Tomakomai Weather & Climate: Best Time to Visit

The climate in Tomakomai is known for significant temperature differences throughout the year, making the weather dynamic. On average, daytime temperatures range from a comfortable 23°C (73°F) in August to a very cold 0°C (32°F) in January.

Nighttime temperatures range from 19°C (66°F) in August to -6°C (21°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Tomakomai has a notably wet climate with abundant precipitation, recording 1277 mm (50 in) of rain/snowfall per year. The seasons in Tomakomai bring significant changes in precipitation. The wettest month, August, receives heavy rainfall, with an average of 197 mm (7.8 in) of precipitation. This rainfall is distributed across 19 rainy days.

In contrast, the driest month, January, experiences much less snowfall, totaling 54 mm (2.1 in) over 22 snowy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Tomakomai Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

In Tomakomai, summer days are longer and more sunny, with daily sunshine hours peaking at 6.6 hours in May. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 2.9 hours per average day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The relative humidity is high throughout the year in Tomakomai.

The city experiences its highest humidity in July, reaching 76%. In April, the humidity drops to its lowest level at 62%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year