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January Weather in Bay Saint Louis, United States

Last updated: June 24, 2025

In January, the average temperature in Bay Saint Louis, United States hovers around 12°C (54°F). Expect a range with minimums dipping to -3°C (26°F) and maximums reaching up to 23°C (74°F). During this period, you'll likely encounter 107 mm (4.2 in) of precipitation spread over approximately 10 days, accompanied by an average humidity of 82%.

January Temperature in Bay Saint Louis

In January in Bay Saint Louis, the average temperature is 12°C (54°F). Maximum temperatures can reach up to 23°C (74°F), while minimums can drop as low as -3°C (26°F). Be prepared for a range of weather conditions, so pack layers when visiting during this time.

January Weather in Bay Saint Louis: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Bay Saint Louis, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bay Saint Louis, January typically has an average temperature of 12°C (54°F), with highs reaching up to 23°C (74°F) and lows dropping to around -3°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec545864697681828280746357
Data source: Temperature data for Bay Saint Louis 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.

January Precipitation in Bay Saint Louis

In Bay Saint Louis in January, the precipitation amount is 107 mm (4.2 in) accumulated over a period of 10 days.

January Precipitation Trends in Bay Saint Louis

The chart displays monthly precipitation patterns in Bay Saint Louis, 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 Bay Saint Louis, January typically receives around 107 mm (4.2 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec1071228912613827920024015613359120
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Bay Saint Louis

In Bay Saint Louis in January humidity is 82%. With an average temperature of 12°C (54°F), this humidity feels like a heavy blanket wrapping around you, making every step feel sluggish and sweat-inducing, which can be quite uncomfortable for traveling.

January Average Humidity in Bay Saint Louis

This chart illustrates the average monthly humidity levels in Bay Saint Louis, 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 Bay Saint Louis is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%78%73%71%79%78%80%76%83%87%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Bay Saint Louis

In Bay Saint Louis in January, 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 Bay Saint Louis.

Maximum UV Index Levels in Bay Saint Louis for January

The chart shows the monthly maximum UV Index (UVI) for Bay Saint Louis 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 Bay Saint Louis typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589111111121110864
Data source: Bay Saint Louis 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 Bay Saint Louis Compares to Other Months

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

This table compares monthly weather conditions in Bay Saint Louis, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather12°C (54°F)107 mm (4.2 inches)82%moderate
February Weather15°C (59°F)122 mm (4.8 inches)80%very high
March Weather18°C (64°F)89 mm (3.5 inches)80%very high
April Weather20°C (69°F)126 mm (4.9 inches)78%extreme
May Weather24°C (76°F)138 mm (5.4 inches)73%extreme
June Weather27°C (81°F)279 mm (11.0 inches)71%extreme
July Weather28°C (82°F)200 mm (7.9 inches)79%extreme
August Weather28°C (83°F)239 mm (9.4 inches)78%extreme
September Weather27°C (80°F)155 mm (6.1 inches)80%very high
October Weather23°C (75°F)133 mm (5.2 inches)76%very high
November Weather17°C (63°F)59 mm (2.3 inches)83%high
December Weather14°C (58°F)120 mm (4.7 inches)87%moderate

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