September Weather in Sylva, Russian Federation

Last updated: August 27, 2025

In September, the average temperature in Sylva, Russian Federation hovers around 10°C (49°F), with a minimum of -1°C (31°F) and a maximum of 25°C (77°F). Expect a relatively wet month with 67 mm (2.6 in) of precipitation spread over 13 days. Additionally, the average humidity is quite high at 89%, making for a unique climate experience!

September Temperature in Sylva

In September in Sylva, the average temperature is 10°C (49°F). The maximum can reach 25°C (77°F), while the minimum can drop to as low as -1°C (31°F). This makes it an ideal time for travelers to experience a range of weather conditions, so be sure to pack accordingly!

September Weather in Sylva: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Sylva, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sylva, September typically has an average temperature of 10°C (49°F), with highs reaching up to 25°C (77°F) and lows dropping to around -1°C (31°F).

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

September Precipitation in Sylva

In Sylva in September, the precipitation amount is 67 mm (2.6 in) spread over 13 days.

September Precipitation Trends in Sylva

The chart displays monthly precipitation patterns in Sylva, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Sylva, September typically receives around 67 mm (2.6 inches) of precipitation spread over approximately 13 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Sylva

In Sylva in September, humidity is 89%. With an average temperature of 10°C (49°F), this humidity feels like a damp chill that penetrates your clothes and makes outdoor activities uncomfortable, often leaving travelers feeling clammy and in need of extra layers to stay warm.

September Average Humidity in Sylva

This chart illustrates the average monthly humidity levels in Sylva, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Sylva is approximately 89%, offering insight into how humid the weather typically is during this month.

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

September UV Index in Sylva

In Sylva in September, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Sylva for better planning.

Maximum UV Index Levels in Sylva for September

The chart shows the monthly maximum UV Index (UVI) for Sylva in September, 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 September, the maximum UV index in Sylva typically reaches 4, which falls under the moderate exposure category.

Data source: Sylva September 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 September Weather in Sylva Compares to Other Months

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

This table compares monthly weather conditions in Sylva, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-12°C (11°F)	39 mm (1.5 inches)	99%	low
February Weather	-10°C (13°F)	48 mm (1.9 inches)	97%	low
March Weather	-5°C (24°F)	47 mm (1.9 inches)	95%	moderate
April Weather	3°C (38°F)	48 mm (1.9 inches)	90%	moderate
May Weather	11°C (52°F)	56 mm (2.2 inches)	79%	high
June Weather	15°C (59°F)	80 mm (3.1 inches)	71%	high
July Weather	19°C (66°F)	105 mm (4.1 inches)	81%	high
August Weather	16°C (61°F)	89 mm (3.5 inches)	80%	high
September Weather	10°C (49°F)	67 mm (2.6 inches)	89%	moderate
October Weather	4°C (40°F)	66 mm (2.6 inches)	91%	moderate
November Weather	-4°C (25°F)	59 mm (2.3 inches)	94%	low
December Weather	-9°C (16°F)	49 mm (1.9 inches)	90%	low