September Weather in Osa, Russian Federation

Last updated: August 27, 2025

In September, the average temperature in Osa, Russian Federation hovers around 9°C (49°F). However, temperatures can vary significantly, dipping as low as -4°C (25°F) and peaking at a warm 27°C (81°F). During this month, you can expect about 65 mm (2.6 in) of precipitation spread over 10 days, contributing to an average humidity level of 84%. Stay prepared for a mix of conditions!

September Temperature in Osa

In September in Osa, the average temperature is 9°C (49°F). The maximum can reach 27°C (81°F) and the minimum can be as low as -4°C (25°F). It's advisable to pack for a range of weather conditions to enjoy your travels comfortably.

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

The chart illustrates September temperature patterns in Osa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Osa, September typically has an average temperature of 9°C (49°F), with highs reaching up to 27°C (81°F) and lows dropping to around -4°C (25°F).

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

September Precipitation in Osa

In Osa in September, the precipitation amount is 65 mm (2.6 in) over a span of 10 days.

September Precipitation Trends in Osa

The chart displays monthly precipitation patterns in Osa, 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 Osa, September typically receives around 65 mm (2.6 inches) of precipitation spread over approximately 10 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 Osa

In Osa in September, 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.

September Average Humidity in Osa

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

In Osa in September, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Osa.

Maximum UV Index Levels in Osa for September

The chart shows the monthly maximum UV Index (UVI) for Osa 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 Osa typically reaches 5, which falls under the moderate exposure category.

Data source: Osa 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 Osa Compares to Other Months

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

This table compares monthly weather conditions in Osa, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-20°C (-5°F)	10 mm (0.4 inches)	94%	low
February Weather	-18°C (0°F)	10 mm (0.4 inches)	90%	low
March Weather	-7°C (20°F)	13 mm (0.5 inches)	81%	moderate
April Weather	3°C (38°F)	12 mm (0.5 inches)	73%	moderate
May Weather	10°C (50°F)	38 mm (1.5 inches)	67%	high
June Weather	17°C (62°F)	49 mm (1.9 inches)	64%	very high
July Weather	19°C (66°F)	68 mm (2.7 inches)	71%	very high
August Weather	17°C (62°F)	59 mm (2.3 inches)	73%	high
September Weather	9°C (49°F)	65 mm (2.6 inches)	84%	moderate
October Weather	1°C (34°F)	20 mm (0.8 inches)	84%	moderate
November Weather	-10°C (15°F)	13 mm (0.5 inches)	90%	low
December Weather	-18°C (-1°F)	24 mm (0.9 inches)	96%	low