Index

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• Introduction
• The coast - Gdansk
• Inland areas - Warsaw
• Mountains
• Best Time
• What to pack

Introduction

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The climate in Poland is continental, with very cold winters, often below freezing (0 °C or 32 °F), and warm summers. The climate is milder along the northern coast, overlooking the Baltic Sea, while it becomes progressively more continental going to the south, where the distance from the sea is greater.
Winter, from December to February, is cold throughout the country. The average temperatures in January is around freezing along the Baltic coast, and progressively decreases towards the south and the east: it ranges from about -1 °C (30 °F) in the north-western area to -4 °C (25 °F) in the easternmost area, on the border with Belarus and Lithuania, while it's around -3 °C (27 °F) in the southern area. In Warsaw, the capital, located near the center of the country, the average in January is -2.5 °C (27.5 °F). The ground is often covered with snow from December to mid-March, although snowfall is generally not abundant. However, the weather during winter can have different characteristics: usually, the sky is gray, the temperature is around freezing or a few degrees below, and a light snow falls, but when cold air masses from Russia reach the country, the temperature decreases by many degrees, and drops below -20 °C (-4 °F). The coldest records are around -25/-30 °C (-13/-22 °F) in the interior, and therefore in much of Poland, while they are around -18/-20 °C (0/-4 °F) along the northern coast.
Spring, from March to May, is initially cold, and in early April, there can be late cold waves with snow showers. In April and early May, cold days alternate with the first warm days, while by mid-May, the temperature becomes steadily pleasant, with highs around 15/20 °C (59/68 °F) and sometimes above.
Summer, from June to August, is mild or pleasantly warm: the average daily temperatures are around 17/18 °C (63/64 °F). The Baltic coast, which during winter was the mildest zone, becomes the coolest in summer: here, highs in July and August are around 20/21 °C (68/70 °F), while they gradually increase towards the south, reaching 23/24 °C (73/75 °F) in the center and south of the country.
Summer in Poland is the rainiest season. This is due to the fact that Atlantic disturbances can arrive even in this season, in addition, thunderstorms in the afternoon may occur, more frequently in inland areas, and even more so near the Sudetes and Tatra Mountains in the south.
In July, it rains on average for 10 days on the north coast, 11 days in Warsaw, and 12 in the south. However, there is a moderate amount of sunny days, which may be hot, especially when warm currents arrive from the south-east: in these cases, the temperature can reach 30/35 °C (86/95 °F).
In autumn, from September to November, the temperatures decrease rapidly, but the first half of September is still pleasant. Afterwards, the weather becomes cold and dull.

The coast

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Gdansk

Here is the average temperature of Gdansk, located on the northern coast.

In Gdansk, precipitation amounts to 590 mm (23 in) per year; the rainiest period runs from June to August, while precipitation in winter is not abundant.

The Baltic Sea is very cool, if not cold, even in summer, however, the water temperature reaches 18 °C (64 °F) in August.

Inland areas

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Warsaw

As mentioned, the climate in inland areas is slightly more continental, as we can see from the average temperatures of Warsaw.

Precipitation in Warsaw is not abundant, in fact, it amounts to about 550 mm (21.5 in) per year; the driest seasons are winter and spring, while the rainiest is summer. Here is average precipitation.

The sun in Warsaw and in Poland is rarely seen from November to February, while in summer, it shines for a moderate amount of hours, although it can be obscured not only by Atlantic disturbances but also by afternoon cloudiness, which can sometimes lead to thunderstorms. Here are the average sunshine hours per day.

Mountains

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In southern Poland, where mountain ranges such as the Sudetes and the Tatras are found, the climate is naturally colder. Winters are cold and snowy, but not much colder than in the lowlands (because of the temperature inversion, a phenomenon whereby cold air stagnates on the lowest layers of the atmosphere, which is typical of cold plains in winter). Summers are cool, with frequent afternoon thunderstorms. In Zakopane, a popular tourist resort, at 850 meters (2,800 ft) above sea level, the average temperature ranges from -5 °C (23 °F) in January to 15 °C (59 °F) in July. At higher altitudes, at 2,000 meters (6,500 feet) above sea level, it ranges from -9 °C (16 °F) in January to 7.5 °C (45.5 °F) in July.
On the slopes of these southern mountains and in the valleys, the Halny, a warm and dry wind, similar to the Foehn, can blow, especially in early spring and in autumn; sometimes, this wind can be strong and cause damage.
The highest peak in the country is Mount Rysy, 2,503 meters (8,212 feet) high, on the border with Slovakia.
Here are the average temperatures of Mount Sniežka, located at 1,600 meters (5,300 ft) of altitude, in the southwest of the country, at the border with the Czech Republic.

Best Time

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The best time to visit Poland is summer, from June to August, however, you can generally go in the warm season, from mid-May to mid-September. The temperatures are usually cool at night and mild or pleasantly warm during the day, however, there can be cool and rainy days, but also hot and sunny days.
In the mountains, it's still possible to ski at Easter, while at Christmas, it can be very cold, and the days are short. In February, it's cold as well, but at least the days are a bit longer.

What to pack

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In winter: bring very warm clothes, a fleece, a down jacket, a hat, gloves, a scarf, and a raincoat or umbrella.
In summer: bring light clothes, t-shirts, but also long pants, a jacket and a sweater for the evening or for cool days; a raincoat or umbrella.

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