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

In Umatac, the warmest period comes during July and August, when the average high-temperature touches 84.7°F (29.3°C).

Heat index

In July, the average heat index is estimated at a torrid 95°F (35°C). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
The standards for the heat index are set for locations in shade and under light breezes. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', melds the effects of warmth and moisture to generate a feeling of heat. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.

Humidity

In July, the average relative humidity is 77%.

Rainfall

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

Daylight

The average length of the day in July is 12h and 50min.
On the first day of July, 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 Umatac, 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. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index, 7 in July, converts into the following recommendations:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.