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 11.4–18.8°C, 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 23.1–28.8°C, 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 19.6–26.6°C, temperatures gradually decrease, rainfall decreases. Common activities: Hiking, outings. Recommended clothing: Comfortable long-sleeved shirts, jackets.
Winter (December-February): Average 7.1–11.4°C, 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. 17.5°C / Annual rainfall: approx. 1421 mm / Summer humidity: 75%–85% / Rainiest month: May
Kainan monthly average temperature and precipitation
Month
Air temperature (°C)
Precipitation (mm)
January
6.4°C
30.5
February
7.1°C
40.4
March
11.4°C
106.1
April
16.3°C
130.7
May
18.8°C
237.6
June
23.1°C
226.9
July
28.4°C
152.4
August
28.8°C
88
September
26.6°C
169.8
October
19.6°C
120.8
November
14.7°C
92.7
December
8.6°C
25.2
Kainan weather for the next seven days
3/10
Tuesday
Patchy rain nearby
8.6°C/1.9°C
3/11
Wednesday
Sunny
9.5°C/0.9°C
3/12
Thursday
Partly Cloudy
10.6°C/2.2°C
3/13
Friday
Overcast
10.1°C/3.5°C
3/14
Saturday
Partly Cloudy
11.5°C/4.8°C
3/15
Sunday
Sunny
12°C/3.6°C
3/16
Monday
Sunny
12.9°C/4°C
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