July weather forecastDededo, GU
July
Weather in July
July presents a phenomenal rainfall surge, rising to a peak average of 7.52" (191mm). The temperature slightly steps up to 84.7°F (29.3°C), tying with the forthcoming August for the highest yearly temperature in Dededo. The month's high rainfall gives an added allure to the cascading waterfalls on the island, maximizing their striking beauty. The moist, tropical climate stimulates the growth of the local flora, transforming the landscape into an emerald green paradise. Those who enjoy a rain-soaked environment will find July to be an optimal period for a visit.Temperature
The peak of Dededo's temperatures is noted during July and August, averaging a high-temperature of 84.7°F (29.3°C).Heat index
During July, the heat index is evaluated at a sweltering 95°F (35°C). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.Understanding the heat index involves considering values for shaded locales with light wind. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is found by incorporating humidity levels into the air temperature measurement. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.
Humidity
In July, the average relative humidity is 77%.Rainfall
In Dededo, 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 July, the average length of the day is 12h and 50min.On the first day of July, sunrise is at 5:57 am and sunset at 6:51 pm. On the last day of the month, sunrise is at 6:05 am and sunset at 6:48 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 value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for average individuals.Note: An average maximum UV index of 7 in July leads to these recommendations:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
Dededo, 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).
Average pressure in July
Dededo, 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).
Average wind speed in July
Dededo, 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).
Average humidity in July
Dededo, 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%).
Average rainfall in July
Dededo, 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").
Average rainfall days in July
Dededo, 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).
Average daylight in July /
Average sunshine in July
Dededo, GU
- Average daylight in July: 12h and 48min
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 18min).
- 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).
Average sunshine days in July
Dededo, 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).
Average UV index in July
Dededo, 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).
Average cloud cover in July
Dededo, 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).
Average visibility in July
Dededo, 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).





