Tachikawa Temperature by Month

The average annual maximum temperature in Tachikawa, Tokyo Prefecture, Japan is 20°C (68°F), with daytime highs ranging from 9°C (48°F) in January to 31°C (88°F) in August. This page covers monthly averages, day-night differences, and how Tachikawa compares to cities worldwide.

Visitors to Tachikawa will encounter a climate influenced by big temperature differences across the year. Nighttime temperatures 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 Tachikawa by month:

Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating. August, the warmest month of the year, receives 185 hours of sunshine.

The chart below shows the average temperature throughout the year:

Tachikawa'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:

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.

Buenos Aires, Argentina averages 23°C (73°F) a year, with hot summers and mild winters, and seasons reversed compared to Europe.

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.

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