Climate Insights for Kamaishi

The climate in Kamaishi is temperate. The average annual temperature is 11°C and approximately 1455mm of precipitation falls per year. Kamaishi receives a notable amount of rainfall throughout the year, including during its driest month. Kamaishi is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, September. The coldest months are January, February, December, when temperatures can drop to -2°C. Snowfall occurs from January to December, with around 90cm accumulating over the season.

Temperatures in Kamaishi vary considerably across the year, with a 28°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 26°C and the mean temperature sits around 23°C. The coldest month is January, when overnight lows fall to -2°C and the daily average is 1°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows. The sharpest temperature change occurs between September and October, with a 6°C shift in average temperatures.

Kamaishi is a fairly wet location, receiving approximately 1455mm of precipitation annually, which averages out to around 121mm per month. The wettest month is August, averaging 217mm of rainfall. September and July also tend to see above-average precipitation. The driest month is January, with just 53mm. That's 164mm less than August, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall. Snowfall is a regular feature from January to December, with around 90cm accumulating over the season. February typically sees the most snow at around 24cm.

Kamaishi is mildly breezy, with an average annual wind speed of 12km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 15km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 9km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 6km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 15km/h in winter, 12km/h in spring, 10km/h in summer, 11km/h in autumn.

It is currently summer in Kamaishi, which began on June 21, 2026. Kamaishi is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 26°C, while the coldest stretch bottoms out in January near -2°C. Autumn is next, beginning on September 23, 2026 (3 days from now).

The table below shows monthly climate averages for Kamaishi based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.