Weather in Olsztyn

Keep up to date with the weather conditions in Olsztyn to ensure your trip is as comfortable as possible. In this section, you will find the latest weather data, detailed forecasts, and visual charts.

The climate of Olsztyn can be described as temperate, with distinct seasons typical for this part of Poland. The weather here is rarely extreme: you will not encounter exhausting tropical heat, making the city an attractive destination for travellers who prefer comfortable conditions for walks and sightseeing.

Summer in the city is usually warm and pleasant, with average daytime temperatures reaching 22–23°C in July and August, making it ideal for relaxing by the lakes. Winters are cool here but generally quite mild, with average temperatures hovering around zero or slightly below. During this period, the city is often enveloped in a calm winter atmosphere, although severe frosts occur infrequently.

A characteristic feature of the local climate is the fairly stable distribution of wet days throughout the year. Precipitation can occur both in winter and at the height of summer, so having an umbrella or a light raincoat in your luggage is useful in any season. The transitional periods — spring and autumn — bring gradual temperature changes, offering tourists the opportunity to enjoy the shifting natural colours in the invigorating cool air.

The temperature patterns in Olsztyn are marked by distinct seasonality, offering tourists a variety of weather conditions throughout the year. The coldest period is traditionally winter, especially January, when the average temperature drops to -0.5°C, and night frosts down to -2.5°C are possible. The winter months are characterized by moderate coolness: the thermometer often hovers around the zero mark, creating the atmosphere of a mild European winter, although warm clothing is still necessary for long walks.

Summer in this region of Poland usually delights with comfortable warmth without exhausting heat, making it the perfect time for sightseeing. The peak temperatures occur in August, when the air warms up to an average of +23.4°C during the day, with July following very closely behind. Such weather allows you to enjoy outdoor activities without suffering from sweltering heat, as even on the warmest days, the temperature rarely exceeds comfortable levels.

Travellers should take into account daily temperature fluctuations, which are most noticeable during the summer season. The difference between day and night readings can be around 9–10 degrees: after the pleasant daytime warmth of +22…+23°C, nights bring freshness as the temperature drops to +13…+14°C. Therefore, even for a summer trip to Olsztyn, it is recommended to bring a light jacket or sweater for evening strolls.

Precipitation in Olsztyn is distributed quite evenly throughout the year, so an umbrella or raincoat may come in handy for a traveller in any season. In winter, from December to February, when temperatures often drop below freezing, snowfalls are characteristic. The wettest winter month is January: snow or wet snow can fall for an average of 16 days, creating picturesque winter landscapes.

Summer is also not without moisture, although the rains here have a different character. July stands out as one of the wettest months of the year: rain is observed on about 15 days per month. During the warm season, precipitation often falls in the form of short-term but intense showers, which refresh the air and are quickly replaced by sunny weather.

The most favourable time for those who wish to avoid frequent rains can be considered the transitional seasons. April and September are the driest months of the year: the number of days with precipitation drops to a minimum (about 10 days). This makes spring and early autumn an excellent time for walking tours and exploring the city's architecture.

When packing for Olsztyn, it is important to consider the changeable nature of the weather in this picturesque lake region. In winter, temperatures often hover around zero or drop slightly below, so a warm windproof jacket, hat, scarf, and gloves will be absolutely necessary for comfortable walks. Summer is usually mild and pleasant, with average highs around +23°C, so light clothing made from natural fabrics is suitable for the daytime; however, for the evening, be sure to bring a cosy sweater or hoodie, as it can be cool by the water.

Weather statistics show that precipitation in the region falls quite regularly throughout the year (on average from 10 to 16 rainy days per month). In this regard, an umbrella or a compact raincoat should be mandatory items on your packing list, regardless of the season. Also, pay special attention to footwear: it should be comfortable, flat-soled for walking on the cobblestones of the Old Town, and preferably waterproof for excursions through parks and along embankments.

For trips in spring and autumn, when the weather is most capricious, it is best to stick to the principle of layering. A combination of a T-shirt, a fleece jacket, and a light windbreaker will allow you to quickly adapt to temperature changes throughout the day. Do not forget about sun protection: even with variable cloudiness, sunscreen and sunglasses will come in handy, especially while relaxing by the numerous lakes for which this part of Poland is famous.