Hachimantai Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Hachimantai.
Climate overview of Hachimantai
Temperatures in Hachimantai, Iwate, Japan, vary greatly throughout the year. August is the hottest month at 27°C (81°F), while January is the coldest at 0°C (32°F).
With around 1444 mm (57 in) of annual rain/snowfall, Hachimantai has a notably wet climate. The wettest month is July. Sunshine peaks in May, when the city sees around 6.6 hours of sunshine per day.
Hachimantai Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Hachimantai — and find the best time to visit.
Monthly Temperature in Hachimantai
The climate in Hachimantai is known for significant temperature differences throughout the year, making the weather dynamic. Average daytime temperatures reach a comfortable 27°C (81°F) in August. In January, the coolest month of the year, temperatures drop to a very cold 0°C (32°F).
At night, temperatures range from around 19°C (66°F) in August to -9°C (16°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Hachimantai
Hachimantai has a notably wet climate with abundant precipitation, recording 1444 mm (57 in) of rain/snowfall per year. Hachimantai experiences moderate seasonal variation in rainfall, with monthly averages ranging from 168 mm (6.6 in) in July, the wettest month, and 87 mm (3.4 in) in January, the driest month. For more details, please visit our Hachimantai 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 Hachimantai
Hachimantai experiences moderate variation in sunshine hours across the seasons. With 6.6 hours daily sunshine in May, it dips to 4.2 hours in December, offering a balanced mix of sunny and overcast days.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Hachimantai by Month
The relative humidity is high throughout the year in Hachimantai.
The city experiences its highest humidity in July, reaching 83%. In March, the humidity drops to its lowest level at 67%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Hachimantai
The wettest months are July and August, when precipitation is at its highest. Wondering where to travel based on your weather preferences? Our recommendation tool helps you find destinations with your ideal climate conditions. Use our weather planner to find your perfect destination.
Frequently asked questions about the climate in Hachimantai
What is the best time to visit Hachimantai?
June, July, August and September typically offer the most optimal weather in Hachimantai. In contrast, January, February, March, April, November and December tend to have less optimal conditions.
What temperatures can I expect in Hachimantai?
Daytime highs range from 0°C (32°F) in January to 27°C (81°F) in August. Nighttime lows range from -9°C (16°F) to 19°C (66°F). Temperatures vary considerably through the year.
How much rain does Hachimantai get?
Annual rainfall is around 1444 mm (57 in). July is the wettest month with 168 mm (6.6 in), while January is the driest with 87 mm (3.4 in).
How sunny is Hachimantai?
Hachimantai receives around 1,866 hours of sunshine per year. May is the sunniest month with 197 hours, while December is the cloudiest with just 125 hours.
Hachimantai 3-Day Forecast
Hachimantai 3-Day Forecast
Hachimantai on the map
Hachimantai is highlighted — select any city to see its climate.
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