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Lake Toya Weather and Climate: A Comprehensive Guide

The climate in Lake Toya is marked by big temperature swings throughout the year. Temperatures range from warm during the warmest months to very cold in the cooler months. It is also known for its large amounts of rain/snowfall. Now, let’s break down all the climate details for a clearer picture.

Average maximum day and minimum night temperature

In Lake Toya, temperatures differ significantly between summer and winter months. Typically, average maximum daytime temperatures range from a comfortable 25°C in August to a very cold -1°C in the coolest month, January.

Nights are cooler, with lows often dropping to around -8°C during the colder months. Check out our detailed temperature page for more information.

Temperature ranges by month

Precipitation and rainy days

Lake Toya experiences significant rain/snowfall throughout the year, averaging 1207 mm of precipitation annually. The climate in Lake Toya shows significant variation throughout the year. Expect heavy rainfall in August, with an average of 181 mm of precipitation over 19 rainy days.

In contrast, February offers drier and sunnier days, with around 63 mm of snowfall over 26 snowy days. For more details, please visit our Lake Toya Precipitation page.

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

Sunshine over the year

For those who appreciate different seasons, Lake Toya serves as an ideal destination. Expect longer, more sun-filled days in May with an average of 6.6 hours of sunshine daily, and embrace the darker days in December, offering only 2.9 hours of daily sunlight. Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Data from: Sapporo, Japan (69 KM, 43 Miles).

Daily hours of sunshine

Data from: Sapporo, Japan (69 KM, 43 Miles).

Forecast for Lake Toya

Sat   Jan 11
0°C | -8°C
N 4 m/s
broken clouds and no rain

broken clouds and no rain

Sun   Jan 12
1°C | -8°C
E 2 m/s
6.6 mm
broken clouds and small chance of rain

broken clouds and small chance of rain

Mon   Jan 13
2°C | -5°C
SW 2 m/s
5.1 mm
broken clouds and  chance of slight snow

broken clouds and chance of slight snow

Select a Month of Interest

Check the conditions for any month of the year.

The best time of year to visit Lake Toya in Japan

During the months of July, August and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:
  • Which months have the greatest rainfall in Lake Toya?
    Most rainfall (rainy season) is seen in August and September.
  • When is winter in Lake Toya?
    The coldest season / winter is in the following months: January, February and December.
  • Which is the warmest month in Lake Toya?
    August has an average maximum temperature of 25°C and is the warmest month of the year.
  • Which is the coldest month in Lake Toya?
    The coldest month is January with an average maximum temperature of -1°C.
  • Which is the wettest month in Lake Toya?
    August tops the wettest month list with 181 mm of rainfall.
  • Which is the driest month in Lake Toya?
    February is the driest month with 63 mm of precipitation.
  • Which is the sunniest month in Lake Toya?
    May is the sunniest month with an average of 199 hours of sunshine.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.