Spring (March–May): Average 12.2–18.8°C, mild climate but abundant rainfall, especially in April. Common activities: flower viewing, hiking (rain gear recommended). Suggested clothing: light jacket, comfortable long pants, rain gear.
Summer (June–August): Average 22.1–27.6°C, hot and humid, occasional showers. Common activities: swimming, surfing, mountain climbing (sun protection recommended). Suggested clothing: light and breathable clothing, sun hat, sunscreen.
Autumn (September–November): Average 19.7–16.1°C, comfortable and pleasant climate, decreasing rainfall. Common activities: viewing autumn leaves, hiking, stargazing. Suggested clothing: light jacket or cardigan, long pants.
Winter (December–February): Average 8.3–10.6°C, cold and dry, little rainfall. Common activities: onsen bathing, birdwatching, ocean viewing. Suggested clothing: warm jacket, beanie, gloves, scarf.
Izu Oshima climatological average
Annual average temperature: approx. 17.7°C / Annual rainfall: approx. 2774 mm / Summer humidity: 70%–80% / Rainiest month: April
Izu Oshima monthly average temperature and precipitation
Month
Air temperature (°C)
Precipitation (mm)
January
8.3°C
57
February
8.7°C
206.3
March
12.2°C
274.7
April
16.1°C
351.3
May
18.8°C
271.3
June
22.1°C
335
July
26.6°C
167
August
27.6°C
299
September
25.6°C
295.7
October
19.7°C
265
November
16.1°C
196.3
December
10.6°C
55.7
Izu Oshima weather for the next seven days
11/4
Tuesday
Sunny
16.5°C/14.8°C
11/5
Wednesday
Overcast
17.8°C/16.1°C
11/6
Thursday
Sunny
18.7°C/16.5°C
11/7
Friday
Sunny
18.3°C/16.8°C
11/8
Saturday
Partly Cloudy
19.3°C/17.4°C
11/9
Sunday
Patchy rain nearby
21.8°C/19.6°C
11/10
Monday
Patchy rain nearby
19.2°C/18.4°C
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