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Seiyo

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Seiyo Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Seiyo year round climate

  • Spring (March–May): 52–66°F 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): 73–82°F 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): 67–79°F 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): 43–46°F 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. 63.3°F / Annual rainfall: approx. 2639 mm / Summer humidity: 75%–85% / Rainiest month: June

Seiyo monthly average temperature and precipitation

Month
Air temperature (°F)
Precipitation (mm)
January
43.3°F
52.1
February
45.7°F
105.8
March
52.5°F
191.6
April
61.7°F
244.9
May
66.9°F
300.6
June
73.2°F
397.3
July
81.7°F
280.1
August
82.8°F
276.6
September
79.3°F
349.2
October
67.8°F
217.7
November
59°F
166.7
December
46.8°F
56.9

Seiyo weather for the next seven days

3/20
Friday
Partly Cloudy
62.4°F/46.3°F
3/21
Saturday
Sunny
58.8°F/37.7°F
3/22
Sunday
Partly Cloudy
60.4°F/39.3°F
3/23
Monday
Patchy rain nearby
62.8°F/48.6°F
3/24
Tuesday
Patchy rain nearby
58.7°F/42.8°F
3/25
Wednesday
Patchy rain nearby
55.6°F/46.2°F
3/26
Thursday
Patchy rain nearby
63.3°F/48.4°F

Seiyo Frequently Asked Questions and Useful Information for Travel

Best time to go to Seyo?

The best time to visit Seiyo is spring and autumn, when the weather is mild and suitable for viewing red foliage and flower viewing.

A must-visit attraction in Seyo?

Must-visit attractions in Seiyo include Yawatahama Port, Uno Town in Seiyo City, Kisaiya Hiroba in Uwajima City, and Uwajima Castle.