Last updated: June 18, 2025
In March, the average temperature in Saint-Thomas, Canada hovers around -3°C (27°F), with extremes ranging from a frigid -24°C (-11°F) to a surprisingly mild 18°C (65°F). Expect about 85 mm (3.4 in) of precipitation spread over 11 days, contributing to an average humidity of 86%. Prepare for a chilly and damp atmosphere!
In March in Saint-Thomas, the average temperature is -3°C (27°F). The maximum can reach 18°C (65°F), while the minimum can dip as low as -24°C (-11°F). Be prepared for a wide range of temperatures when traveling during this time.
In Saint-Thomas in March, the precipitation amount is 85 mm (3.4 in) over the course of 11 days.
In Saint-Thomas in March, humidity is 86%. With an average temperature of -3°C (27°F), this humidity feels like a biting chill, making travel uncomfortable as the cold air penetrates through clothing, leaving you feeling damp and uneasy.
In Saint-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 Saint-Thomas.
UV Risk Categories
Weather in Saint-Thomas varies notably across the year, with each month offering distinct climate conditions. This page compares March’s weather to other months in Saint-Thomas, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| 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 Weather | 5°C (42°F) | 121 mm (4.8 inches) | 85% | high |
| May Weather | 13°C (56°F) | 96 mm (3.8 inches) | 80% | very high |
| June Weather | 19°C (66°F) | 95 mm (3.7 inches) | 74% | very high |
| July Weather | 22°C (71°F) | 89 mm (3.5 inches) | 76% | very high |
| August Weather | 20°C (69°F) | 104 mm (4.1 inches) | 75% | very high |
| September Weather | 16°C (60°F) | 64 mm (2.5 inches) | 78% | high |
| October Weather | 9°C (49°F) | 124 mm (4.9 inches) | 86% | moderate |
| November Weather | 0°C (33°F) | 114 mm (4.5 inches) | 88% | moderate |
| December Weather | -6°C (21°F) | 90 mm (3.5 inches) | 89% | low |