Hachioji Temperature by Month
Hachioji, Tokyo Prefecture, Japan has an average annual maximum temperature of 19°C (66°F), ranging from 9°C (48°F) in January to 30°C (86°F) in August. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Hachioji Monthly Temperatures
With significant temperature fluctuations, Hachioji 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 Hachioji by month:
The coolest part of the day is typically between 4 AM and 6 AM, while 3 PM is usually the warmest, when solar heating is at its peak. August, the city's warmest month, averages 185 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Hachioji 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
Hachioji vs World: Temperature Compared
Hachioji's average annual maximum temperature is 19°C (66°F). To put that in context, here's how it compares to a few well-known destinations:
Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short winters.
Zermatt, Switzerland averages just 4°C (39°F) annually due to its altitude, with very cold winters and cool summers even at its warmest.
New York City, USA averages 17°C (63°F) a year, with hot humid summers and cold winters that bring regular snowfall.
Melbourne, Australia averages 20°C (68°F) annually — known for unpredictable weather, with four seasons sometimes happening in one day.
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.
Global average temperatures have risen by around 1.2°C since the pre-industrial era, and the effects are visible across many regions. Winters are milder on average, with fewer frost days and less snow in many parts of the world. Heatwaves are more frequent and more intense, and Europe's summers of 2018, 2019, and 2020 all set records.
Summers are also getting drier in some areas, while winter rainfall has increased in others. This contributies to higher river levels and more flooding. In many countries, spring arrives earlier and autumn lasts longer. It has knock-on effects for wildlife, agriculture, and local ecosystems.
For more on Hachioji's weather — including monthly rainfall, sunshine hours, and humidity — visit our Hachioji climate page.
