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October Weather in Petersburg, United States

Last updated: June 24, 2025

In October, the average temperature in Petersburg, United States hovers around 13°C (55°F). However, be prepared for a wide range, as it can drop to a chilly -4°C (26°F) or rise to a warm 30°C (87°F). With 99 mm (3.9 in) of precipitation over the course of 12 days, and an average humidity of 82%, it's wise to plan accordingly for those often unpredictable weather changes!

October Temperature in Petersburg

In October in Petersburg, the average temperature is 13°C (55°F). Maximum temperatures can reach 30°C (87°F), while minimums can drop as low as -4°C (26°F). Be prepared for a wide range of temperatures when traveling to Petersburg during this month.

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 13°C (55°F), with highs reaching up to 30°C (87°F) and lows dropping to around -4°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec272838486071757367554033
Data source: Temperature data for Petersburg 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.

October Precipitation in Petersburg

In Petersburg in October, the total precipitation amount is 99 mm (3.9 in) recorded over a span of 12 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 99 mm (3.9 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec65677789126861057359998254
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

October Humidity in Petersburg

In Petersburg in October, humidity is 82%. With an average temperature of 13°C (55°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities sticky and uncomfortable for traveling.

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 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%87%88%81%82%81%78%78%82%89%86%
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 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Petersburg, you can refer to this Hourly UV Index in Petersburg.

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 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec25599101098642
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.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (28°F)65 mm (2.6 inches)88%low
February Weather-2°C (29°F)67 mm (2.6 inches)87%moderate
March Weather3°C (38°F)77 mm (3.0 inches)87%moderate
April Weather9°C (48°F)89 mm (3.5 inches)87%very high
May Weather16°C (60°F)126 mm (5.0 inches)81%very high
June Weather21°C (71°F)86 mm (3.4 inches)82%very high
July Weather24°C (75°F)105 mm (4.1 inches)81%very high
August Weather23°C (73°F)73 mm (2.9 inches)78%very high
September Weather19°C (67°F)59 mm (2.3 inches)78%very high
October Weather13°C (55°F)99 mm (3.9 inches)82%high
November Weather4°C (40°F)82 mm (3.2 inches)89%moderate
December Weather1°C (33°F)54 mm (2.1 inches)86%low

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