June weather forecast
Nagoya, Japan

June in Nagoya is warmly humid, signifying clear summer conditions. Rainfall peaks this month, with precipitation reaching 201mm (7.91"), signifying the arrival of the rainy season. The high humidity levels, combined with the warm temperatures, create a potentially uncomfortable climate to those unaccustomed to it. The soaring temperatures and periodic rain enhance the city's vibrant greenery. Despite the rain, strong UV radiation persists, mandating the use of sun protection measures.

Temperature

The beginning of June in Nagoya signals a minor rise in the average high-temperature, moving from 24.1°C (75.4°F) in May to a still moderately hot 27.2°C (81°F). The average low-temperature during June nights is an enjoyable 19°C (66.2°F).

Heat index

June's average heat index is calculated to be 29°C (84.2°F). If exposure and ongoing activity persist, they might induce a state of tiredness and heat cramps.
Remember that heat index calculations are made for conditions in the shade with light wind. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values hold great significance to children. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.

Humidity

In June, the average relative humidity is 71%.

Rainfall

In Nagoya, in June, during 12.8 rainfall days, 201mm (7.91") of precipitation is typically accumulated. Throughout the year, in Nagoya, Japan, there are 116.3 rainfall days, and 1535mm (60.43") of precipitation is accumulated.

Snowfall

In Nagoya, snow does not fall in March through November.

Sea temperature

In Nagoya, the average seawater temperature in June is 23°C (73.4°F).
Note: For those not fond of cold temperatures, taking a swim at 23°C (73.4°F) may require consideration of the sunshine, wind, and ambient temperature. While wetsuits are not mandatory, they can enhance the experience.

Daylight

June has the longest days of the year in Nagoya, with an average of 14h and 30min of daylight.
On the first day of June, sunrise is at 04:39 and sunset at 19:01. On the last day of the month, sunrise is at 04:41 and sunset at 19:10 JST.

Sunshine

The months with the least sunshine are June and September, with an average of 5h of sunshine.

UV index

The months with the highest UV index in Nagoya are June through August, with an average maximum UV index of 10. A UV Index reading of 8 to 10 represents a very high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: A maximum high UV index of 10 in June translates into the following recommendations:
Always safeguard yourself; without protection, skin and eyes can get damaged instantly. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Experience reduced UV exposure by about half when donning a wide-brim hat. Prolonged stay under the direct sun should be avoided as much as possible, especially if a person burns easily. Sunscreen with a minimum 30 sun protection factor should always be used. Warning! The reflection of sand and water increases the UV dose.