Thanks to our tour guide, our tiny group of 13 had a wonderful day. Everyone jokingly said that we had the whole Okutama Lake area to ourselves and the whole car to ourselves today!
Anonymous User
Solo traveler
Okutama Weather, Climate and Best Time to Visit
Data source:Meteostat Update date:2025-09
Okutama year round climate
Spring (March–May): Average 10.1–18.5°C, mild and comfortable climate, but with relatively high rainfall, especially in April. Be prepared for rain. Common activities: Hiking, flower viewing, sightseeing. Recommended clothing: Light jacket, long-sleeved shirt, rain gear.
Summer (June–August): Average 22.5–28°C, hot and humid with abundant rainfall. Common activities: Playing in streams, mountain climbing (be sure to protect yourself from sun and rain). Recommended clothing: Light and breathable clothing, sun hat, rain gear.
Autumn (September–November): Average 17.8–25.2°C, pleasant climate, but September has the most rainfall. Be prepared for rain. Common activities: Viewing autumn leaves, hiking, photography. Recommended clothing: Light jacket, long-sleeved shirt, rain gear.
Winter (December–February): Average 4.2–6.7°C, cold and dry with low rainfall. Common activities: Hot springs, skiing (requires travel to other areas). Recommended clothing: Warm coat, hat, gloves, scarf.
Okutama climatological average
Annual average temperature: approx. 16°C / Annual rainfall: approx. 1726 mm / Summer humidity: 70%–80% / Rainiest month: September
Okutama monthly average temperature and precipitation
Month
Air temperature (°C)
Precipitation (mm)
January
4.2°C
28.7
February
5.4°C
50
March
10.1°C
129.1
April
15.3°C
138.2
May
18.5°C
149.3
June
22.5°C
261.4
July
27.6°C
170.7
August
28°C
251.1
September
25.2°C
324.6
October
17.8°C
128.3
November
13.1°C
71.6
December
6.7°C
23.9
Okutama weather for the next seven days
12/20
Saturday
Patchy rain nearby
14.5°C/5.9°C
12/21
Sunday
Patchy rain nearby
16.6°C/10.5°C
12/22
Monday
Partly Cloudy
11°C/3.9°C
12/23
Tuesday
Sunny
7.5°C/1.9°C
12/24
Wednesday
Moderate rain
8°C/5.3°C
12/25
Thursday
Partly Cloudy
10°C/3.9°C
12/26
Friday
Sunny
6.1°C/1.3°C
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