Otari Temperature by Month

Otari in Nagano Prefecture, Japan sees significant seasonal temperature differences, with daytime highs between 1°C (34°F) in January and 27°C (81°F) in August, averaging 14°C (57°F) annually. Explore the full monthly breakdown below.

Visitors to Otari will encounter a climate influenced by big temperature differences across the year. Nighttime temperatures range from 19°C (66°F) in August to -6°C (21°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in Otari by month:

The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM, when the sun's heating effect is strongest. August, the warmest month, gets 166 hours of sunshine.

The chart below shows the average temperature throughout the year:

Otari's average annual maximum temperature is 14°C (57°F). To put that in context, here's how it compares to a few well-known destinations:

Lisbon, Portugal averages 21°C (70°F) annually, warm summers, mild winters, and rain mainly in the cooler months.

Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.

Seoul, South Korea averages 18°C (64°F) a year, with four clear seasons, cold winters, and hot humid summers.

Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained, so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.

For more on Otari's weather, including monthly rainfall, sunshine hours, and humidity, visit our Otari climate page.