Hatsukaichi Temperature by Month

Hatsukaichi, Japan has an average annual maximum temperature of 20°C (68°F), ranging from 9°C (48°F) in January to 31°C (88°F) in August. Below you'll find a full monthly breakdown and a comparison with cities worldwide.

With significant temperature fluctuations, Hatsukaichi enjoys distinct seasons year-round. Nighttime lows range from 24°C (75°F) in August to 2°C (36°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in Hatsukaichi 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 209 hours of sunshine.

The chart below shows the average temperature throughout the year:

Hatsukaichi'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:

Seville, Spain averages 23°C (73°F) a year, one of the warmer cities in Western Europe, with long hot summers.

Reykjavík, Iceland averages 9°C (48°F) a year, mild summers by Icelandic standards, but cold winters and frequent wind.

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

Melbourne, Australia averages 20°C (68°F) annually, known for unpredictable weather, with four seasons sometimes happening in one day.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In the cooler months, when temperatures drop below 10°C, high humidity makes the cold feel more cutting than it would in dry conditions.

In Hatsukaichi, January is the coolest month, with average highs of 9°C (48°F) and humidity around 66%, considered high. In August, the warmest month, temperatures average 31°C (88°F) with 68% humidity, conditions that feel high. For a full picture, see our humidity page.

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