Our family visited Shirahama this time, so we only used two types of passes: "Adventure World" and "Seamore Hotel Onsen Pass." However, the cost of just Adventure World alone exceeded the price of the pass, and the Seamore Hotel Onsen was also fantastic. Another advantage of this pass is that it is valid for one week from the date of card swipe, which is very considerate of consumers.
Anonymous User
Family
Kainan Weather, Climate and Best Time to Visit
Data source:Meteostat Update date:2025-09
Kainan year round climate
Spring (March-May): Average 52–65°F, mild and comfortable climate, but rainfall gradually increases, with May marking the start of the rainy season. Common activities: Hiking, flower viewing. Recommended clothing: Light jacket, long-sleeved shirts, rain gear.
Summer (June-August): Average 73–83°F, hot and humid, with significant rainfall, but rainfall decreases in August. Common activities: Swimming, water sports. Recommended clothing: Light and breathable clothing, sun hat, sunscreen.
Autumn (September-November): Average 67–79°F, temperatures gradually decrease, rainfall decreases. Common activities: Hiking, outings. Recommended clothing: Comfortable long-sleeved shirts, jackets.
Winter (December-February): Average 44–52°F, lower temperatures, dry and less rain. Common activities: Hot spring bathing, indoor activities. Recommended clothing: Warm clothing, thick jackets, scarves, gloves.
Kainan climatological average
Annual average temperature: approx. 63.5°F / Annual rainfall: approx. 1421 mm / Summer humidity: 75%–85% / Rainiest month: May
Kainan monthly average temperature and precipitation
Month
Air temperature (°F)
Precipitation (mm)
January
43.5°F
30.5
February
44.8°F
40.4
March
52.5°F
106.1
April
61.3°F
130.7
May
65.8°F
237.6
June
73.6°F
226.9
July
83.1°F
152.4
August
83.8°F
88
September
79.9°F
169.8
October
67.3°F
120.8
November
58.5°F
92.7
December
47.5°F
25.2
Kainan weather for the next seven days
3/22
Sunday
Patchy rain nearby
59.2°F/41.1°F
3/23
Monday
Patchy rain nearby
60.3°F/47.1°F
3/24
Tuesday
Sunny
58.3°F/44.8°F
3/25
Wednesday
Patchy rain nearby
60°F/44°F
3/26
Thursday
Patchy rain nearby
60.9°F/47.5°F
3/27
Friday
Sunny
61.1°F/43.4°F
3/28
Saturday
Moderate rain
54.5°F/51.9°F
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