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September Weather in Sylva, Russian Federation

Last updated: August 27, 2025

In September, the average temperature in Sylva, Russian Federation rests at a cool 9°C (48°F), with a minimum plunge of -3°C (27°F) and a maximum rise to 26°C (79°F). Expect around 66 mm (2.6 in) of precipitation over 13 days, contributing to an average humidity of a humid 89%.

September Temperature in Sylva

In September in Sylva, the average temperature is 9°C (48°F). Maximums can reach 26°C (79°F), while minimums can plummet as low as -3°C (27°F). Be prepared for a wide range of temperatures when traveling to Sylva during this month.

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 9°C (48°F), with highs reaching up to 26°C (79°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec91223385157646048382314
Data source: Temperature data for Sylva generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Sylva

In Sylva in September, the total precipitation amount is 66 mm (2.6 in) spread over the course of 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 66 mm (2.6 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec364147515883859666584840
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Sylva

In Sylva in September humidity is 89%. With an average temperature of 9°C (48°F), this humidity feels like a chill that lingers in the air, wrapping around you like a damp blanket, making outdoor activities challenging and encouraging a cozy retreat indoors.

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.
JanFebMarAprMayJunJulAugSepOctNovDec99%96%95%90%78%70%82%82%89%90%95%93%
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.
JanFebMarAprMayJunJulAugSepOctNovDec124567764311
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.
 TemperaturePrecipitationHumidityUV
January Weather-13°C (9°F)35 mm (1.4 inches)99%low
February Weather-11°C (13°F)41 mm (1.6 inches)96%low
March Weather-5°C (23°F)47 mm (1.9 inches)95%moderate
April Weather3°C (38°F)51 mm (2.0 inches)90%moderate
May Weather11°C (51°F)58 mm (2.3 inches)78%high
June Weather14°C (57°F)83 mm (3.3 inches)70%high
July Weather18°C (65°F)85 mm (3.3 inches)82%high
August Weather15°C (60°F)96 mm (3.8 inches)81%high
September Weather9°C (48°F)66 mm (2.6 inches)89%moderate
October Weather3°C (38°F)58 mm (2.3 inches)90%moderate
November Weather-5°C (23°F)48 mm (1.9 inches)94%low
December Weather-10°C (14°F)40 mm (1.6 inches)93%low

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