October Weather in Sumy, Ukraine

Last updated: August 28, 2025

In Sumy, Ukraine, the average temperature in October hovers around 9°C (49°F). Expect to experience a chilly minimum of -6°C (21°F) and a warm maximum of 23°C (74°F). During the month, you can anticipate 36 mm (1.4 in) of precipitation spread over 7 days, with an average humidity level of 84%. Stay prepared for a mix of weather conditions!

October Temperature in Sumy

In October in Sumy, the average temperature is 9°C (49°F), with maximums reaching 23°C (74°F) and minimums dipping as low as -6°C (21°F). This wide range of temperatures makes it essential for travelers to pack layers and be prepared for varying weather conditions.

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

The chart illustrates October temperature patterns in Sumy, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sumy, October typically has an average temperature of 9°C (49°F), with highs reaching up to 23°C (74°F) and lows dropping to around -6°C (21°F).

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

October Precipitation in Sumy

In Sumy in October, the total precipitation amount is 36 mm (1.4 in) over a span of 7 days.

October Precipitation Trends in Sumy

The chart displays monthly precipitation patterns in Sumy, 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 Sumy, October typically receives around 36 mm (1.4 inches) of precipitation spread over approximately 7 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

October Humidity in Sumy

In Sumy in October, humidity is 84%. With an average temperature of 9°C (49°F), this humidity feels like a chilly embrace, making travel uncomfortable as the dampness seeps into your clothes and lingers in the air, leaving you feeling cool yet clammy.

October Average Humidity in Sumy

This chart illustrates the average monthly humidity levels in Sumy, 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 Sumy is approximately 84%, 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 Sumy

In Sumy 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 Sumy, you can check the information here.

Maximum UV Index Levels in Sumy for October

The chart shows the monthly maximum UV Index (UVI) for Sumy 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 Sumy typically reaches 3, which falls under the moderate exposure category.

Data source: Sumy 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 Sumy Compares to Other Months

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

This table compares monthly weather conditions in Sumy, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (25°F)	43 mm (1.7 inches)	92%	low
February Weather	-3°C (26°F)	45 mm (1.8 inches)	93%	low
March Weather	1°C (35°F)	40 mm (1.6 inches)	90%	moderate
April Weather	9°C (48°F)	40 mm (1.6 inches)	79%	moderate
May Weather	15°C (59°F)	64 mm (2.5 inches)	66%	high
June Weather	20°C (68°F)	58 mm (2.3 inches)	65%	very high
July Weather	21°C (69°F)	84 mm (3.3 inches)	55%	very high
August Weather	21°C (69°F)	28 mm (1.1 inches)	49%	high
September Weather	15°C (60°F)	39 mm (1.5 inches)	69%	high
October Weather	9°C (49°F)	36 mm (1.4 inches)	84%	moderate
November Weather	2°C (36°F)	37 mm (1.4 inches)	92%	low
December Weather	-1°C (30°F)	69 mm (2.7 inches)	94%	low