Last updated: August 21, 2025
Exploring the September weather in Vilnius, Lithuania, reveals a dynamic climate that transitions from summer warmth to the crispness of autumn. With maximum temperatures peaking at 27°C (81°F) and an average of 13°C (56°F), the month offers a pleasant escape from the heat. However, nights can chill to a minimum of -3°C (27°F), so layering is advisable. Rainfall is relatively moderate, with 74 mm (2.9 in) accumulated over 12 days, contributing to a notably high humidity level of 85%. This blend of temperatures and moisture creates a vibrant atmosphere, ideal for both outdoor adventures and cozy indoor activities.
As September rolls into Vilnius, Lithuania, the transition into autumn brings a noticeable shift in temperatures. The month typically begins with a crisp minimum of -3°C (27°F) and a comfortable average around 13°C (56°F), while daytime highs can reach an enjoyable 27°C (81°F), creating a perfect backdrop for outdoor activities and exploration. This marks a significant change from the peak summer warmth, notably cooling from August's lingering heat. The welcome moderation allows residents and visitors alike to experience the enchanting charm of the city as the foliage begins to change. As the days progress, September provides an inviting contrast to the harsh winter months ahead, offering a brief yet delightful respite with mild weather and vibrant autumn hues.
In September, Vilnius experiences a notable shift in precipitation, with an average of 74 mm (2.9 in) of rain falling over 12 days. This marks a slight decrease from the heavy rains of August, which boasted 105 mm (4.1 in), suggesting a gradual tapering off as summer gives way to autumn. The consistent pattern of 12 rainy days in September mirrors the previous month, exhibiting a steady rhythm of rainfall that characterizes the transition into the cooler months. As the autumn air settles in, residents and visitors alike can expect a charming mix of lingering warmth and refreshing showers, preparing the landscape for the vibrant hues of fall.
As summer fades into autumn in Vilnius, September brings a noticeable shift in humidity levels. With an 85% humidity reading, this month marks a peak compared to the drier summer months of July and August, which hovered around 75%. The return of the wetter conditions is reminiscent of the earlier months in the year, with humidity gradually climbing back toward winter levels as the city transitions into October's 92%. This pattern highlights a typical trend in Vilnius, where humidity is at its highest in the winter and early spring, creating a distinct contrast with the milder, more comfortable summer environment.
As summer transitions into autumn, September in Vilnius sees a moderate UV Index of 5, offering a slight reduction in intensity compared to the peak summer months. This marks a gradual shift from the high UV levels recorded in June and July, where the Index reached 7. As a result, the recommended burn time extends to 30 minutes, allowing residents and visitors to enjoy the outdoors with a touch more caution. Overall, this month serves as a gentle reminder of the waning sun strength, making it essential to stay informed about UV exposure. For more detailed insights, check out the Vilnius UV Index.
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As September unfolds in Vilnius, the city basks in 294 hours of sunshine, a vibrant conclusion to summer's warmth. The sunlight begins to wane after the peak of 434 hours in June, signaling a transition towards autumn. Following a gradual decline throughout July and August, September still retains a delightful amount of daylight—more than it will see in the chillier months ahead. With the days becoming shorter, the golden hues of autumn foliage blend beautifully with the softening sunlight, creating a charming backdrop for the city's historical architecture and scenic vistas. Embracing this gentle retreat into fall, the people of Vilnius savor every sun-kissed moment before the more subdued light of October arrives.
In Vilnius, Lithuania, the chances of sunny weather see a notable shift as the year progresses. While January begins with a mere 9% likelihood, the arrival of summer months, particularly June and July, brings a significant boost with 55% chances of sunshine. As we transition into September, this sunny trend slightly dips to 31%, marking a modest consolidation from the peak summer months. While this isn't as sunny as earlier in the season, September still offers a pleasant opportunity for outdoor activities amidst the softening warmth of early autumn, making it a delightful time to experience the city before the chill sets in.
As September unfolds in Vilnius, Lithuania, the city enjoys 12 hours of daylight, a gentle transition from the sun-drenched days of summer. Following the peak daylight of 17 hours in June, there is a gradual tapering as the days shorten—showcasing an elegant shift from the vibrant energy of July's 16 hours and August's 14 hours. This decrease signals the arrival of autumn, inviting a cozy atmosphere as the leaves begin to change. With each passing month, daylight diminishes, culminating in the winter months where January and December offer just 7 hours of daylight again. September stands as a beautiful bridge, balancing the lingering warmth of summer with the serene embrace of fall.
As summer gives way to autumn, September in Vilnius experiences a refreshing uptick in wind speed, averaging 3.9 m/s (9 mph). This shift signals a transition as the gentler breezes of the warmer months, which lingered around 2.8 to 3.3 m/s, give way to more invigorating winds that pave the way for the crisp air of October. This month stands out with wind speeds on par with the early spring months, reflecting the dynamic climate of Lithuania. With each passing day, the gentle whispers of September winds invite residents and visitors alike to embrace the unfolding beauty of the season, as it heralds cooler days and the vibrant colors of autumn foliage.
Weather in Vilnius varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Vilnius, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather in Vilnius features a mild average temperature of 13°C (56°F), with daily highs reaching up to 27°C (81°F) and lows dipping to -3°C (27°F). The month experiences considerable humidity at 85% and receives about 74 mm (2.9 in) of precipitation over 12 days, making it relatively wet. In stark contrast, January brings much harsher conditions, with average temperatures plummeting to -2°C (28°F) and maximums only reaching 7°C (44°F). The minimum temperatures can drop as low as -24°C (-12°F). Although the precipitation is lower at 51 mm (2.0 in) over 11 days, the higher humidity of 94% creates a persistently cold and damp atmosphere. For more details, visit Vilnius weather in January.
September and February present stark contrasts in weather patterns. In September, temperatures can range from a frosty minimum of -3°C (27°F) to a warm maximum of 27°C (81°F), with an average of 13°C (56°F) and a relatively high humidity level of 85%. This month also sees around 74 mm (2.9 in) of precipitation over approximately 12 days. In comparison, February is significantly colder, with temperatures dipping to a minimum of -22°C (-7°F) and only reaching a maximum of 9°C (49°F), resulting in an average temperature of -2°C (29°F). Although February experiences less precipitation at 39 mm (1.5 in) over about 10 days, the humidity is slightly higher at 92%. For a more detailed look at February weather, visit Vilnius weather in February.
September typically experiences milder weather compared to March, with average temperatures ranging from a comfortable 13°C (56°F) to a maximum of 27°C (81°F). In contrast, March sees much cooler temperatures, with an average of just 1°C (35°F) and lows dipping to -18°C (0°F). Although both months share a similar number of rainy days (12), September receives more precipitation at 74 mm (2.9 in) compared to March's 45 mm (1.8 in). Additionally, the humidity is slightly higher in March at 90%, whereas September's humidity averages around 85%. For more detailed insights on March weather, visit Vilnius weather in March.
September weather typically features a wider temperature range than April, with minimums around -3°C (27°F) and maximums reaching up to 27°C (81°F). In contrast, April's temperatures are generally cooler, with minimums around -6°C (22°F) and maximums peaking at 25°C (77°F). While both months experience considerable humidity, September sees slightly lower levels at 85% compared to April's 86%. Additionally, September tends to be wetter, averaging 74 mm (2.9 in) of precipitation over 12 days, whereas April has only 42 mm (1.7 in) over 9 days. For more details, you can explore Vilnius weather in April.
In comparing the weather of September and May, both months exhibit a range of temperatures with September featuring a slightly higher average temperature of 13°C (56°F) compared to May's 12°C (54°F). September also experiences a wider temperature fluctuation, with a maximum of 27°C (81°F) compared to May's peak of 29°C (84°F). Precipitation is slightly more abundant in September with 74 mm (2.9 in) over 12 days, while May records 64 mm (2.5 in) over 11 days. Furthermore, September has a higher humidity level at 85%, in contrast to May's more moderate 70%. For a more detailed look at May's weather, you can visit this link: Vilnius weather in May.
September and June in Vilnius present distinct weather patterns that reflect the transition from summer to autumn. In June, the temperatures range from a minimum of 3°C (38°F) to a maximum of 33°C (91°F), with an average temperature of 18°C (65°F). This month experiences lower precipitation, with 57 mm (2.2 in) over 11 days and a humidity level of 75%. In contrast, September cools down substantially, featuring temperatures from -3°C (27°F) to a max of 27°C (81°F), with an average of 13°C (56°F). Precipitation increases slightly to 74 mm (2.9 in) spread over 12 days, accompanied by higher humidity at 85%. For more detailed information, you can check Vilnius weather in June.
In comparing the weather conditions of September and July, we find notable differences in temperature and humidity levels. September experiences a wider temperature range, with minimums dipping as low as -3°C (27°F) and maximums reaching up to 27°C (81°F), leading to a cooler average of 13°C (56°F). In contrast, July boasts milder evenings with minimum temperatures of 7°C (45°F) and maximums soaring to 33°C (92°F), giving it a much warmer average of 19°C (66°F). Additionally, while September has a high humidity level at 85%, July is slightly less humid at 75%. Both months witness similar precipitation patterns, with 12 days of rain; however, July's total precipitation slightly surpasses September's, recording 85 mm (3.4 in) compared to September's 74 mm (2.9 in). For more detailed insights, you can check Vilnius weather in July.
September generally experiences cooler temperatures compared to August, with minimums dipping to -3°C (27°F) and maximums reaching 27°C (81°F), while August enjoys milder lows of 5°C (41°F) and highs of 32°C (91°F). The average temperature in September is around 13°C (56°F), significantly lower than August's average of 18°C (64°F). Additionally, September sees an increase in humidity at 85%, compared to August's 74%. While both months have a similar number of rainy days (12), September receives less precipitation, totaling 74 mm (2.9 in) compared to August's 105 mm (4.1 in). For further details on the weather conditions during August, check out Vilnius weather in August.
September offers a wider temperature range with minimums hitting -3°C (27°F) and maximums reaching up to 27°C (81°F), leading to an average of 13°C (56°F). In contrast, October sees cooler temperatures, with a lower average of 8°C (47°F) and maximums that do not exceed 21°C (70°F). While September experiences about 74 mm (2.9 in) of precipitation over 12 days, October has slightly less precipitation at 65 mm (2.5 in), but with increased humidity at 92% over 14 days. For more information, you can check Vilnius weather in October.
In September, the weather is characterized by a mild average temperature of 13°C (56°F), with highs reaching up to 27°C (81°F) and lows dipping to -3°C (27°F). The month experiences a total precipitation of 74 mm (2.9 in) over 12 days, accompanied by relatively high humidity levels at 85%. In contrast, November brings significantly cooler temperatures, with an average of only 4°C (39°F) and maximums capped at 14°C (57°F), while minima can drop to -8°C (18°F). Despite having a lower total precipitation of 55 mm (2.2 in) over the same number of rainy days, November has increased humidity at 93%. For more detailed information, visit Vilnius weather in November.
September and December present stark contrasts in weather conditions. In September, temperatures range from a minimum of -3°C (27°F) to a maximum of 27°C (81°F), with an average of 13°C (56°F). The month sees around 74 mm (2.9 in) of precipitation over 12 days, accompanied by a humidity level of 85%. Conversely, December is significantly colder, with temperatures dipping as low as -15°C (5°F) and peaking at only 9°C (48°F), leading to an average temperature of -1°C (31°F). Precipitation slightly decreases to 59 mm (2.3 in) across 14 days, but humidity rises to 94%. For more detailed information, visit Vilnius weather in December.
As September arrives in Vilnius, the city experiences a notable shift in its weather patterns, marking the transition from the warmth of summer to the crispness of autumn. Temperatures begin to cool, with mild days giving way to chillier nights, inviting residents and visitors alike to embrace warmer layers. The air carries a higher humidity, often accompanied by increased precipitation, making it one of the wetter months of the year with frequent drizzles. This climate not only enhances the vibrant hues of the surrounding landscapes but also sets the stage for cozy indoor activities and the rich cultural events that abound during this time. To explore more about the city's overall climate, check out Vilnius Climate.