March Weather in St. Thomas, Canada

Last updated: June 18, 2025

In St. Thomas, Canada, the average temperature in March hovers around 1°C (34°F), with a range that can dip to a chilly -14°C (7°F) and rise to a comfortable 15°C (59°F). During this month, expect about 81 mm (3.2 in) of precipitation spread over 11 days, contributing to an average humidity level of 87%. Prepare for a wintery experience as nature blankets the landscape!

March Temperature in St. Thomas

In March in St. Thomas, the average temperature is 1°C (34°F). The maximum can reach 15°C (59°F) and the minimum can be as low as -14°C (7°F). Be prepared for a wide range of temperatures when traveling to this destination during the month.

March Weather in St. Thomas: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in St. Thomas, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In St. Thomas, March typically has an average temperature of 1°C (34°F), with highs reaching up to 15°C (59°F) and lows dropping to around -14°C (7°F).

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

March Precipitation in St. Thomas

In St. Thomas in March, the precipitation amount is 81 mm (3.2 in) over a span of 11 days.

March Precipitation Trends in St. Thomas

The chart displays monthly precipitation patterns in St. Thomas, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In St. Thomas, March typically receives around 81 mm (3.2 inches) of precipitation spread over approximately 11 days.

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

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Millimeters (mm) Inches (in)

March Humidity in St. Thomas

In St. Thomas in March humidity is 87%. With an average temperature of 1°C (34°F), this humidity feels like a chilling blanket enveloping you, making every step outside feel heavy and damp, and leaving you longing for warmth and comfort while traveling.

March Average Humidity in St. Thomas

This chart illustrates the average monthly humidity levels in St. Thomas, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in St. Thomas is approximately 87%, offering insight into how humid the weather typically is during this month.

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

March UV Index in St. Thomas

In St. Thomas in March, 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 St. Thomas.

Maximum UV Index Levels in St. Thomas for March

The chart shows the monthly maximum UV Index (UVI) for St. Thomas in March, 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 March, the maximum UV index in St. Thomas typically reaches 5, which falls under the moderate exposure category.

Data source: St. Thomas March 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 March Weather in St. Thomas Compares to Other Months

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

This table compares monthly weather conditions in St. Thomas, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (27°F)	76 mm (3.0 inches)	90%	moderate
February Weather	-3°C (27°F)	79 mm (3.1 inches)	90%	moderate
March Weather	1°C (34°F)	81 mm (3.2 inches)	87%	moderate
April Weather	6°C (43°F)	106 mm (4.2 inches)	87%	very high
May Weather	13°C (55°F)	99 mm (3.9 inches)	82%	very high
June Weather	19°C (66°F)	93 mm (3.7 inches)	81%	very high
July Weather	22°C (72°F)	91 mm (3.6 inches)	79%	very high
August Weather	22°C (71°F)	96 mm (3.8 inches)	80%	very high
September Weather	18°C (65°F)	82 mm (3.2 inches)	81%	very high
October Weather	12°C (55°F)	123 mm (4.9 inches)	84%	high
November Weather	5°C (41°F)	94 mm (3.7 inches)	88%	moderate
December Weather	1°C (34°F)	77 mm (3.0 inches)	87%	low