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Kosai Weather and Climate: A Comprehensive Guide

The temperature in Kosai can vary greatly throughout the year. The temperatures shift from very warm to cold. It also experiences much rainfall throughout the year. Now, let’s break down all the climate details for a clearer picture.

Average maximum day and minimum night temperature

Depending on the time of the year, temperatures range from very warm to chilly in Kosai. Average daytime temperatures reach a very warm 32°C in August. In January, the coolest month of the year, temperatures drop to a chilly 11°C.

At night, you can expect cooler temperatures, with averages dropping to around 3°C during this month. Check out our detailed temperature page for more information.

Temperature ranges by month

Precipitation and rainy days

Kosai has a relatively rainy climate with high precipitation levels, averaging 1985 mm of rainfall annually. Kosai can be quite wet during June, receiving approximately 264 mm of precipitation over 18 rainy days.

In contrast January, experiences much drier conditions, with 71 mm of rainfall, spread across 11 rainy days. For more details, please visit our Kosai Precipitation page.

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

Sunshine over the year

Kosai experiences moderate variation in sunshine hours across the seasons. With 7.1 hours daily sunshine in August, it dips to 5.0 hours in June, offering a balanced mix of sunny and overcast days. Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Data from: Hamamatsu, Japan (18 KM, 11 Miles).

Daily hours of sunshine

Data from: Hamamatsu, Japan (18 KM, 11 Miles).

Forecast for Kosai

Sun   Jan 12
10°C | 0°C
W 2 m/s
0.1 mm
overcast and slight rain

overcast and slight rain

Mon   Jan 13
10°C | 1°C
NW 6 m/s
clear and no rain

clear and no rain

Tue   Jan 14
11°C | 1°C
NW 6 m/s
almost clear and no rain

almost clear and no rain

Select a Month of Interest

Check the conditions for any month of the year.

The best time of year to visit Kosai in Japan

During the months of April, May and October 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 is the warmest month in Kosai?
    August has an average maximum temperature of 32°C and is the warmest month of the year.
  • Which is the coldest month in Kosai?
    The coldest month is January with an average maximum temperature of 11°C.
  • Which is the wettest month in Kosai?
    June tops the wettest month list with 264 mm of rainfall.
  • Which is the driest month in Kosai?
    December is the driest month with 71 mm of precipitation.
  • Which is the sunniest month in Kosai?
    August is the sunniest month with an average of 212 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.