Okutama Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Okutama.
Climate overview of Okutama
Okutama, in Tokyo Prefecture, Japan, experiences a humid subtropical climate with significant seasonal temperature variation. The mountainous area has warm summers and cold winters with the region receiving heavy precipitation throughout the year, including substantial snowfall during the winter months.
This mountainous town attracts visitors with its spectacular lakes and hiking trails in the Japanese Alps, functioning as one of Tokyo's primary water source regions. It's also known for its beautiful autumn foliage and traditional hot springs. Let's now guide you through the climate details for a complete overview on the best time to visit.
Okutama Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Okutama - and find the best time to visit.
Monthly Temperature in Okutama
The climate in Okutama is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a comfortable 29°C (84°F) in August to a chilly 7°C (45°F) in the coolest month, January.
Nights vary from 21°C (70°F) in August to around -3°C (27°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Okutama
Okutama has a notably wet climate with abundant precipitation, recording 2093 mm (82 in) of rain/snowfall per year. The climate in Okutama shows significant variation throughout the year. Expect heavy rainfall in September, the wettest month, with an average of 274 mm (11 in) of precipitation over 20 rainy days.
In contrast, the driest month December offers drier and sunnier days, with around 69 mm (2.7 in) of rainfall over 8 rainy days. For more details, please visit our Okutama Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Okutama
Okutama offers a pleasant mix of sunny and slightly overcast days. The difference in sunshine hours between August (6.7 hours daily) and June (5.0 hours daily) provides a bit of variety for visitors and residents.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Okutama by Month
The relative humidity is high throughout the year in Okutama.
The city experiences its highest humidity in July, reaching 74%. In March, the humidity drops to its lowest level at 59%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Okutama
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May
- Warmest weather: July and August
- Most sunshine: April, May and August
- Fewest rainy days: January and December
- Seasonal pattern: A distinct rainy season from May to October, with warm summers and cold winters
- Coldest conditions: January, with freezing nights around -3°C (27°F).
Frequently asked questions about the climate in Okutama
What is the best time to visit Okutama?
May typically offers the most optimal weather in Okutama. In contrast, January, February, March, July, September and December tend to have less optimal conditions. Okutama has a distinct rainy season from May to October, with warm summers and cold winters.
What temperatures can I expect in Okutama?
Daytime highs range from 7°C (45°F) in January to 29°C (84°F) in August. Nighttime lows range from -3°C (27°F) to 21°C (70°F). Temperatures vary considerably through the year.
How much rain does Okutama get?
Annual rainfall is around 2093 mm (82 in). September is the wettest month with 274 mm (11 in), while December is the driest with 69 mm (2.7 in).
How sunny is Okutama?
Okutama receives around 2,097 hours of sunshine per year. August is the sunniest month with 201 hours, while June is the cloudiest with just 150 hours. Overall, Okutama enjoys abundant sunshine.
Okutama 3-Day Forecast
Okutama on the map
Okutama is highlighted - select any city to see its climate.
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