Climate and monthly weather forecast
Suwalki, Poland

Suwalki, nestled in Poland, has a predominating Humid Continental climate with no dry season and warm summers, thoroughly classified as Dfb in the Köppen climate classification system. Weather conditions through the calendar year in this region are typified by substantial variances in temperature, humidity, daylight hours, sunshine duration, and rain pattern.

Annually, the city experiences a sweeping range in temperature, from -6.1°C (21°F) as the lowest in February, up to 22.4°C (72.3°F) being the peak average high in July. The humidity remains quite stable, ranging from 77% during the summer months of May to August, to a slightly more humid 86% in December. Rainfall varies moderately over the months, peaking at 78mm (3.07") in June and maintaining the lowest at 25mm (0.98") in February.

Throughout the year, the amount of rainfall ranges from 25mm (0.98") to 78mm (3.07") per month. Rainy days per month follow a steady pattern, levelling between 12 to 16 days, indicating a relatively constant distribution of precipitation throughout the year. In terms of daylight, the least is seen in December, with 7.5 hours daily average, while the most daylight hours occur in June, at 17.1 hours. Sunshine hours follow a similar pattern - a high of 7.5 hours in June contrasting to a low of merely 1 hour in December.

Suwalki is a delightful destination year-round, but the ideal months for a visit would be May to August. During these months, the temperature hovers between 18.5°C (65.3°F) to 22.4°C (72.3°F), providing warm and pleasant weather for outdoor activities. From May to August, the rainfall registers between 53mm (2.09") to 78mm (3.07"), offering a decent blend of sunny and rainy days. The city basks in extended daylight hours, ranging from 16 to 17.1 hours, coupled with considerable sunshine duration from 7.1 to 7.5 hours, ensuring ample opportunities for sightseeing and soaking up the sun.

Although Suwalki has its charm in every season, those unprepared for the harsh cold might find the months from December to February a challenging period to visit. These months bring the coldest temperatures, sinking to lows between -6.6°C (20.1°F) to -4.1°C (24.6°F) and highs of -2.8°C (27°F) to -0.5°C (31.1°F). The shorter daylight hours, from 7.5 in December to 9.8 hours in February, coupled with sparse sunshine hours from 1 to 1.9, result in more pronounced chilly conditions.

Spring in Suwalki, spanning from March to May, sees a gradual bloom in weather conditions. March kicks off the season with average temperatures rising from -2.5°C (27.5°F) to 2.1°C (35.8°F), and it's -6.1°C (21°F) to -3.1°C (26.4°F) for the minimums. By May, the temperature ascends, on average, to 18.5°C (65.3°F), and night temperatures average at 7.3°C (45.1°F). Spring is also marked by an increase in rainfall from 31mm (1.22") in March to 53mm (2.09") by May. The months see increased daylight from 11.9 hours in March to 16 hours by May.

The summer season from June to August provides a warmed respite with temperatures hovering between highs from 20.6°C (69.1°F) to 22.4°C (72.3°F). Night temperatures remain comfortably warm, fluctuating from 9.8°C (49.6°F) to 12°C (53.6°F). While rainfall peaks to the highest of the year at 78mm (3.07") in June, it remains consistent throughout the season, ensuring verdant vistas. The long daylight hours (16.6 to 17.1 hours) coupled with approximately 7 hours of abundant sunshine offer perfect conditions for outdoor exploring and relaxation.

The transition from summer to winter during the months from September to November is evident in the declining temperatures and shorter daylight hours. The average high temperatures tumble from 16.4°C (61.5°F) to 4°C (39.2°F), while the average lows dip from 7.2°C (45°F) to -1.4°C (29.5°F). Rainfall is moderate, sliding from 53mm (2.09") in September to 47mm (1.85") in November. Daylight hours reduce from 12.7 to 8.6 hours over the period and sunshine duration shrinks from 5 to 1.5 hours.

Winter in Suwalki, from December to February, is characterized by the coldest temperatures, from highs of -0.5°C (31.1°F) to -2.8°C (27°F) and lows of -4.1°C (24.6°F) to -6.6°C (20.1°F). December and February are also the year’s most humid months, with 85% to 86% relative humidity. This period sees the lowest amount of daylight at 7.5 to 9.8 hours and shorter sunshine duration, from just 1 to 1.9 hours. Snow is a common occurrence, replacing the regular rain with its own charm.

The weather in Suwalki, Poland in January entails harsh temperatures coupled with high humidity. The maximum and minimum temperatures reported are -2.8°C (27°F) and -6.6°C (20.1°F) respectively. Dressing in multiple layers is advised to tackle the frosty chill. Weather in January »

In February, we see a continuity in the cold conditions noted in January. A slight increase of temperature in February offers a little leniency with maximum and minimum values of -2.5°C (27.5°F) and -6.1°C (21°F) respectively. Weather in February »

The weather begins to evolve in March, with signs of warmer conditions starting to appear. Despite being marginally warmer, the weather remains brisk, with temperatures ranging from -3.1°C (26.4°F) to 2.1°C (35.8°F). March signals the beginning of transition from winter to spring. Weather in March »

Moving into April, Suwalki starts to witness the real onset of the spring season. From 1.8°C (35.2°F) to 10.2°C (50.4°F), the warmth begins to envelop the city. The lengthening days coupled with rising temperatures delivers a refreshing break to residents from the chilly winter months. Weather in April »

In May, the pleasant spring weather continues to prevailing, with an increasingly warmer climate. A range of temperature from 7.3°C (45.1°F) to 18.5°C (65.3°F) further complements the spring joy. More hours of daylight invites outdoor activities and socializing. Weather in May »

As the month of June unfolds, Summer steps through the door in Suwalki. Boasting temperatures between 9.8°C (49.6°F) and 20.6°C (69.1°F), the city basks in the summer glow. Long daylight hours foster strolls in the park and enjoying the sun. Weather in June »

July is typically the warmest month in Suwalki, with balmy temperatures enveloping the city. Temperatures record a high of 22.4°C (72.3°F) and a low of 12°C (53.6°F). Residents and visitors find it an opportune time to engage in a variety of outdoor activities. Weather in July »

August carries forward the warmth of July into the ending summer season in Suwalki. Even with temperatures fluctuating from 10.8°C (51.4°F) to 21.4°C (70.5°F), the outdoor fun continues. Come prepared, as it yields the highest rainfall of the year. Weather in August »

With September comes the gentle transition from summer to autumn. Temperatures cool off and range from 7.2°C (45°F) to 16.4°C (61.5°F), welcoming the beginning of Fall. As daylight hours shorten, the tree foliage starts to change color, turning the city into a beautiful canvas painted with hues of fall. The onset of September in Suwalki brings a small change in high-temperatures, falling from an agreeable 21.4°C (70.5°F) in August to a comfortable 16.4°C (61.5°F). Weather in September »

Suwalki in October showcases a symphony of vibrant fall colors. With temperatures between 2°C (35.6°F) to 11.8°C (53.2°F), a slow and steady decline in the thermometer readings forewarns winter's arrival. Everyone relishes the fall festivities, but a smart layering wardrobe to accommodate colder temperatures becomes a necessity. Transition into October in Suwalki subtly marks a drop in the average high-temperature, moderately moving from a refreshing 16.4°C (61.5°F) in September to a fresh 11.8°C (53.2°F). Weather in October »

November in Suwalki continues the autumn chill, while transitioning into the early stages of winter. Temperatures dip further, marking the thermometer with readings between -1.4°C (29.5°F) and 4°C (39.2°F). The city acclimatizes to the lowering temperatures and shorter sunlight hours. Weather in November »

December welcomes winter in Suwalki with temperatures as low as -4.1°C (24.6°F) and as high as -0.5°C (31.1°F). The city transforms into a winter wonderland due to the low temperatures and frequent snowfall. Enjoying a cozy evening indoors becomes a common indulgence during the long winter nights. Weather in December »