September Weather in Istok, Russian Federation

Last updated: August 27, 2025

In September, the average temperature in Istok, Russian Federation hovers around 12°C (54°F). Expect a chillier minimum of 1°C (34°F), while the mercury can rise to a pleasant 24°C (75°F). The month typically sees 94 mm (3.7 in) of precipitation spread over 14 days, contributing to a cozy average humidity of 83%.

September Temperature in Istok

In September in Istok, the average temperature is 12°C (54°F). It can reach a maximum of 24°C (75°F) and dip to a minimum of 1°C (34°F). This makes it an ideal time for travelers to enjoy moderate weather with the possibility of both warm and cooler days.

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

The chart illustrates September temperature patterns in Istok, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Istok, September typically has an average temperature of 12°C (54°F), with highs reaching up to 24°C (75°F) and lows dropping to around 1°C (34°F).

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

September Precipitation in Istok

In Istok in September, the precipitation amount is 94 mm (3.7 in) recorded over the course of 14 days.

September Precipitation Trends in Istok

The chart displays monthly precipitation patterns in Istok, 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 Istok, September typically receives around 94 mm (3.7 inches) of precipitation spread over approximately 14 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 Istok

In Istok in September humidity is 83%. With an average temperature of 12°C (54°F), this humidity feels like a heavy blanket wrapping around you, making outdoor exploration feel sticky and uncomfortable, which can dampen the excitement of traveling.

September Average Humidity in Istok

This chart illustrates the average monthly humidity levels in Istok, 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 Istok is approximately 83%, 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 Istok

In Istok 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 Istok.

Maximum UV Index Levels in Istok for September

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

Data source: Istok 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 Istok Compares to Other Months

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

This table compares monthly weather conditions in Istok, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-17°C (2°F)	12 mm (0.5 inches)	94%	low
February Weather	-16°C (4°F)	11 mm (0.4 inches)	91%	low
March Weather	-6°C (22°F)	14 mm (0.6 inches)	79%	moderate
April Weather	2°C (35°F)	13 mm (0.5 inches)	69%	moderate
May Weather	6°C (44°F)	34 mm (1.3 inches)	64%	high
June Weather	12°C (54°F)	33 mm (1.3 inches)	64%	very high
July Weather	16°C (62°F)	85 mm (3.3 inches)	76%	very high
August Weather	17°C (63°F)	84 mm (3.3 inches)	79%	high
September Weather	12°C (54°F)	94 mm (3.7 inches)	83%	moderate
October Weather	4°C (40°F)	37 mm (1.4 inches)	81%	moderate
November Weather	-4°C (25°F)	27 mm (1.1 inches)	83%	low
December Weather	-11°C (12°F)	33 mm (1.3 inches)	92%	low