July weather forecast
Nagasaki, Japan

Nagasaki swelters in July with the thermometer spiking to an average high of 30.1°C (86.2°F) and a low of 24.3°C (75.7°F). The city records the same amount of rainfall as it did in June, with 314mm (12.36"). This is indicative of the summer monsoon season in full effect, bringing bouts of heavy rain. Long daylight hours in July favor outdoor activities, ensuring that the city remains lively and vibrant. Heading into August, expect the temperature to climb, reaching the year's peak.

Temperature

With the onset of July, Nagasaki's weather sees a minor temperature rise, transitioning from a warm 26.4°C (79.5°F) in June to a tropical 30.1°C (86.2°F). Nagasaki in July experiences a low-temperature average of 24.3°C (75.7°F).

Heat index

For most parts of July, the heat index is appraised at a torrid 38°C (100.4°F). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.
It is important to note that the heat index values are for shaded areas and light wind scenarios. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. 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. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. 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. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.

Humidity

The most humid month in Nagasaki, Japan, is July, with an average relative humidity of 80%.

Rainfall

In Nagasaki, in July, during 11.6 rainfall days, 314mm (12.36") of precipitation is typically accumulated. In Nagasaki, Japan, during the entire year, the rain falls for 124.7 days and collects up to 1858mm (73.15") of precipitation.

Snowfall

March through November are months without snowfall.

Sea temperature

In July, the average sea temperature in Nagasaki is 25.7°C (78.3°F).
Note: Swimming, diving, and other water activities in the temperature range of 25°C (77°F) to 29°C (84.2°F) are perceived as very enjoyable and comfortable for prolonged durations.

Daylight

The average length of the day in July in Nagasaki is 14h and 4min.
On the first day of July, sunrise is at 05:16 and sunset at 19:32. On the last day of the month, sunrise is at 05:33 and sunset at 19:19 JST.

Sunshine

In July, the average sunshine is 5.8h.

UV index

The months with the highest UV index are July and August, with an average maximum UV index of 11. A UV Index of 11, and more, symbolizes an extreme threat to health from exposure to the Sun's UV radiation for the average person.
Note: In July, a daily UV index of 11 turns into the following recommendations:
Undertake every vital safety procedure, as unprotected skin and eyes could sustain burns in no time. 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. During bright days, sunglasses that offer UVA and UVB defense are recommended. Frequent reapplication of a broad-spectrum SPF 30+ sunscreen is vital every two hours or directly after a swim or an outdoor workout. Attention! The combination of sand and water reflections enhances UV ray intensity.