nomadseason

January Weather in Petersburg, United States

Last updated: June 24, 2025

In January, the average temperature in Petersburg, United States hovers around -1°C (30°F). However, be prepared for extremes, as temperatures can plunge to a chilling -26°C (-14°F) or rise to a mild 11°C (52°F). Expect a precipitation amount of 225 mm (8.9 in) over 17 days, contributing to an average humidity of 88% that adds to the overall brisk atmosphere.

January Temperature in Petersburg

In January in Petersburg, the average temperature is -1°C (30°F), with maximums reaching 11°C (52°F) and minimums plummeting to as low as -26°C (-14°F). Travelers should be prepared for a range of winter temperatures, making warm clothing essential for their trip.

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 -1°C (30°F), with highs reaching up to 11°C (52°F) and lows dropping to around -26°C (-14°F).
JanFebMarAprMayJunJulAugSepOctNovDec302935425055595854433732
Data source: Temperature data for Petersburg generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in Petersburg

In Petersburg, in January, the precipitation amount is 225 mm (8.9 in) over the course of 17 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 225 mm (8.9 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec225177177190160206195297288276309258
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

January Humidity in Petersburg

In Petersburg in January humidity is 88%. With an average temperature of -1°C (30°F), this humidity feels like a biting chill that penetrates through your layers, making travel uncomfortable as every gust of wind becomes a sharp reminder of the cold and damp air surrounding you.

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.
JanFebMarAprMayJunJulAugSepOctNovDec88%84%86%88%88%96%110%111%104%96%92%91%
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 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the 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 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123566775311
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.
 TemperaturePrecipitationHumidityUV
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 Weather1°C (35°F)177 mm (7.0 inches)86%moderate
April Weather5°C (42°F)190 mm (7.5 inches)88%moderate
May Weather10°C (50°F)160 mm (6.3 inches)88%high
June Weather13°C (55°F)206 mm (8.1 inches)96%high
July Weather15°C (59°F)195 mm (7.7 inches)110%high
August Weather15°C (59°F)297 mm (11.7 inches)111%high
September Weather12°C (54°F)288 mm (11.3 inches)104%moderate
October Weather6°C (44°F)276 mm (10.9 inches)96%moderate
November Weather3°C (38°F)309 mm (12.2 inches)92%low
December Weather0°C (33°F)258 mm (10.2 inches)91%low

Compare Petersburg's Climate with Cities Worldwide