning a wide-brim hat.