October Weather in Sejny, Poland

Last updated: August 27, 2025

In October, the average temperature in Sejny, Poland hovers around 9°C (48°F). Expect a range of temperatures, with a minimum of -2°C (28°F) and a maximum hitting 23°C (73°F). During this month, precipitation totals about 61 mm (2.4 in) over 12 days, contributing to an average humidity of 88%.

October Temperature in Sejny

In October in Sejny, the average temperature is 9°C (48°F). The maximum can reach 23°C (73°F), and the minimum can be as low as -2°C (28°F). It's best to pack layers to stay comfortable during your travels.

October Weather in Sejny: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Sejny, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sejny, October typically has an average temperature of 9°C (48°F), with highs reaching up to 23°C (73°F) and lows dropping to around -2°C (28°F).

Data source: Temperature data for Sejny generated using information from the Copernicus Climate Change Service.

October Precipitation in Sejny

In Sejny in October, the total precipitation amount is 61 mm (2.4 in), which occurs over a span of 12 days.

October Precipitation Trends in Sejny

The chart displays monthly precipitation patterns in Sejny, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Sejny, October typically receives around 61 mm (2.4 inches) of precipitation spread over approximately 12 days.

Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

October Humidity in Sejny

In Sejny in October, humidity is 88%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill settling into your bones, making outdoor exploration feel heavy and oppressive.

October Average Humidity in Sejny

This chart illustrates the average monthly humidity levels in Sejny, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Sejny is approximately 88%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Sejny

In Sejny in October, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Sejny, you can check the information here.

Maximum UV Index Levels in Sejny for October

The chart shows the monthly maximum UV Index (UVI) for Sejny in October, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In October, the maximum UV index in Sejny typically reaches 3, which falls under the moderate exposure category.

Data source: Sejny October UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How October Weather in Sejny Compares to Other Months

Weather in Sejny varies notably across the year, with each month offering distinct climate conditions. This page compares October’s weather to other months in Sejny, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Sejny, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (29°F)	41 mm (1.6 inches)	93%	low
February Weather	-1°C (30°F)	34 mm (1.3 inches)	90%	low
March Weather	2°C (36°F)	40 mm (1.6 inches)	88%	moderate
April Weather	7°C (45°F)	45 mm (1.8 inches)	77%	moderate
May Weather	13°C (55°F)	70 mm (2.8 inches)	59%	high
June Weather	18°C (65°F)	51 mm (2.0 inches)	59%	very high
July Weather	19°C (66°F)	93 mm (3.7 inches)	60%	high
August Weather	18°C (65°F)	87 mm (3.4 inches)	60%	high
September Weather	14°C (57°F)	70 mm (2.7 inches)	72%	moderate
October Weather	9°C (48°F)	61 mm (2.4 inches)	88%	moderate
November Weather	4°C (40°F)	39 mm (1.5 inches)	91%	low
December Weather	0°C (32°F)	53 mm (2.1 inches)	93%	low