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Seiyo
Top activities in Seiyo
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Seiyo Weather and climate
Data source：Meteostat
Update date：2025-09
Seiyo year round climate
- Spring (March–May): 11.4–19.4°C on average, mild and rainy, occasional overcast and rainy weather. Common activities: Spring outings, flower viewing (depending on blooming conditions). Recommended clothing: Light jacket, long-sleeved shirts and pants.
- Summer (June–August): 22.9–28.2°C on average, hot and humid, relatively high rainfall. Common activities: Summer resorts, stream activities, mountain trail hiking (note sun protection and rain gear). Recommended clothing: Breathable and sweat-wicking clothing, rain gear.
- Autumn (September–November): 19.9–26.3°C on average, comfortable and pleasant climate, rainfall gradually decreasing. Common activities: Maple leaf viewing (depending on leaf color change), outdoor activities. Recommended clothing: Light jacket, long-sleeved shirts and pants.
- Winter (December–February): 6.3–8.2°C on average, cold and dry climate, low rainfall. Common activities: Hot spring bathing, indoor activities. Recommended clothing: Warm jacket, sweater, scarf and gloves.
Seiyo climatological average
Annual average temperature: approx. 17.4°C / Annual rainfall: approx. 2639 mm / Summer humidity: 75%–85% / Rainiest month: June
Seiyo monthly average temperature and precipitation
Month
Air temperature (°C)
Precipitation (mm)
January
6.3°C
52.1
February
7.6°C
105.8
March
11.4°C
191.6
April
16.5°C
244.9
May
19.4°C
300.6
June
22.9°C
397.3
July
27.6°C
280.1
August
28.2°C
276.6
September
26.3°C
349.2
October
19.9°C
217.7
November
15°C
166.7
December
8.2°C
56.9
Seiyo weather for the next seven days
11/1
Saturday
Heavy rain
19.8°C/14°C
11/2
Sunday
Sunny
19.2°C/12.2°C
11/3
Monday
Sunny
19.2°C/9.9°C
11/4
Tuesday
Patchy rain nearby
18.7°C/13.4°C
11/5
Wednesday
Moderate rain
18°C/14.8°C
11/6
Thursday
Patchy rain nearby
15.7°C/12.4°C
11/7
Friday
Patchy rain nearby
17.6°C/11.1°C
