Otaru

Planning a trip to charming Otaru? To ensure your journey is flawless, check out the latest weather information. Below you'll find current reports, forecasts, and helpful charts.

The climate in Otaru is temperate, featuring four distinct seasons. Travelers can expect cold, snowy winters and warm, pleasant summers, while spring and autumn offer mild transitional periods perfect for exploring the city and its surroundings.

Winter months, from December to February, bring freezing temperatures, with January averaging around -5.3°C. This period also sees a significant number of wet days, which in Otaru means frequent snowfall. Spring arrives with gradual warming: while March temperatures hover around freezing, by May the air warms to an average of +11.4°C, making the weather comfortable for walking.

Summer in Otaru, especially July and August, is the warmest season, with average temperatures rising above +20°C (reaching +21.4°C in August). August is also the month with the highest precipitation and wet days during the summer. Autumn brings a pleasant chill in September and October, after which temperatures drop noticeably in November and the number of rainy days increases again, signaling the approach of winter. Overall, while the total precipitation in millimeters is not very high, its frequency, especially in the colder months, is a hallmark of the local climate.

The temperature in Otaru shows a clear change of seasons with notable fluctuations throughout the year. The coldest month is typically January, when the average temperature drops to -5.3°C and minimum night temperatures can reach -7.5°C. In contrast, the warmest period occurs in August, with an average temperature of +21.4°C and maximum daytime values around +24.0°C. Thus, the annual range of average temperatures is nearly 27 degrees, reflecting the city's pronounced seasonal character.

Summer months in Otaru offer pleasant warmth, ideal for walking and exploring the surroundings. In June, the average temperature is a comfortable +15.5°C (ranging from +12.3°C at night to +18.8°C during the day), gradually rising to +20.5°C in July (minimum +17.6°C, maximum +23.4°C). The peak of summer heat is in August, when the average temperature reaches +21.4°C, and daytime highs can rise to +24.0°C, while nights remain warm at around +18.8°C. Overall, summer in Otaru can be described as moderately warm without sweltering heat.

Winter in Otaru is the real deal, with consistent sub-zero temperatures. Starting in December, the average temperature settles at -3.5°C (ranging from -5.5°C to -1.5°C). In January and February, the frosts are most felt, with averages of -5.3°C (from -7.5°C to -3.1°C) and -4.5°C (from -6.7°C to -2.4°C) respectively. Temperature differences between day and night throughout the year in Otaru are relatively stable, usually ranging from 4°C to 7°C, providing a fairly predictable daily temperature cycle without sharp jumps.

Precipitation occurs year-round in Otaru, but its nature and frequency change significantly depending on the season. The winter months, especially December (averaging 28 wet days), January (25 wet days), and February (21 wet days), are characterized by frequent snowfall. Although the total monthly precipitation during this period is small (3-4 mm), snow falls regularly, creating the classic winter atmosphere typical of the region. Transitional months like November (5 mm of precipitation, 21 wet days) and March (3 mm of precipitation, 16 wet days) also feature a significant number of wet days, which can be snow, sleet, or rain, especially in early spring and the lead-up to winter.

As warmer weather arrives, the precipitation turns to rain. April stands out as the driest month of the year: total precipitation is only 2 mm and the number of wet days is about 11. During the spring and summer months, from May to September, precipitation is mostly rainfall. The highest volume of rain occurs in August (6 mm), which also has a relatively high number of wet days for summer (18 days). July, despite the summer warmth, receives about 3 mm of precipitation and has approximately 12 rainy days. Generally, based on the data, heavy downpours are not typical for Otaru, but regular precipitation is an integral part of the local climate.

Thus, it is difficult to identify a clearly defined rainy season or dry period in Otaru in the classic sense, as precipitation is distributed throughout the year and monthly volumes in millimeters remain relatively low. However, in terms of frequency, the winter months (especially December and January) can be considered the "wettest" due to frequent snowfall. The "driest" month, both in terms of total precipitation and the number of wet days, is April. August leads in terms of rainfall volume, while November also shows relatively high figures for both precipitation and the number of wet days.

When planning a trip to Otaru, it is important to choose the right wardrobe, considering the distinct seasonal changes and local climate. In winter, from December to February, the city greets visitors with real frosts as average temperatures drop below freezing (reaching -5.3°C in January), and frequent snowfall, especially in December (28 wet days). Therefore, your suitcase should definitely include: very warm outerwear (a down jacket or insulated parka), thermal underwear, fleece layers, wool sweaters, warm trousers, as well as a hat, scarf, and gloves. Waterproof and non-slip winter shoes are essential for comfortably navigating the snowy streets.

Spring (March-May) and autumn (September-November) in Otaru are transitional seasons that require a layered approach to clothing. March is still quite chilly (averaging around 0°C), so a mid-season jacket, sweaters, and warm pants will come in handy. It gets warmer by May (+11.4°C on average), allowing for lighter jackets and tops. September is still pleasantly warm (+17.6°C on average), but temperatures drop significantly by November (+4.0°C on average), and warm items like hats and gloves will be needed again. An umbrella or a light raincoat will be useful during these seasons, as the number of wet days remains high (from 11 days in April to 21 days in November).

Summer in Otaru (June-August) is quite warm and pleasant, with average temperatures ranging from +15.5°C in June to +21.4°C in August. Light casual clothing is suitable for this period: t-shirts, short-sleeved shirts, shorts, skirts, and light trousers. Despite the warmth, evenings can be cool, so a light sweater or cardigan is a good idea. August stands out with the highest rainfall among the summer months (6 mm and 18 wet days), so a compact umbrella or a light waterproof windbreaker might be useful. Don't forget sunscreen, a hat, and sunglasses. Regardless of the season, comfortable walking shoes are an absolute necessity for exploring the charming streets of Otaru.