Niihama

Planning your day in Niihama? Check out the latest weather updates. Below you will find current information, detailed forecasts, and helpful charts to help you prepare for any weather conditions.

The climate in Niihama is classified as humid subtropical, with four distinct seasons. It is characterized by significant temperature fluctuations throughout the year, allowing travelers to enjoy a variety of weather conditions. Summers here are hot and humid, while winters are cool but without extreme cold. Rainfall occurs year-round, so when planning your trip, it's worth being prepared for rainy days in any season.

The summer months, from June to September, are the warmest and most humid. Average temperatures in July and August rise to 25-26°C, creating a hot and muggy atmosphere. This period also coincides with the rainy season: July holds the record for the most rainy days. Winters, from December to February, are quite cool, with average temperatures around 4-5°C. Spring and autumn are comfortable transitional periods with mild and pleasant weather, ideal for exploring the city and its surroundings.

The climate in Niihama features distinct seasons and significant temperature fluctuations throughout the year. The coldest month is January, with an average temperature of about 4.0°C and minimums dropping to 1.4°C. In contrast, the heat peaks in August, the warmest month of the year, with an average temperature of 26.2°C and highs reaching nearly 29°C.

Summers in Niihama, especially in July and August, can be described as hot. Daytime temperatures consistently stay above 27°C, and even nights remain very warm, with minimums around 22-23°C. Winter, from December to February, is cool and fresh. Average daytime temperatures range between 6-8°C, while night temperatures can approach freezing. Despite the chill, severe frosts are not typical for this region.

Transitional seasons—spring and autumn—offer the most comfortable weather for visiting. In spring, temperatures rise quickly: from a cool average of 8.9°C in March to a pleasant 17.1°C in May. Autumn brings a gradual cooling: September still retains summer warmth with an average temperature of 23°C, dropping to 11.6°C by November. Diurnal temperature variations throughout the year are moderate, usually ranging from 5 to 8 degrees, providing relatively stable conditions throughout the day.

Niihama experiences a humid climate with precipitation throughout the year; however, its intensity and frequency vary significantly by season. There is a clearly defined wet summer period and a drier winter. Overall, travelers should be prepared for rain at almost any time of year, but especially during the summer months.

The primary rainy season occurs in the summer. Humidity peaks in July, which is the wettest month of the year. On average, July sees about 11 mm of precipitation, and the number of rainy days reaches 20. June and September are also characterized by high humidity, with 17 and 18 rainy days, respectively. Summer rainfall can be quite intense.

The driest months in Niihama are November, December, and January. During this period, precipitation is minimal, totaling just 2-3 mm per month. Nevertheless, even in these months, the weather is never completely dry: there are an average of 10 to 12 days with precipitation. In winter, this is usually light rain or drizzle. Given that minimum temperatures in January and December drop nearly to zero, wet snow is also possible.

When planning a trip to Niihama, it's important to choose the right wardrobe to stay comfortable in any weather. The golden rule for this region is to always be prepared for rain. Since rainy days occur frequently throughout the year, a sturdy umbrella or a lightweight waterproof jacket will be your indispensable companions. Regardless of the season, your luggage should include comfortable walking shoes, as you will likely want to explore the city and its surroundings on foot. Dressing in layers is particularly relevant here, especially during transitional seasons when the weather can change throughout the day.

Summer months, from June to August, in Niihama are warm and humid, with average temperatures above 20°C. Pack light and breathable clothing made from natural fabrics: t-shirts, shorts, skirts, and dresses. Due to the high humidity and frequent rain, quick-drying items are a plus. Don't forget sunscreen, a hat, and sunglasses for clear days. Winter, from December to February, is quite cool, with average temperatures around 4-5°C. You'll need a warm jacket, sweaters, fleece tops, as well as a hat, scarf, and gloves to stay warm during your walks.

Spring (March-May) and autumn (September-November) are times of changeable weather. Early spring and late autumn are still cool, so it's worth bringing a mid-season jacket and warm sweaters. In May and September, the weather is already significantly warmer, but evenings can be crisp. A layered wardrobe is the ideal solution: t-shirts, long-sleeved shirts, cardigans, and a light windbreaker that can be easily added or removed depending on the temperature. This approach will ensure you're ready for any weather whims and can fully enjoy your trip to Niihama.