Koto

Stay up to date with the latest weather conditions in Koto. Below, you'll find current information, detailed forecasts, and visual weather charts for your convenience.

The climate in Koto, Japan, can be described as temperate, with four distinct seasons. Travelers can expect significant changes in weather conditions throughout the year, allowing you to choose the most comfortable time for your visit depending on your preferences.

Winter (December–February) in Koto is usually cool, with average air temperatures ranging from 5.0°C to 7.2°C. At night, the thermometer can drop close to zero, especially in January (average minimum of 0.8°C). This period is considered the driest of the year: rainfall does not exceed 1–2 mm, and the number of rainy days ranges from 6 to 8. With the arrival of spring (March–May), the weather gradually becomes warmer. Average temperatures rise from 10.5°C in March to 19.2°C in May, while precipitation and the number of rainy days increase slightly, bringing refreshing showers (averaging 4 mm of rainfall and 11–13 rainy days per month).

Summer (June–August) in Koto is the hot season. Average temperatures stay within the range of 22.5°C to 28.0°C, and in August, daytime highs often exceed 30°C (average maximum 31.0°C). During the summer months, as well as in early autumn, the number of rainy days increases (13–15 days per month), but the total amount of precipitation remains moderate (4–6 mm). Autumn (September–November) begins with comfortably warm days (September average 24.4°C) but gradually gives way to cooler weather (November average 13.0°C). Notably, October is often the wettest month (around 7 mm) with the highest number of rainy days (up to 15) in the year, which is worth considering when planning your trip.

The climate in Koto is characterized by significant seasonal temperature variations. Throughout the year, the average temperature ranges from cool to hot. January is usually the coldest month, with an average temperature of about 5.0°C, while night minimums can drop to 0.8°C and daytime maximums reach 9.1°C. Conversely, August is the hottest month, with an average temperature of 28.0°C. In August, daytime heat can rise to 31.0°C, and nights remain very warm, with minimum temperatures around 25.0°C.

The summer months in Koto, from June to August, bring consistently warm and hot weather. In June, the average temperature stays around 22.5°C, gradually rising to 26.7°C in July and peaking in August. In summer, the difference between day and night temperatures is relatively small, at about 6–7°C, indicating steady warm conditions around the clock. The feel of the heat can be intensified by the humidity typical of the summer period in Japan.

Winter, covering December, January, and February, brings a chill to Koto. Average temperatures during this period fluctuate from 5.0°C in January to 7.2°C in December. Nighttime temperatures in winter can be quite low, especially in January, approaching the freezing point. Daytime winter maximums are typically in the 9–11°C range. In the winter months, there is a more pronounced difference between day and night temperatures, reaching 8–9°C, which makes mornings and evenings noticeably colder compared to the daytime.

In Koto, precipitation is distributed throughout the year with noticeable fluctuations; however, there is no pronounced rainy season, as total rainfall amounts remain moderate. Nevertheless, a wetter period can be identified during the summer and autumn months, and a drier period during winter.

The highest amount of rainfall occurs in October, which averages 7 mm and up to 15 rainy days. July is also one of the wettest months in terms of frequency, with 15 rainy days and a total volume of about 6 mm. June and September are also characterized by an increased probability of rain: roughly 6 mm of precipitation and about 14 rainy days in each of these months. Overall, from May to October, rain is fairly frequent, occurring 13 to 15 days a month, but based on the total amounts, these are most often light or moderate showers.

The driest months in Koto are December, January, and February. December sees the minimum rainfall of the year—only about 1 mm, with approximately 6 rainy days. January and February are also quite dry, with about 2 mm of precipitation and 6–8 rainy days respectively. Given that minimum temperatures in January and February drop close to zero (0.8°C and 2.0°C respectively), rare winter precipitation may sometimes fall as sleet or freezing rain, though light rain is more common.

When packing for your trip to Koto, remember that comfortable shoes are your best ally for exploring the city. The weather here can be changeable, and given the number of rainy days throughout the year (from 6–8 days in winter to 11–15 days between March and October), a light umbrella or a compact raincoat will be essential accessories. The principle of layering is also very relevant for Koto, allowing you to easily adapt to temperature changes throughout the day.

During the cold period, spanning roughly December, January, and February, average temperatures in Koto range from 5°C to 7.2°C, and nighttime lows can drop to 0.8°C–2.0°C. For a comfortable stay, you will need warm clothes: a winter jacket or coat, sweaters, fleece tops, as well as a hat, scarf, and gloves. Although monthly precipitation in winter is low (1–2 mm), waterproof outerwear will come in handy given the 6–8 rainy days per month.

From March to November, the weather in Koto becomes significantly warmer, though precipitation also increases. In spring (March–May) and autumn (September–November), temperatures vary from 10.5°C (March) to 24.4°C (September), making light jackets or cardigans useful additions to your main wardrobe. In summer (June–August), average temperatures reach 22.5–28.0°C, with highs potentially exceeding 31°C. During this period, your wardrobe should consist of light, breathable clothing made from natural fabrics. Don't forget a hat, sunglasses, and SPF sunscreen for sun protection. Remember that from March to October, the number of rainy days (11–15 per month) and precipitation (4–7 mm per month, especially in October) increases, so reliable rain protection remains important.