Otari Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Otari.
Climate overview of Otari
Otari, Nagano Prefecture, Japan, sees big temperature differences between seasons, with August peaking at 27°C (81°F) and January dropping to 1°C (34°F).
The city has a wet climate, receiving around 3012 mm (119 in) of rain/snowfall per year. Despite the high annual total, it has warm summers and very cold winters. July is the wettest month. The most sunshine falls in April, with an average of 5.9 hours of daily sunshine.
Otari Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Otari - and find the best time to visit.
Monthly Temperature in Otari
Visitors to Otari can expect significant temperature changes throughout the year. On average, daytime temperatures range from a comfortable 27°C (81°F) in August to a very cold 1°C (34°F) in January.
Nighttime temperatures range from 19°C (66°F) in August to -6°C (21°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Otari
Otari is known for its substantial rain/snowfall, with annual precipitation reaching 3012 mm (119 in). The seasons in Otari bring significant changes in precipitation. The wettest month, July, receives heavy rainfall, with an average of 389 mm (15 in) of precipitation. This rainfall is distributed across 22 rainy days.
In contrast, the driest month, April, experiences much less rainfall, totaling 178 mm (7 in) over 17 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Otari 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 Otari
In Otari, summer days are longer and more sunny, with daily sunshine hours peaking at 5.9 hours in April. As the darker season arrives, the brightness of the sun becomes less. January sees a soft sun for only 2.7 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Best Time to Visit Otari
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Warmest weather: July and August
- Most sunshine: April and May
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -6°C (21°F).
Frequently asked questions about the climate in Otari
What is the best time to visit Otari?
Otari has warm summers and very cold winters.
What temperatures can I expect in Otari?
Daytime highs range from 1°C (34°F) in January to 27°C (81°F) in August. Nighttime lows range from -6°C (21°F) to 19°C (66°F). Temperatures vary considerably through the year.
How much rain does Otari get?
Annual rainfall is around 3012 mm (119 in). July is the wettest month with 389 mm (15 in), while April is the driest with 178 mm (7 in).
How sunny is Otari?
Otari receives around 1,559 hours of sunshine per year. April is the sunniest month with 177 hours, while January is the cloudiest with just 80 hours.
Otari 3-Day Forecast
Otari on the map
Otari is highlighted - select any city to see its climate.
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