Koszalin

To ensure your journey is comfortable, please review the latest weather information for Koszalin. Below you will find detailed forecasts and charts to help you plan your day.

The climate of Koszalin can be described as temperate transitional with a noticeable maritime influence due to its proximity to the Baltic Sea. The weather here is mild: there are no severe frosts in winter and no exhausting heat in summer, making the city pleasant to visit at any time of year. Thanks to the sea air, the climate is quite humid, and temperature fluctuations are moderated.

Summers in Koszalin are usually warm and comfortable, with average daytime temperatures around +20...+22°C, which is ideal for walks and sightseeing. The warmest month is August. Winter is mild, with temperatures rarely dropping deep below freezing, staying at an average of +1...+4°C even in January and February. However, travelers should keep in mind that winters can be windy and damp.

A characteristic feature of the local weather is the consistent probability of precipitation throughout the year. There is no pronounced "dry" or "wet" season: rainy days are distributed fairly evenly across the calendar, ranging from 9 to 17 days per month. Therefore, when planning your trip, it is recommended to always have an umbrella or a light raincoat with you, regardless of the season.

The climate in Koszalin is characterized by mildness and an absence of extreme temperature spikes, making the city attractive to visit at any time of year. The winter period here is relatively calm: the lowest temperatures are recorded in January, when the average is about +2.1°C. Even on the coldest winter nights, the temperature rarely drops significantly below zero, staying at an average of +0.4°C, which helps avoid harsh frosts.

The summer season brings pleasant but not exhausting warmth. The hottest month of the year is traditionally August, when the average temperature reaches +19.0°C, and during the day, the air warms up to a comfortable +22.5°C. July and June also offer mild weather with average values of +17...+18°C. These temperatures are ideal for long walks and sightseeing, as stuffy heat is rare here.

Spring and autumn are characterized by smooth transitions. By May, stable warmth of around +12°C is established, and September continues the summer vibes with averages around +15.6°C. Notably, the daily temperature range in Koszalin is relatively small: the difference between daytime highs and nighttime lows, even at the summer peak, rarely exceeds 7 degrees, and in winter, it is only about 3 degrees, ensuring stable thermal comfort throughout the day.

Precipitation in Koszalin is distributed fairly evenly throughout the year, but its nature and frequency change noticeably depending on the season. Winter months, especially January and December, are characterized by a high frequency of precipitation: in January, about 17 days with precipitation are recorded. Given average temperatures just above freezing, travelers at this time of year may encounter changeable weather—from drizzling rain to sleet.

Spring brings the driest period of the year. March and April are characterized by the fewest rainy days—in April, the number drops to an average of nine. This time is considered one of the most comfortable for walking and sightseeing, as the probability of getting wet is minimal compared to other seasons.

In summer, despite the rising temperatures, the rain returns. July is not only one of the warmest but also a fairly humid month: precipitation falls on about 15 days, and the total amount reaches its annual maximum. In autumn, especially in October, the frequency of rain increases again (up to 16 days), so it is highly recommended to bring a reliable umbrella or raincoat for a trip during the shoulder season.

The weather in Koszalin is heavily influenced by the proximity of the Baltic Sea, so it can be changeable and windy at any time of year. The main secret to a comfortable trip here is the principle of layering, which allows you to easily adapt to temperature changes throughout the day. Regardless of the season, be sure to pack a compact umbrella or a high-quality raincoat, as precipitation occurs quite regularly, averaging 9 to 17 days per month. For long walks through city streets and parks, comfortable, preferably waterproof flat shoes are indispensable.

If you are planning a trip in the summer (June–August), expect comfortable but not hot weather: the average daytime temperature is about 17–19°C, rarely exceeding 22°C. Bring T-shirts and light clothing, but don't forget a sweatshirt or fleece jacket for cool evenings and windy days. In spring and early autumn, the weather is more fickle, so it's worth packing a windproof mid-season jacket and a light scarf.

In winter (December–February), Koszalin does not experience severe frosts; temperatures usually hover around +2...+4°C, but due to high humidity and the sea breeze, the cold can feel more piercing. For this period, a warm windproof jacket or down coat, a hat, and gloves are necessary. Pay special attention to your footwear: it should be warm and resistant to slush, as it often rains instead of snowing. A set of thermal underwear will be a great addition to keep you cozy during long outdoor excursions.