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.
Otari Monthly Temperatures
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:
Daily Historical Temperatures
50-year average (1976-2025)
Average high and low temperatures for each day of the month based on long-term records.
Average temperatures in June
Historical Otari Temperatures: 1976-2026
Browse day-by-day temperature records for Otari spanning 51 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: Otari vs Japan
The map below shows the annual temperature across Japan. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
very cold
Otari vs World: Temperature Compared
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.
