Oyama Temperature by Month

Oyama in Tochigi, Japan sees significant seasonal temperature differences, with daytime highs between 9°C (48°F) in January and 32°C (90°F) in August, averaging 20°C (68°F) annually. Explore the full monthly breakdown below.

With significant temperature fluctuations, Oyama enjoys distinct seasons year-round. Nighttime lows range from 23°C (73°F) in August to -1°C (30°F) in January.

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

Temperatures tend to bottom out between 4 AM and 6 AM, then climb to their daily peak around 3 PM. August, the warmest month, sees 185 hours of sunshine.

The chart below shows the average temperature throughout the year:

Oyama's average annual maximum temperature is 20°C (68°F). To put that in context, here's how it compares to a few well-known destinations:

Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.

Queenstown, New Zealand averages 10°C (50°F) annually, remember seasons are flipped, so its coldest months fall in June and July.

Chicago, USA averages 15°C (59°F) annually, known for extreme seasonal swings, from bitterly cold winters to warm summers.

Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate, hot dry summers and mild wet winters.

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 Oyama's weather, including monthly rainfall, sunshine hours, and humidity, visit our Oyama climate page.