Kamaishi Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Kamaishi.
Climate overview of Kamaishi
Kamaishi, Iwate, Japan, experiences significant temperature variation throughout the year. Summers bring daytime highs of 25°C (77°F) in August, while winters cool to 5°C (41°F) in January.
With around 1526 mm (60 in) of annual rain/snowfall, Kamaishi has a notably wet climate. However, this rain/snowfall is not evenly distributed, the city has a distinct rainy season from July to September, with warm summers and cold winters. The wettest month is September.
Kamaishi Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Kamaishi - and find the best time to visit.
Monthly Temperature in Kamaishi
Depending on the time of the year, temperatures range from comfortable to chilly in Kamaishi. Average daytime temperatures reach a comfortable 25°C (77°F) in August. In January, the coolest month of the year, temperatures drop to a chilly 5°C (41°F).
At night, temperatures range from around 20°C (68°F) in August to -2°C (28°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Kamaishi
Kamaishi has a relatively rain/snowy climate with high precipitation levels, averaging 1526 mm (60 in) of rain/snowfall annually. Kamaishi can be quite wet during September, receiving approximately 212 mm (8.3 in) of precipitation over 19 rainy days.
In contrast, during the driest month (January), you will experience much drier conditions, with 69 mm (2.7 in) of precipitation spread across 21 snowy/rainy days. For more details, please visit our Kamaishi Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Kamaishi
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: July and August
- Warmest weather: August
- Seasonal pattern: A distinct rainy season from July to September, with warm summers and cold winters
- Coldest conditions: January, with freezing nights around -2°C (28°F).
Frequently asked questions about the climate in Kamaishi
What is the best time to visit Kamaishi?
July and August typically offer the most optimal weather in Kamaishi. In contrast, January, February, March, April and December tend to have less optimal conditions. Kamaishi has a distinct rainy season from July to September, with warm summers and cold winters.
What temperatures can I expect in Kamaishi?
Daytime highs range from 5°C (41°F) in January to 25°C (77°F) in August. Nighttime lows range from -2°C (28°F) to 20°C (68°F). Temperatures vary considerably through the year.
How much rain does Kamaishi get?
Annual rainfall is around 1526 mm (60 in). September is the wettest month with 212 mm (8.3 in), while January is the driest with 69 mm (2.7 in).
Kamaishi 3-Day Forecast
Kamaishi on the map
Kamaishi is highlighted - select any city to see its climate.
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