September Weather in Petrozavodsk, Russian Federation

Last updated: August 27, 2025

In September, the average temperature in Petrozavodsk, Russian Federation hovers around 10°C (51°F). Expect a minimum of 0°C (32°F) and a maximum of 23°C (73°F), making for a varied climate. You'll also encounter 76 mm (3.0 in) of precipitation spread over 14 days, contributing to a notably high average humidity of 91%. Grab your umbrella and enjoy the cozy atmosphere!

September Temperature in Petrozavodsk

In September in Petrozavodsk, the average temperature is 10°C (51°F). The maximum can reach 23°C (73°F), while the minimum can drop as low as 0°C (32°F). This mild climate makes Petrozavodsk an ideal destination for travelers seeking comfortable weather and outdoor activities.

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

The chart illustrates September temperature patterns in Petrozavodsk, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Petrozavodsk, September typically has an average temperature of 10°C (51°F), with highs reaching up to 23°C (73°F) and lows dropping to around 0°C (32°F).

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

September Precipitation in Petrozavodsk

In Petrozavodsk in September, the precipitation amount is 76 mm (3.0 in) spread over 14 days.

September Precipitation Trends in Petrozavodsk

The chart displays monthly precipitation patterns in Petrozavodsk, 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 Petrozavodsk, September typically receives around 76 mm (3.0 inches) of precipitation spread over approximately 14 days.

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

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Millimeters (mm) Inches (in)

September Humidity in Petrozavodsk

In Petrozavodsk in September, humidity is 91%. With an average temperature of 10°C (51°F), this humidity feels like a damp chill that clings to your skin, making outdoor exploration uncomfortable and leaving you yearning for warm, dry shelter.

September Average Humidity in Petrozavodsk

This chart illustrates the average monthly humidity levels in Petrozavodsk, 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 Petrozavodsk is approximately 91%, 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 Petrozavodsk

In Petrozavodsk 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 Petrozavodsk for better planning.

Maximum UV Index Levels in Petrozavodsk for September

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

Data source: Petrozavodsk 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 Petrozavodsk Compares to Other Months

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

This table compares monthly weather conditions in Petrozavodsk, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-7°C (20°F)	40 mm (1.6 inches)	99%	low
February Weather	-7°C (19°F)	48 mm (1.9 inches)	97%	low
March Weather	-3°C (27°F)	43 mm (1.7 inches)	94%	moderate
April Weather	2°C (36°F)	44 mm (1.8 inches)	89%	moderate
May Weather	9°C (48°F)	65 mm (2.5 inches)	78%	moderate
June Weather	15°C (60°F)	53 mm (2.1 inches)	74%	high
July Weather	17°C (62°F)	98 mm (3.8 inches)	82%	high
August Weather	15°C (59°F)	102 mm (4.0 inches)	87%	moderate
September Weather	10°C (51°F)	76 mm (3.0 inches)	91%	moderate
October Weather	5°C (41°F)	68 mm (2.7 inches)	93%	low
November Weather	0°C (33°F)	41 mm (1.6 inches)	93%	low
December Weather	-5°C (24°F)	64 mm (2.5 inches)	95%	low