Ōtsu, Shiga Weather by Month and Climate Averages

How much rain does Ōtsu get?

Ōtsu gets 1400 mm of precipitation in an average year, spread over about 108 days with measurable rain. That is fewer rainy days than 58% of Japan.

July is the wettest month, with 203 mm. January is the driest, with 49 mm. July has the most rainy days, about 12.

The longest dry spell in the last five years lasted 18 days, to January 12, 2023.

Ōtsu weather by month

Ōtsu weather in January

In January, Ōtsu averages a high of 9°C and a low of 1°C. It gets 49 mm of precipitation over about 8 rainy days. The sun is out about 46% of daylight hours. The January record high is 17°C (1997) and the record low is -6°C (1997).

Ōtsu weather in February

In February, Ōtsu averages a high of 10°C and a low of 1°C. It gets 62 mm of precipitation over about 9 rainy days. The sun is out about 43% of daylight hours. The February record high is 22°C (2010) and the record low is -7°C (1977).

Ōtsu weather in March

In March, Ōtsu averages a high of 14°C and a low of 3°C. It gets 100 mm of precipitation over about 10 rainy days. The sun is out about 39% of daylight hours. The March record high is 26°C (2023) and the record low is -4°C (1977).

Ōtsu weather in April

In April, Ōtsu averages a high of 20°C and a low of 9°C. It gets 107 mm of precipitation over about 9 rainy days. The sun is out about 37% of daylight hours. The April record high is 31°C (2024) and the record low is 1°C (1987). April is one of the most comfortable months to visit.

Ōtsu weather in May

In May, Ōtsu averages a high of 25°C and a low of 14°C. It gets 135 mm of precipitation over about 8 rainy days. The sun is out about 32% of daylight hours. The May record high is 34°C (2019) and the record low is 4°C (1991). May is one of the most comfortable months to visit.

Ōtsu weather in June

In June, Ōtsu averages a high of 28°C and a low of 19°C. It gets 181 mm of precipitation over about 11 rainy days. The sun is out about 22% of daylight hours. The June record high is 37°C (2022) and the record low is 8°C (1981).

Ōtsu weather in July

In July, Ōtsu averages a high of 32°C and a low of 23°C. It gets 203 mm of precipitation over about 12 rainy days. The sun is out about 25% of daylight hours. The July record high is 40°C (2018) and the record low is 14°C (1982).

Ōtsu weather in August

In August, Ōtsu averages a high of 34°C and a low of 24°C. It gets 135 mm of precipitation over about 8 rainy days. The sun is out about 34% of daylight hours. The August record high is 40°C (1994) and the record low is 17°C (1972).

Ōtsu weather in September

In September, Ōtsu averages a high of 29°C and a low of 20°C. It gets 172 mm of precipitation over about 10 rainy days. The sun is out about 33% of daylight hours. The September record high is 38°C (2010) and the record low is 11°C (1976).

Ōtsu weather in October

In October, Ōtsu averages a high of 23°C and a low of 14°C. It gets 134 mm of precipitation over about 8 rainy days. The sun is out about 46% of daylight hours. The October record high is 33°C (2019) and the record low is 3°C (1983). October is one of the most comfortable months to visit.

Ōtsu weather in November

In November, Ōtsu averages a high of 17°C and a low of 8°C. It gets 70 mm of precipitation over about 7 rainy days. The sun is out about 53% of daylight hours. The November record high is 27°C (2023) and the record low is 0°C (1973). November is one of the most comfortable months to visit.

Ōtsu weather in December

In December, Ōtsu averages a high of 12°C and a low of 3°C. It gets 52 mm of precipitation over about 8 rainy days. The sun is out about 54% of daylight hours. The December record high is 23°C (2018) and the record low is -3°C (1973).

Sunshine, humidity and wind in Ōtsu

December is the sunniest month in Ōtsu, with sunshine about 54% of daylight hours. June is the cloudiest, at 22%. Over the year the sun shines about 39% of daylight hours. Ōtsu is sunnier than 57% of Japan.

Humidity peaks in July at 79% and is lowest in April at 65%.

Ōtsu has about 45 days a year above 32°C. Ōtsu is hotter than 99% of Japan.

First and last freeze in Ōtsu

The first fall freeze in Ōtsu typically comes around December 17, and the last spring freeze around March 9. That leaves a frost-free growing season of about 283 days.

Ōtsu weather records

The hottest temperature on record at the Ōtsu station is 40°C, on August 8, 1994. The coldest is -7°C, on February 16, 1977.

The wettest day on record brought 258 mm of rain, on July 18, 2015.

41 all-time records have been set at the station since 1970.

The best time to visit Ōtsu

The most comfortable time to visit is typically April to May and October to November, when daytime highs sit near 21°C.

Winter (December–February) is chilly, with average highs around 10°C and lows near 2°C.

Spring (March–May) is mild, with average highs around 20°C and lows near 9°C.

Summer (June–August) is hot, with average highs around 31°C and lows near 22°C. It can feel humid.

Autumn (September–November) is warm, with average highs around 23°C and lows near 14°C.

Ōtsu climate questions

How much rain does Ōtsu get?

Ōtsu gets 1400 mm of precipitation in an average year, over about 108 rainy days.

What is the wettest month in Ōtsu?

July is the wettest month in Ōtsu, with 203 mm. January is the driest, with 49 mm.

How many rainy days does Ōtsu have a year?

Ōtsu has about 108 days with measurable rain in an average year. July has the most, about 12.

What is the hottest month in Ōtsu?

August is the warmest month in Ōtsu, with an average high of 34°C.

What is the coldest month in Ōtsu?

January is the coldest month in Ōtsu, with an average low of 1°C.

What is the record high temperature in Ōtsu?

The record high at the Ōtsu station is 40°C, set on August 8, 1994. The record low is -7°C, on February 16, 1977.

What is the sunniest month in Ōtsu?

December is the sunniest month in Ōtsu, with sunshine about 54% of daylight hours. June is the cloudiest.

When is the first frost in Ōtsu?

The first fall freeze in Ōtsu typically comes around December 17. The last spring freeze is around March 9.

What is the best time to visit Ōtsu?

The most comfortable time to visit is typically April to May and October to November, when daytime highs sit near 21°C.