Spring (March–May): Average 11.3–19.4°C, mild climate, but relatively high rainfall, especially abundant in April and May. Common activities: Hiking, flower viewing (e.g., cherry blossoms, azaleas, depending on blooming conditions). Recommended clothing: Light jacket, long-sleeved shirt, rain gear.
Summer (June–August): Average 23.3–30.0°C, hot and humid, with relatively high rainfall, especially the most rainfall in July. Common activities: Beach activities, sightseeing at summer resorts. Recommended clothing: Light and breathable clothing, short sleeves, hat, sunscreen.
Autumn (September–November): Average 15.2–27.6°C, comfortable and pleasant climate, rainfall gradually decreases. Common activities: Maple viewing (depending on leaf color change), outdoor excursions. Recommended clothing: Long-sleeved shirt, light jacket, comfortable shoes.
Winter (December–February): Average 6.5–8.3°C, cold and dry, low rainfall. Common activities: Hot spring experience, indoor activities. Recommended clothing: Warm coat, sweater, scarf, hat.
Yanai climatological average
Annual average temperature: approx. 17.8°C / Annual rainfall: approx. 2156 mm / Summer humidity: 70%–80% / Rainiest month: July
Yanai monthly average temperature and precipitation
Month
Air temperature (°C)
Precipitation (mm)
January
6.5°C
54.5
February
7.1°C
101
March
11.3°C
166.4
April
16.3°C
238.8
May
19.4°C
283.6
June
23.3°C
297.4
July
28.2°C
306.2
August
30°C
179.8
September
27.6°C
261.4
October
20.4°C
77.9
November
15.2°C
129
December
8.3°C
60.9
Yanai weather for the next seven days
11/9
Sunday
Heavy rain
16.3°C/15.2°C
11/10
Monday
Sunny
16°C/10.2°C
11/11
Tuesday
Sunny
14.9°C/9°C
11/12
Wednesday
Sunny
16°C/10.7°C
11/13
Thursday
Sunny
17.6°C/13.2°C
11/14
Friday
Sunny
17.2°C/11.9°C
11/15
Saturday
Sunny
17.8°C/13.4°C
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