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Ōtsu, Shiga Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Ōtsu, Shiga?
Ōtsu, Shiga gets 1400 mm of precipitation a year over about 108 rainy days. August is the warmest month (average high 34°C) and January the coldest (average low 1°C).
Humid subtropical climate
Ōtsu, Shiga has hot summers and chilly winters. Daytime highs range from about 9°C in January to 34°C in August. July is usually the wettest month. The most comfortable time to visit is typically April to May and October to November, when daytime highs sit near 21°C.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | 2° | 11° |
| Spring | Mar–May | 9° | 20° |
| Summer | Jun–Aug | 22° | 31° |
| Autumn | Sep–Nov | 14° | 23° |
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.
From October 2025 to September 2026 Ōtsu got 2851 mm of rain, against a normal of 1400 mm for those months. July 2026 had the most, with 1124 mm.
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. Estimated sunshine is 46% of daylight hours, derived from ERA5 cloud cover. 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. Estimated sunshine is 43% of daylight hours, derived from ERA5 cloud cover. 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. Estimated sunshine is 39% of daylight hours, derived from ERA5 cloud cover. 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. Estimated sunshine is 37% of daylight hours, derived from ERA5 cloud cover. 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. Estimated sunshine is 32% of daylight hours, derived from ERA5 cloud cover. 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. Estimated sunshine is 22% of daylight hours, derived from ERA5 cloud cover. 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. Estimated sunshine is 25% of daylight hours, derived from ERA5 cloud cover. 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. Estimated sunshine is 34% of daylight hours, derived from ERA5 cloud cover. 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. Estimated sunshine is 33% of daylight hours, derived from ERA5 cloud cover. 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. Estimated sunshine is 46% of daylight hours, derived from ERA5 cloud cover. 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. Estimated sunshine is 53% of daylight hours, derived from ERA5 cloud cover. 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. Estimated sunshine is 54% of daylight hours, derived from ERA5 cloud cover. 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 estimated sunshine of 54% of daylight hours from ERA5 cloud cover. June is the cloudiest, at 22%. The annual cloud-cover estimate is 39% of daylight hours; it is not a measurement of sunshine duration. Ōtsu is sunnier than 57% of Japan.
Humidity peaks in July at 79% and is lowest in April at 65%.
Ōtsu has about 46 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
These records cover KYOTO during 1970–2026. Earlier records or other stations in the city may differ.
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 in the available station history brought 375 mm of precipitation, on August 27, 2026.
43 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.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | 1° | 9° | 49 mm | 8 | 73% | 46% | 17° | -6° |
| February | 1° | 10° | 62 mm | 9 | 70% | 43% | 22° | -7° |
| March | 3° | 14° | 100 mm | 10 | 67% | 39% | 26° | -4° |
| April | 9° | 20° | 107 mm | 9 | 65% | 37% | 31° | 1° |
| May | 14° | 25° | 135 mm | 8 | 69% | 32% | 34° | 4° |
| June | 19° | 28° | 181 mm | 11 | 75% | 22% | 37° | 8° |
| July | 23° | 32° | 203 mm | 12 | 79% | 25% | 40° | 14° |
| August | 24° | 34° | 135 mm | 8 | 76% | 34% | 40° | 17° |
| September | 20° | 29° | 172 mm | 10 | 76% | 33% | 38° | 11° |
| October | 14° | 23° | 134 mm | 8 | 74% | 46% | 33° | 3° |
| November | 8° | 17° | 70 mm | 7 | 74% | 53% | 27° | 0° |
| December | 3° | 12° | 52 mm | 8 | 73% | 54% | 23° | -3° |
Station: KYOTO, 12 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1970–2026; record values refer to this station and period, not the entire city’s history. Precipitation includes rain and the water equivalent of frozen precipitation; snowfall depth is shown separately when available. Sources and methods
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
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?
Within the available 1970–2026 station history, 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 estimated sunshine of 54% of daylight hours from ERA5 cloud cover. 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.