Yokohama, Japan's second-largest city, sits on Tokyo Bay on the Pacific coast of central Honshu, just south of Tokyo, at approximately 35.44°N, 139.64°E. It has a humid subtropical climate (Köppen Cfa) essentially identical to that of neighbouring Tokyo — hot, humid summers and mild, dry, sunny winters — though its position directly on the bay gives it a marginally stronger maritime influence.

Summer, from June to September, is hot and humid, with August the hottest month — average highs around 30–31°C and muggy nights. As in Tokyo, it opens with the tsuyu plum-rain season of June and early July, a damp, drizzly spell, before the sultry peak of summer sets in. Late summer into autumn is typhoon season, when Pacific storms can bring strong winds and heavy rain to the exposed bayfront city.

Winter, from December to February, is mild, dry and sunny, with January the coldest month — average highs around 10°C and lows near 2–4°C. The bay's moderating influence keeps hard frost and snow uncommon, and long spells of bright, clear, dry weather driven by cold northwesterly winds are the norm. Snow falls only occasionally and rarely settles.

Yokohama is wet, receiving around 1,600–1,700 mm of rain a year, with peaks during the June–July plum rains and again from the typhoons and autumn rain fronts of September and October; winter is comparatively dry. Live rainfall, humidity, and pressure readings for the city are shown in the panels above.

Sitting right on Tokyo Bay, Yokohama shares the tsuyu plum rains and the late-summer typhoon season of the wider Kanto region, and as a dense coastal metropolis it feels a similar urban warming effect to Tokyo. Its bayside location gives it slightly milder, more sea-tempered conditions, and the mild, sunny transitional seasons of spring and autumn — cherry blossom and autumn colour — are the most pleasant times of year.

To follow any single measurement in Yokohama more closely, use our live instruments: the online barometer for atmospheric pressure, the thermometer for temperature, the hygrometer for humidity, the anemometer for wind speed, the wind vane for wind direction, and the rain gauge for rainfall.