July weather forecast
Hachioji, Japan

July is the highlight of summer in Hachioji with the highest annual temperature hitting an average of 30.3°C (86.5°F). Long, hot days are the dominant feature, with the maximum daylight hours being observed. July's weather is a mirror of peak summer, with high humidity and heat defining the majority of the days. The period offers warm, sunny days complemented by gentle, cooling breezes in the evenings. The season slowly progresses, making way for the upcoming rainy months.

Temperature

With the start of July, the average high-temperature marginally shifts from June's warm 25.9°C (78.6°F) to a hot 30.3°C (86.5°F). Hachioji's temperature in July lowers to a consistent average of 23.4°C (74.1°F) during the nights.

Heat index

The heat index for July is calculated to be a sweltering 37°C (98.6°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. 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.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. Overheating dangers loom when the body's heat release mechanisms are overshadowed by excessive gain.

Humidity

The most humid month is July, with an average relative humidity of 75%.

Rainfall

In Hachioji, in July, during 14.9 rainfall days, 64mm (2.52") of precipitation is typically accumulated. Throughout the year, there are 138 rainfall days, and 580mm (22.83") of precipitation is accumulated.

Snowfall

In Hachioji, Japan, snow does not fall in April through October and December.

Daylight

In Hachioji, the average length of the day in July is 14h and 19min.
On the first day of the month, sunrise is at 04:30 and sunset at 19:02. On the last day of July, sunrise is at 04:50 and sunset at 18:48 JST.

Sunshine

In Hachioji, the average sunshine in July is 9.3h.

UV index

July is the month with the highest UV index in Hachioji, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: In July, an average UV index of 7 transforms into the following instructions:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.