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January Weather in Saint-Thomas, Canada

Last updated: June 18, 2025

In Saint-Thomas, Canada, the average temperature in January hovers around -9°C (15°F). Be prepared for chilly extremes, with minimums dropping to -33°C (-26°F) and maximums reaching a mild 10°C (50°F). This month sees approximately 83 mm (3.3 in) of precipitation spread across 10 days, accompanied by a high average humidity of 93%. Bundle up and stay cozy!

January Temperature in Saint-Thomas

In January in Saint-Thomas, the average temperature is -9°C (15°F). Maximums can reach 10°C (50°F), while minimums can drop as low as -33°C (-26°F). Travelers should prepare for a wide range of temperatures and dress accordingly to enjoy their stay.

January Weather in Saint-Thomas: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Saint-Thomas, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint-Thomas, January typically has an average temperature of -9°C (15°F), with highs reaching up to 10°C (50°F) and lows dropping to around -33°C (-26°F).
JanFebMarAprMayJunJulAugSepOctNovDec151827415665716960483321
Data source: Temperature data for Saint-Thomas 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 Saint-Thomas

In Saint-Thomas in January, the total precipitation amount is 83 mm (3.3 in) over a span of 10 days.

January Precipitation Trends in Saint-Thomas

The chart displays monthly precipitation patterns in Saint-Thomas, 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 Saint-Thomas, January typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec8382851219695891046412411490
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Saint-Thomas

In Saint-Thomas in January, humidity is 93%. With an average temperature of -9°C (15°F), this humidity feels like a bone-chilling dampness that seeps into your clothes, making travel outside uncomfortable and frigid, despite the low temperatures.

January Average Humidity in Saint-Thomas

This chart illustrates the average monthly humidity levels in Saint-Thomas, 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 Saint-Thomas is approximately 93%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%86%85%80%74%76%75%78%86%89%89%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Saint-Thomas

In Saint-Thomas 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 Saint-Thomas, you can visit Hourly UV Index in Saint-Thomas.

Maximum UV Index Levels in Saint-Thomas for January

The chart shows the monthly maximum UV Index (UVI) for Saint-Thomas 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 Saint-Thomas typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245799887532
Data source: Saint-Thomas 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 Saint-Thomas Compares to Other Months

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

This table compares monthly weather conditions in Saint-Thomas, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (15°F)83 mm (3.3 inches)93%low
February Weather-8°C (18°F)82 mm (3.2 inches)92%moderate
March Weather-3°C (27°F)85 mm (3.4 inches)86%moderate
April Weather5°C (42°F)121 mm (4.8 inches)85%high
May Weather13°C (56°F)96 mm (3.8 inches)80%very high
June Weather19°C (66°F)95 mm (3.7 inches)74%very high
July Weather22°C (71°F)89 mm (3.5 inches)76%very high
August Weather20°C (69°F)104 mm (4.1 inches)75%very high
September Weather16°C (60°F)64 mm (2.5 inches)78%high
October Weather9°C (49°F)124 mm (4.9 inches)86%moderate
November Weather0°C (33°F)114 mm (4.5 inches)88%moderate
December Weather-6°C (21°F)90 mm (3.5 inches)89%low

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