Otsu Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Otsu.
Climate overview of Otsu
The climate in Otsu, Shiga, Japan, is marked by large temperature swings across the seasons, ranging from 33°C (91°F) in August to 9°C (48°F) in January.
The city has a wet climate, receiving around 1597 mm (63 in) of rain/snowfall per year. July is the wettest month. May is the sunniest month, averaging 6.2 hours of sunshine per day.
Otsu Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Otsu — and find the best time to visit.
Monthly Temperature in Otsu
In Otsu, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a very warm 33°C (91°F) in August to a chilly 9°C (48°F) in January.
Nighttime temperatures range from 23°C (73°F) in August to 0°C (32°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Otsu
Otsu experiences significant rain/snowfall throughout the year, averaging 1597 mm (63 in) of precipitation annually. The seasons in Otsu bring significant changes in precipitation. The wettest month, July, receives heavy rainfall, with an average of 214 mm (8.4 in) of precipitation. This rainfall is distributed across 19 rainy days.
In contrast, the driest month, December, experiences much less rainfall, totaling 68 mm (2.7 in) over 18 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Otsu Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Otsu
Otsu enjoys sunny spells year-round. May sees up to 6.2 hours of daily sunshine, perfect for a sunny trip. February, the least sunny month, still offers a generous 4.0 hours of sun despite this cloudier time of the year.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Otsu by Month
The relative humidity is high throughout the year in Otsu.
The city experiences its highest humidity in July, reaching 70%. In April, the humidity drops to its lowest level at 60%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Otsu
Be prepared for heavier rainfall during June, July and September, the wettest period of the year. Seeking the perfect travel destination for this year? We've created a tool that suggests locations matching your desired weather. Let our weather planner guide your travel decisions.
Frequently asked questions about the climate in Otsu
What is the best time to visit Otsu?
May and October typically offer the most optimal weather in Otsu. In contrast, January, February, July and August tend to have less optimal conditions.
What temperatures can I expect in Otsu?
Daytime highs range from 9°C (48°F) in January to 33°C (91°F) in August. Nighttime lows range from 0°C (32°F) to 23°C (73°F). Temperatures vary considerably through the year.
How much rain does Otsu get?
Annual rainfall is around 1597 mm (63 in). July is the wettest month with 214 mm (8.4 in), while December is the driest with 68 mm (2.7 in).
How sunny is Otsu?
Otsu receives around 1,805 hours of sunshine per year. May is the sunniest month with 185 hours, while February is the cloudiest with just 120 hours.
Otsu 3-Day Forecast
Otsu 3-Day Forecast
Otsu on the map
Otsu is highlighted — select any city to see its climate.
Popular this month
Where to go in July — average daytime high across popular destinations.
Osaka
32°C (90°F) Tokyo30°C (86°F) Naha
30°C (86°F) Kyoto31°C (88°F) Hakone28°C (82°F) Hakuba26°C (79°F) Sapporo24°C (75°F) Niseko24°C (75°F) 
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