October Weather in Petersburg, United States

Last updated: June 24, 2025

In October, the average temperature in Petersburg, United States hovers around 6°C (44°F), with a minimum dipping to -4°C (26°F) and a maximum reaching 16°C (61°F). Expect an average precipitation of 276 mm (10.9 in) spread over 20 days, accompanied by a high average humidity of 96%. Stay prepared for a chilly and damp month!

October Temperature in Petersburg

In October in Petersburg, the average temperature is 6°C (44°F). Maximums can reach 16°C (61°F), while minimums can drop as low as -4°C (26°F). Be sure to pack layers to stay comfortable during your travels.

October Weather in Petersburg: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Petersburg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Petersburg, October typically has an average temperature of 6°C (44°F), with highs reaching up to 16°C (61°F) and lows dropping to around -4°C (26°F).

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

October Precipitation in Petersburg

In Petersburg in October, the precipitation amount is 276 mm (10.9 in) over the course of 20 days.

October Precipitation Trends in Petersburg

The chart displays monthly precipitation patterns in Petersburg, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Petersburg, October typically receives around 276 mm (10.9 inches) of precipitation spread over approximately 20 days.

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

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Millimeters (mm) Inches (in)

October Humidity in Petersburg

In Petersburg in October humidity is 96%. With an average temperature of 6°C (44°F), this humidity feels like stepping into a damp, chilly embrace that clings to your skin, making travel uncomfortable and heavy as every breath brings a sensation of thick, cool air that can dampen your spirits.

October Average Humidity in Petersburg

This chart illustrates the average monthly humidity levels in Petersburg, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Petersburg is approximately 96%, offering insight into how humid the weather typically is during this month.

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

October UV Index in Petersburg

In Petersburg in October, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Petersburg, you can check the information here.

Maximum UV Index Levels in Petersburg for October

The chart shows the monthly maximum UV Index (UVI) for Petersburg in October, 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 October, the maximum UV index in Petersburg typically reaches 3, which falls under the moderate exposure category.

Data source: Petersburg October 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 October Weather in Petersburg Compares to Other Months

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

This table compares monthly weather conditions in Petersburg, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (30°F)	225 mm (8.9 inches)	88%	low
February Weather	-2°C (29°F)	176 mm (6.9 inches)	84%	low
March Weather	1°C (35°F)	177 mm (7.0 inches)	86%	moderate
April Weather	5°C (42°F)	190 mm (7.5 inches)	88%	moderate
May Weather	10°C (50°F)	160 mm (6.3 inches)	88%	high
June Weather	13°C (55°F)	206 mm (8.1 inches)	96%	high
July Weather	15°C (59°F)	195 mm (7.7 inches)	110%	high
August Weather	15°C (59°F)	297 mm (11.7 inches)	111%	high
September Weather	12°C (54°F)	288 mm (11.3 inches)	104%	moderate
October Weather	6°C (44°F)	276 mm (10.9 inches)	96%	moderate
November Weather	3°C (38°F)	309 mm (12.2 inches)	92%	low
December Weather	0°C (33°F)	258 mm (10.2 inches)	91%	low