Wakayama Weather in June
Season: SummerIn short: pretty warm; rainy season around early or middle June
Noticeably Warm up Towards the End of the Month
Average Temperature: 20-25℃ (68-77℉)Wakayama welcomes its summer in June, seeing quite warm weather, with high temperatures often ranging from 24-29℃ (75.2-84.2℉). Towards the end of the month, it gets hot and the daily maximum can reach 31-33 degrees Celsius (87.8-91.4 degrees Fahrenheit). Low temperatures also have a similar trend: in the first half of the month, ones are usually around 14-20℃ (57.2-68℉), but rise to 19-24℃ (66.2-75.2℉) in the second half of the month.
Most Humid Month
Around early or middle June, the rainy season comes into Wakayama, so its monthly precipitation reaches the highest value of 210 mm (8.3 in) throughout the year. There are 17 rainy days, during which light rain occurs most frequently, followed by moderate rain, and finally heavy downpours. The meteorological data from the past two years show that it rained every day within a week, 1 to 3 days of which saw rain lasting from morning to evening; sometimes, the one-day rainfall in this month could hit nearly 100 mm (3.9 in).Abundant precipitation makes June the wettest month in a year with the relative humidity of 76%. Particularly at the end of the month, coupled with high temperatures, people tend to be hot and humid.
Also, June marks the onset of the typhoon season, so remember to check local weather forecast ahead of time before your departure.
Sea Water Temperature
The sea temperature increases sharply to an average of 23℃ (73.4℉) in June, when you may feel a little bit chilly in the sea. Therefore, it’s better to go swimming at middy and in the early afternoon on sunny days.Longest Daylight Hours in a Year
As sunrise and sunset time is at around 4:49-4:51 and 19:04-19:13 respectively, June enjoys the longest daylight hours of 14 hours 15 minutes to 14 hours 22 minutes. Given the long distance between different scenic areas, sufficient daylight time makes your itineraries more flexible and also gives you a more relaxing travel experience.Though this month experiences the rainy season, you can still enjoy plenty of sunshine hours: the north has 9.2 hours per day, and the south 8.9 hours. June is not the hottest period in summer, but don’t underestimate its sunshine. The UV index usually hovers around 9 - 11, so sun protection is absolutely required if you plan to visit Wakayama in June 2026. Under the sun, the climate becomes pretty hot, but it’s still relatively cool in the shade of leafy trees and by the sea with cool winds.
What to Wear in Wakayama in June
Clothing: Due to high humidity and temperature, it’s smart to pack quick-drying and breathable clothes, such as loose short-sleeved T-shirts and thin pants in cotton or linen fabric. Plus, it’s advisable to bring along light long-sleeved garments against strong UV rays. If girls would like to match the distinctive summer beach flavor, bright dresses are highly recommended. Footwear: Different travel destinations need different shoes. For example, comfy mesh sneakers are more suitable for sightseeing in cities. By the sea with sandy beach, lightweight beach shoes or flip-flops are easy to wear or remove. Hikers had better wear waterproof and non-slip walking shoes; otherwise, it’s better not to hike in mountainous areas in the rain. Accessories:1. Sun-protective items including sun hats, sunglasses and sunscreen are essential in June.
2. Raingear is a necessity in the rainy season, as well as plastic shoe covers and water repellent spray are also important.
3. Anti-snake spray is advised for hikers, since snakes tend to be more active during rainy periods.
Bonus Tips and Advice for Wakayama Trip in June
1. In case of rain, replace outdoor scenic spots with indoor ones, such as Kuroshio Market in Wakayama Marina City, Tenkuu Cafe at Kimiidera Temple and Adventure World in Shirahama.
2. If you get caught in rain while visiting some seaside attractions, avoid taking photos on the rocks near the ocean. For instance, some rocks at Senjojiki Rock Terrace, frequently lashed by waves, are covered in seaweed. Along with rain water, ones get even more slippery, making you more prone to fall down.
3. Try to book a hotel with drying facilities, since clothes are very hard to dry in this month. If you cannot find one like this, hairdryer is also a good alternative.
