Yokosuka Temperature by Month

The average annual maximum temperature in Yokosuka, Kanagawa, Japan is 20°C (68°F), with daytime highs ranging from 11°C (52°F) in January to 29°C (84°F) in August. This page covers monthly averages, day-night differences, and how Yokosuka compares to cities worldwide.

In Yokosuka, temperatures can shift dramatically between warm in summer and cold in winter. Nights follow the same pattern, with lows ranging from 25°C (77°F) in August to 5°C (41°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in Yokosuka 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 208 hours of sunshine.

The chart below shows the average temperature throughout the year:

Yokosuka'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.

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

Beijing, China averages 20°C (68°F) annually, but with big seasonal swings, very cold winters and hot summers.

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

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 Yokosuka, January is the coolest month, with average highs of 11°C (52°F) and humidity around 54%, considered moderate. In August, the warmest month, temperatures average 29°C (84°F) with 76% 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.

Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round, large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.

For more on Yokosuka's weather, including monthly rainfall, sunshine hours, and humidity, visit our Yokosuka climate page.