January Weather in Petersburg, United States

Last updated: June 24, 2025

In Petersburg, United States, the average temperature in January hovers around -3°C (28°F), with extreme lows dipping to -27°C (-16°F) and highs reaching up to 16°C (61°F). Expect about 65 mm (2.6 in) of precipitation spread over 8 days, contributing to a notably high average humidity of 88%.

January Temperature in Petersburg

In January in Petersburg, the average temperature is -3°C (28°F). The maximum can reach 16°C (61°F) and the minimum can be as low as -27°C (-16°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack appropriately for both chilly and milder days.

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

The chart illustrates January 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, January typically has an average temperature of -3°C (28°F), with highs reaching up to 16°C (61°F) and lows dropping to around -27°C (-16°F).

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

January Precipitation in Petersburg

In Petersburg in January, the total precipitation amount is 65 mm (2.6 in) spread over the course of 8 days.

January Precipitation Trends in Petersburg

The chart displays monthly precipitation patterns in Petersburg, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Petersburg, January typically receives around 65 mm (2.6 inches) of precipitation spread over approximately 8 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Petersburg

In Petersburg in January, humidity is 88%. With an average temperature of -3°C (28°F), this humidity feels like a biting chill that penetrates your clothes, making outdoor excursions uncomfortable and urging you to find shelter often.

January Average Humidity in Petersburg

This chart illustrates the average monthly humidity levels in Petersburg, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Petersburg is approximately 88%, offering insight into how humid the weather typically is during this month.

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

January UV Index in Petersburg

In Petersburg in January, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Petersburg, you can visit Hourly UV Index in Petersburg.

Maximum UV Index Levels in Petersburg for January

The chart shows the monthly maximum UV Index (UVI) for Petersburg in January, 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 January, the maximum UV index in Petersburg typically reaches 2, which falls under the low exposure category.

Data source: Petersburg January 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 January 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 January’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 January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
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 Weather	3°C (38°F)	77 mm (3.0 inches)	87%	moderate
April Weather	9°C (48°F)	89 mm (3.5 inches)	87%	very high
May Weather	16°C (60°F)	126 mm (5.0 inches)	81%	very high
June Weather	21°C (71°F)	86 mm (3.4 inches)	82%	very high
July Weather	24°C (75°F)	105 mm (4.1 inches)	81%	very high
August Weather	23°C (73°F)	73 mm (2.9 inches)	78%	very high
September Weather	19°C (67°F)	59 mm (2.3 inches)	78%	very high
October Weather	13°C (55°F)	99 mm (3.9 inches)	82%	high
November Weather	4°C (40°F)	82 mm (3.2 inches)	89%	moderate
December Weather	1°C (33°F)	54 mm (2.1 inches)	86%	low